Relevant bibliographies by topics / Ambient air processing

Academic literature on the topic 'Ambient air processing'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Ambient air processing.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Ambient air processing"

1

Mativenga, Mallory, Jeoungmin Ji, Nhu Thi to Hoang, and Farjana Haque. "Ambient Air Stability of Hybrid Perovskite Thin‐Film Transistors by Ambient Air Processing." Advanced Materials Interfaces 7, no. 6 (January 22, 2020): 1901777. http://dx.doi.org/10.1002/admi.201901777.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Špirić, Zdravko, and Nikolai R. Mashyanov. "Mercury measurements in ambient air near natural gas processing facilities." Fresenius' Journal of Analytical Chemistry 366, no. 5 (March 2, 2000): 429–32. http://dx.doi.org/10.1007/s002160050087.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Jin, Zujin, Gang Cheng, Shichang Xu, and Wei Gu. "Dynamic Disturbance and Error Analysis of Flexible Support System for Large Optical Mirror Processing." Applied Sciences 11, no. 6 (March 18, 2021): 2715. http://dx.doi.org/10.3390/app11062715.

Full text
Abstract:
To improve the accuracy of a flexible support system (FSS) used for optical mirror processing, the influence of air content in the working medium and ambient temperature change on the FSS is analyzed and studied. First, the disturbance model of the FSS and single support cylinder affected by different air contents in the working medium and ambient temperature is established, and the mapping relationship between the influencing factors and the affected factors is analyzed. Then, the effects of ambient temperature change on volume, support height, and support pressure for different air contents are simulated and analyzed separately. The results of the simulation obtained show that when the working medium is mixed with different volume fractions of air and the ambient temperature changes, upper and lower chamber volumes, support rigidity, and support height of the support cylinder are also changed. Finally, an experimental study of pressure changes in the upper and lower chambers, support height, and support rigidity changes at different ambient temperatures and air contents are carried out. By measuring the support height, support pressure, and support rigidity error, the effectiveness of the established mathematical disturbance model of FSS is further verified. It not only provides a theoretical basis for improving the support accuracy of the FSS but also provides a foundation for the application of the FSS in the processing stage of large optical mirrors.
APA, Harvard, Vancouver, ISO, and other styles
4

Ahmed, Muhammad Imran, Hammad Tanveer Butt, Zakir Hussain, Iftikhar Ahmed Shahid, and Amir Habib. "Effects of ambient air processing on morphology and photoconductivity of CH3NH3PbI3." Journal of Materials Science: Materials in Electronics 27, no. 11 (July 15, 2016): 12028–35. http://dx.doi.org/10.1007/s10854-016-5351-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Richards, John, and Todd Brozell. "Compilation and Evaluation of Ambient Respirable Crystalline Silica Air Quality Data near Sand Quarries and Processing Facilities." Atmosphere 12, no. 7 (July 13, 2021): 903. http://dx.doi.org/10.3390/atmos12070903.

Full text
Abstract:
Ambient respirable crystalline silica air quality is of concern to many communities near mineral processing facilities and to regulatory agencies serving these communities. Accurate air quality data are needed to compare measured respirable crystalline silica concentrations at the fencelines of mineral processing facilities with the published health effect guideline published by the California Office of Health Hazard Assessment (OEHHA). This article is a compilation and evaluation of air quality studies around a diverse set of nineteen sand producing facilities. The respirable crystalline silica air quality data compiled by Air Control Techniques, P.C. and most of the data compiled by other researchers cited in this article have been measured using EPA Reference Method samplers adjusted for respirable crystalline silica sampling and NIOSH Method 7500 X-ray diffraction analyses. The authors conclude that (1) the ambient concentrations in the diverse set of mineral processing facilities were consistently lower than the 3.0 microgram per cubic meter chronic reference exposure level (REL) adopted by OEHHA, (2) upwind-to-downwind fenceline concentration differences were small, and (3) the fenceline t concentrations were often at background concentration levels. The authors recommend additional sampling studies to better characterize background concentrations of ambient respirable crystalline silica.
APA, Harvard, Vancouver, ISO, and other styles
6

Zemlyanova, M. A., A. N. Perezhogin, and Yu V. Koldibekova. "Trends detected in children’s health and their relation with basic aerogenic risk factors under exposure to specific ambient air contamination caused by metallurgic and wood-processing enterprises." Health Risk Analysis, no. 4 (December 2020): 46–53. http://dx.doi.org/10.21668/health.risk/2020.4.05.

Full text
Abstract:
Industrial objects including metallurgic and wood-processing enterprises that emit hazardous chemicals into ambient air are often located within or close to residential areas; it results in poorer ambient air quality and health disorders caused by it, first of all, among children. Our research objects were chemicals contents in ambient air in a residential area exposed to emissions from metallurgic and wood-processing enterprises (the test territory) and in an area where there were no such productions (the reference territory), and primary morbidity among children in both of them. We determined priority chemical risk factors basing on hygienic assessment of ambient air quality and calculation of risks that non-carcinogenic effects would occur in organs and systems of children who lived in a zone exposed to the given industrial objects. These factors included aluminum oxide, particulate matter, phenol, and gaseous fluorides and their contents were up to 5.0 times higher than permissible levels. We detected negative trends in primary morbidity among children and established authentic models showing dependence between a probable growth in morbidity as per respiratory diseases, diseases of the nervous system, gastric diseases, diseases of the musculoskeletal system and connective tissue, and diseases of the urogenital system and total doses of chemicals under aerogenic exposure. All the above mentioned indicates that poor ambient air quality in a residential area can make for a growth in related morbidity as per the given nosologies. Established and parameterized cause-and-effect relations allow predicting negative responses in critical organs and systems (as per the given nosologies) of exposed children. It provides scientific substantiation for developing relevant prevention activities aimed at reducing and preventing negative consequences for health of children living in regions where large metallurgic and wood-processing enterprises are located
APA, Harvard, Vancouver, ISO, and other styles
7

Zemlyanova, M. A., A. N. Perezhogin, and Yu V. Koldibekova. "Trends detected in children’s health and their relation with basic aerogenic risk factors under exposure to specific ambient air contamination caused by metallurgic and wood-processing enterprises." Health Risk Analysis, no. 4 (December 2020): 46–53. http://dx.doi.org/10.21668/health.risk/2020.4.05.eng.

Full text
Abstract:
Industrial objects including metallurgic and wood-processing enterprises that emit hazardous chemicals into ambient air are often located within or close to residential areas; it results in poorer ambient air quality and health disorders caused by it, first of all, among children. Our research objects were chemicals contents in ambient air in a residential area exposed to emissions from metallurgic and wood-processing enterprises (the test territory) and in an area where there were no such productions (the reference territory), and primary morbidity among children in both of them. We determined priority chemical risk factors basing on hygienic assessment of ambient air quality and calculation of risks that non-carcinogenic effects would occur in organs and systems of children who lived in a zone exposed to the given industrial objects. These factors included aluminum oxide, particulate matter, phenol, and gaseous fluorides and their contents were up to 5.0 times higher than permissible levels. We detected negative trends in primary morbidity among children and established authentic models showing dependence between a probable growth in morbidity as per respiratory diseases, diseases of the nervous system, gastric diseases, diseases of the musculoskeletal system and connective tissue, and diseases of the urogenital system and total doses of chemicals under aerogenic exposure. All the above mentioned indicates that poor ambient air quality in a residential area can make for a growth in related morbidity as per the given nosologies. Established and parameterized cause-and-effect relations allow predicting negative responses in critical organs and systems (as per the given nosologies) of exposed children. It provides scientific substantiation for developing relevant prevention activities aimed at reducing and preventing negative consequences for health of children living in regions where large metallurgic and wood-processing enterprises are located
APA, Harvard, Vancouver, ISO, and other styles
8

Zemlyanova, M. A., A. N. Perezhogin, and Yu V. Koldibekova. "Trends detected in children’s health and their relation with basic aerogenic risk factors under exposure to specific ambient air contamination caused by metallurgic and wood-processing enterprises." Health Risk Analysis, no. 4 (December 2020): 46–53. http://dx.doi.org/10.21668/health.risk/2020.4.05.eng.

Full text
Abstract:
Industrial objects including metallurgic and wood-processing enterprises that emit hazardous chemicals into ambient air are often located within or close to residential areas; it results in poorer ambient air quality and health disorders caused by it, first of all, among children. Our research objects were chemicals contents in ambient air in a residential area exposed to emissions from metallurgic and wood-processing enterprises (the test territory) and in an area where there were no such productions (the reference territory), and primary morbidity among children in both of them. We determined priority chemical risk factors basing on hygienic assessment of ambient air quality and calculation of risks that non-carcinogenic effects would occur in organs and systems of children who lived in a zone exposed to the given industrial objects. These factors included aluminum oxide, particulate matter, phenol, and gaseous fluorides and their contents were up to 5.0 times higher than permissible levels. We detected negative trends in primary morbidity among children and established authentic models showing dependence between a probable growth in morbidity as per respiratory diseases, diseases of the nervous system, gastric diseases, diseases of the musculoskeletal system and connective tissue, and diseases of the urogenital system and total doses of chemicals under aerogenic exposure. All the above mentioned indicates that poor ambient air quality in a residential area can make for a growth in related morbidity as per the given nosologies. Established and parameterized cause-and-effect relations allow predicting negative responses in critical organs and systems (as per the given nosologies) of exposed children. It provides scientific substantiation for developing relevant prevention activities aimed at reducing and preventing negative consequences for health of children living in regions where large metallurgic and wood-processing enterprises are located
APA, Harvard, Vancouver, ISO, and other styles
9

Capitano, Maegan L., Scott Cooper, Bin Guo, Xinxin Huang, Carol Sampson, Safa Mohamad, Edward F. Srour, Christie M. Orschell, and Hal E. Broxmeyer. "Collection and Processing of Bone Marrow at 3% Oxygen Significantly Alters the Manifestation of Aged Mouse Hematopoietic Stem Cell Phenotype." Blood 134, Supplement_1 (November 13, 2019): 1202. http://dx.doi.org/10.1182/blood-2019-128642.

Full text
Abstract:
Aging is an inevitable process associated with eventual deterioration of normal physiological functions. Aged hematopoiesis is associated with increased numbers of hematopoietic stem cells (HSC), but with decreased HSC functional activity (e.g. decreased engrafting capability in lethally irradiated mice and a shift in the myeloid:lymphoid bias of the engrafting HSC of the old mice, such that there are more myeloid but fewer lymphoid cells generated from HSC of the old mice). Production of HSC and progenitor (HPC) cells ex vivo is more efficient when cells are cultured in a hypoxic environment of ~ 5% oxygen tension than when cells are grown at ambient air (~21% oxygen). The bone marrow (BM) microenvironment niche that nurtures the survival and production of HSC and HPC and hematopoiesis during adult life is a hypoxic environment (~1-5% oxygen tension) compared to that of ambient air. However, almost all results of studies of young and aged mouse hematopoiesis have been based on numbers and activity of HSC and HPC that have been collected and processed in ambient air. Our recent work evaluating hematopoiesis in BM cells of young adult mice and with human cord blood cells found, through a phenomenon we designated Extra Physiological Oxygen Shock/Stress (EPHOSS), that there is a large loss of HSC with an increase of HPC within minutes of the collection of these cells in ambient air (Mantel et al., Cell, 2015). This led us to reason that perhaps what we know about aging hematopoiesis might not be entirely accurate and that a re-evaluation of aged HSC, HPC, and hematopoiesis was in order. We hypothesized that hematopoiesis in aged (~20-27 months of age) mice may not be as dysregulated as reported but that collection and processing of BM from the aged mice is more sensitive than similar cells from young (~6-16 weeks) mice to EPHOSS-induced events generated by the collection of the cells in ambient air. We evaluated BM from three different mouse strains (CB6, BALB/c, and C57Bl/6) at 20-25 months vs. 6-16 weeks of age, collected/processed in ambient air or hypoxia (3% oxygen). BM from old mice collected/processed under hypoxic conditions exhibited phenotypically increased long-term HSC and common lymphoid progenitor (CLP) numbers and decreased common myeloid progenitor (CMP) and granulocyte-macrophage progenitor (GMP) numbers when compared to old BM collected/processed under ambient air conditions. BM collected from old C57Bl/6 mice under hypoxia had increased engrafting capability more closely matching that of young BM. This was associated with a 3.14-fold increase in the number of competitive repopulating units (representative of functional HSC) in old BM collected under hypoxic conditions compared to old BM collected in ambient air as determined through limiting dilution analysis. The myeloid:lymphoid ratio of old BM collected under hypoxia matched that of young BM collected under air. This was associated with decreased cycling of CFU-GM, BFU-E, and CFU-GEMM in old BM collected/processed in hypoxia. Enhanced numbers/function of old BM HSCs collected in hypoxia is associated with changes in expression of CXCR4 (and HSC homing capability), CCR5, stress protein levels (e.g. HSP40 etc) and ROS (both total and mitochondrial). All of these noted changes demonstrated that the old BM collected/processed under hypoxic conditions more closely resemble functionally young BM. Thus, age-related differences between the HSC/HPC populations are not as drastic as previously reported and reflect the increased sensitivity of hematopoiesis from aged mice to an artificial ambient air collection procedure. Disclosures No relevant conflicts of interest to declare.
APA, Harvard, Vancouver, ISO, and other styles
10

Ahmed, Mehreen, Rafia Mumtaz, Syed Mohammad Hassan Zaidi, Maryam Hafeez, Syed Ali Raza Zaidi, and Muneer Ahmad. "Distributed Fog Computing for Internet of Things (IoT) Based Ambient Data Processing and Analysis." Electronics 9, no. 11 (October 22, 2020): 1756. http://dx.doi.org/10.3390/electronics9111756.

Full text
Abstract:
Urban centers across the globe are under immense environmental distress due to an increase in air pollution, industrialization, and elevated living standards. The unmanageable and mushroom growth of industries and an exponential soar in population has made the ascent of air pollution intractable. To this end, the solutions that are based on the latest technologies, such as the Internet of things (IoT) and Artificial Intelligence (AI) are becoming increasingly popular and they have capabilities to monitor the extent and scale of air contaminants and would be subsequently useful for containing them. With centralized cloud-based IoT platforms, the ubiquitous and continuous monitoring of air quality and data processing can be facilitated for the identification of air pollution hot spots. However, owing to the inherent characteristics of cloud, such as large end-to-end delay and bandwidth constraint, handling the high velocity and large volume of data that are generated by distributed IoT sensors would not be feasible in the longer run. To address these issues, fog computing is a powerful paradigm, where the data are processed and filtered near the end of the IoT nodes and it is useful for improving the quality of service (QoS) of IoT network. To further improve the QoS, a conceptual model of distributed fog computing and a machine learning based data processing and analysis model is proposed for the optimal utilization of cloud resources. The proposed model provides a classification accuracy of 99% while using a Support Vector Machines (SVM) classifier. This model is also simulated in iFogSim toolkit. It affords many advantages, such as reduced load on the central server by locally processing the data and reporting the quality of air. Additionally, it would offer the scalability of the system by integrating more air quality monitoring nodes in the IoT network.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Ambient air processing"

1

Trushliakov, Eugeniy, Andrii Radchenko, Mykola Radchenko, Serhiy Kantor, and Oleksii Zielikov. "The Efficiency of Refrigeration Capacity Regulation in the Ambient Air Conditioning Systems." Thesis, 2020. https://doi.org/10.1007/978-3-030-50491-5_33.

Full text
Abstract:
The Efficiency of Refrigeration Capacity Regulation in the Ambient Air Conditioning Systems / E. Trushliakov, A. Radchenko, M. Radchenko, S. Kantor, O. Zielikov // Proceedings of the 3rd Intern. Conf. on Design, Simulation, Manufacturing: The Innovation Exchange «Advances in Design, Simulation and Manufacturing III». – Kharkiv, 2020. – Vol. 244. – P. 343–353.
Abstract. The operation of the ambient air conditioning systems (ACS) is characterized by considerable fluctuations of the heat load in response to the current climatic conditions. It needs the analyses of the efficiency of the application of compressors with frequency converters for refrigeration capacity regulation in actual climatic conditions. A new method and approach to analyzing the effectiveness of ACS cooling capacity adjusting by using the compressor with changing the rotational speed of the motor as an example have been developed, according to which the overall range of changeable heat loads is divided into two zones: the zone of ambient air processing with considerable fluctuations of the current heat load, that requires effective refrigeration capacity regulation by the compressor with frequency converters (from 100% rated refrigeration capacity down to about 50%) and not an adjustable zone of reduced refrigeration capacity below 50% rated refrigeration capacity of the compressor. The magnitudes of threshold refrigeration capacity between both zones are chosen according to the rational value of installed (design) refrigeration capacity on the ACS, required for cooling the ambient air to a target temperature that ensures the maximum annual refrigeration capacity production in actual current climatic conditions. The proposed method and approach to the analysis of the efficiency of the refrigeration capacity regulation of the ACS compressor by distributing the overall range of changes in current heat loads allows increasing the efficiency of utilizing the installed refrigeration capacity in prevailing climatic conditions.
APA, Harvard, Vancouver, ISO, and other styles
2

Radchenko, M., E. Trushliakov, A. Radchenko, S. Kantor, V. Tkachenko, М. Радченко, Є. Трушляков, А. Радченко, С. Кантор, and В. Ткаченко. "Approach to enhance the energetic efficiency of air conditioning systems by cooling load distribution in ambient air procession." Thesis, 2020. http://eir.nuos.edu.ua/xmlui/handle/123456789/4346.

Full text
Abstract:
Approach to enhance the energetic efficiency of air conditioning systems by cooling load distribution in ambient air procession = Підхід до підвищення енергетичної ефективності систем кондиціювання повітря шляхом розподілу холодопродуктивності при обробці зовнішнього повітря / M. Radchenko, E. Trushliakov, A. Radchenko, S. Kantor, V. Tkachenko // Матеріали XI міжнар. наук.-техн. конф. "Інновації в суднобудуванні та океанотехніці". В 2 т. – Миколаїв : НУК, 2020. – Т. 1. – С. 490–500.
У загальному випадку весь діапазон холодопродуктивності будь-якої системи кондиціювання повітря включає нестабільний діапазон і порівняно стабільну частину холодопродуктивності для подальшого охолодження повітря. Таким чином, стабільний діапазон холодопродуктивності може бути забезпечений роботою звичайного компресора, в той час як режим із значними коливаннями холодопродуктивності вимагає її модуляції. Пропонований підхід може бути використаний для проектування систем зі змінним потоком хладагента (VRF), забезпечених системою обробки зовнішнього повітря (OAP).
Abstract. In general case, an overall cooling load band of any air conditioning system comprises the unstable cooling load range and a comparatively stable cooling load part for further air cooling. Thus, the stable cooling load range can be covered by operation of conventional compressor, meantime mode with considerable cooling load fluctuation needs load modulation. A proposed method can be adopted for designing Variable Refrigerant Flow (VRF) systems provided with Outdoor Air Processing (OAP) system.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Ambient air processing"

1

United States. Environmental Protection Agency. Office of Air Quality Planning and Standards., ed. Emissions inventory guidance for implementation of ozone and particulate matter national ambient air quality standards (NAAQS) and regional haze regulations. Research Triangle Park, NC: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Emissions, Monitoring, and Analysis Division, Emission Factor and Inventory Group, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Ambient air processing"

1

Ji, Shi Ming, L. B. Zhang, Li Zhang, X. J. Jia, Qiao Ling Yuan, Ju Long Yuan, J. X. Shi, and Ya Liang Wang. "Research on Field-Induced Oxidation Processing Technology by Contact-Mode AFM in Ambient Air." In Advances in Machining & Manufacturing Technology VIII, 254–58. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-999-7.254.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Stewart, Gina. "Dry Cleaning with Liquid Carbon Dioxide." In Green Chemistry Using Liquid and Supercritical Carbon Dioxide. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195154832.003.0019.

Full text
Abstract:
The process of cleaning one item invariably involves making something else dirty. Whether that something else is an organic or halogenated solvent, soapy water, or a rag, we seldom address the dirtying that accompanies any cleaning process. If we are to achieve environmentally benign cleaning, we must look at the life cycle of solvents employed for cleaning, including the potential for recycling, reuse, or release into the environment. Truly “green” cleaning processes not only minimize the amount of waste generated; but also they prevent the dispersal of that waste into large amounts of solvent, water, soil, or air. Dense-phase carbon dioxide is a great cleaning solvent from a pollution-prevention viewpoint. By-product CO2 generated by other industrial processes can be captured, so it is not necessary to generate CO2 specifically for cleaning. Spills of CO2 will not contaminate groundwater or create a need for soil remediation. Carbon dioxide even has advantages for the work environment, since no chronic, harmful effects are known from repeated inhalation of low concentrations of CO2. The barriers to using CO2 as a cleaning solvent have centered around two issues: the expense of high-pressure equipment and the poor solubility of many contaminants in CO2. Micell Technologies, Inc., based in Raleigh, NC, has addressed the equipment issue by using liquid CO2 just below ambient temperature (∼18–22 °C) and vapor pressure (∼50 bar). The equipment needed to contain this pressure is considerably less expensive than that needed for supercritical CO2 processes. As for the second barrier, Micell has surfactant packages that enhance the ability of CO2 to dissolve many contaminants commonly found on clothes or on metal parts. Micell is in the process of designing and bringing to market integrated CO2 solutions, including equipment and appropriate chemistries, to replace the organic solvents or water traditionally used in garment dry cleaning, metal degreasing, and textile processing. Dry cleaning is a bit of a misnomer, in that clothes are cleaned in a liquid solvent. “Dry” simply means that exposure of a garment, such as a wool suit or silk blouse, to water is minimized to prevent damage to hydrophilic fibers.
APA, Harvard, Vancouver, ISO, and other styles
3

Zawadzki, Tomasz, Slawomir Nikiel, and Gareth W. Young. "Prototyping VR Training Tools for Healthcare With Off-the-Shelf CGI." In Advances in Medical Technologies and Clinical Practice, 160–86. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8790-4.ch008.

Full text
Abstract:
Cloud computing, big data, wearables, the internet of things, artificial intelligence, robotics, and virtual reality (VR), when seamlessly combined, will create the healthcare of the future. In the presented study, the authors aim to provide tools and methodologies to efficiently create 3D virtual learning environments (VLEs) to immerse participants in 3600, six degrees of freedom (6DoF) patient examination simulations. Furthermore, the authors will discuss specific methods and features to improve visual realism in VR, such as post-processing effects (ambient occlusion, bloom, depth of field, anti-aliasing), texturing (normal maps, transparent, and reflective materials), and realistic lighting (spotlights and custom lights). The presented VLE creation techniques will be used as a testbed for medical simulation, created using the Unity game engine.
APA, Harvard, Vancouver, ISO, and other styles
4

Kung, Edward, and Alan J. Lesser. "Preparation and Studies of Polymer/Polymer Composites Prepared Using Supercritical Carbon Dioxide." In Green Chemistry Using Liquid and Supercritical Carbon Dioxide. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195154832.003.0015.

Full text
Abstract:
Because of the recent emphasis on green chemistry, there has been interest in using supercritical carbon dioxide (sc CO2) as a solvent or swelling agent to aid in polymer processing and polymer chemistry (Adamsky and Beckman, 1994; DeSimone et al., 1992; Hayes and McCarthy, 1998; Kung et al., 1998; Mistele et al., 1996; Romack et al., 1995; Watkins and McCarthy, 1995). Supercritical CO2 is a very weak solvent for most polymers (some fluoropolymers and silicones are exceptions); however, it swells most polymers and dissolves many small molecules (Berens and Huvard, 1989). The density of a supercritical fluid (SCF), and thus its solvent strength, is continuously tunable as a function of temperature or pressure up to liquidlike values. This provides the ability to control the degree of swelling in a polymer as well as the partitioning of small-molecule penetrants between a swollen polymer phase and the fluid phase. The low viscosity and zero surface tension of SCFs allows for fast transfer of penetrants into swollen polymers. The lack of vapor/liquid coexistance in SCFs allows the sorption to proceed without the penetrant solution wetting the substrate surface. Since most of the common SCFs are gases at ambient conditions, the removal and recovery of the solvent from the final product is extremely facile. All of these factors aid in a new method we have developed for preparing polymer composites. This method involves the absorption of a supercritical solution of a monomer, initiator, and CO2 into a solid polymer substrate and subsequent thermal polymerization of the monomer to yield a composite system of the two polymers. We have focused on radical polymerization of styrene within various solid semicrystalline polymer substrates (Hayes and McCarthy, 1998; Kung et al., 1998; Watkins and McCarthy, 1995). Table 10.1 lists a number of systems that we have studied to make polymer–polystyrene composites. The method for preparing the polymer blends listed in Table 10.1 involves the soaking of the substrate polymer in a supercritical solution of styrene, a thermal radical initiator, and CO2 at a temperature where the initiator decomposes very slowly (half-lives of hundreds of hours).
APA, Harvard, Vancouver, ISO, and other styles
5

"be detected specifically, which is possible for sane groups of odorants (thiols or mercaptans, sulphides, amines) with specific GC-detectors. Spe­ cific detectors are available for haloganted compounds, sulphur-, phosphor-and nitrogen compounds. Figure 4 shews the analysis of the sulphur-ccmpounds produced by the acidic decomposition of phosphate-rock and causing the typi­ cal smell of fertilizer plants. Another approach is to aim at selective concentration methods. Indeed odour problems are caused by a limited number of compounds, on rather a li­ mited number of classes of compounds, mentioned in figure 5. For most odour nuisance problems, chemical plants, refineries, live­ stock production, food processing, rendering, water purification plants etc., the compounds responsible for the odour are known. So chemical analysis of the odour can be limited to these odorants, and selective concentrating techniques can be used. Selective concentrating methods are based on speci­ fic absorption techniques, using particular chemical reactions of odorant classes. Semet imes several absorption methods have to be used in order to describe the odour problem, thus increasing the labor cost of the analysis. On the other hand absorption methods allow better quantitative results. Se­ lective absorption of odorants from air produces a far less complex mixture. We developed or are developing several of these methods for aldehydes, amines, acids, thiols etc. Carbonyl ccnpounds for instance can be trapped by absorption in a rea­ gent solution containing 2,4-dinitrcphenylhydrazine and hydrogen chloride. Details of this method are extensively described elsewhere (8). The prin­ ciple of the method is that the carbonyl ccnpounds, in case of rendering plant emission the aldehydes, react with the 2,4-dinitrophenylhydrazine and form 2,4-dinitrophenylhydrazones (2,4-DNPH's) according to the scheme. These 2,4-dinitrophenylhydrazones have seme interesting properties. It are cristalline caipounds so that after extract of the 2,4-DNPH's fran the reagens, they can be concentrated by evaporation of the solvent without losing product. Besides these caipounds shown intense absorption of UV-light (X 356 nm) and so they can easily be detected with an UV-detec-tor. These properties make the 2,4-DNPH's particularly suitable for HPDC-analyse. This methods is used since seme time. A chranatogram is given in figure 6 and results of the quantitative determination of carbonyl com­ pounds in different situations are given in table 2. For amines absorption in an acid solution, or preferably adsorption onto an acid ion exchange column (acidified divinylbenzene-styrenesulfo-nic acid copolymer) is used. 10-50 1 of ambient air is sent over*a wet 100nnix3irmI.D. column; the ion exchange polymer is put into a vial, made alkaline and the water solution is analysed on packed Carbowax-KDH GC-column with a thermionic selective detector (TSD), which is specific for nitrogen- and phosphorus-catpounds. Trimethylamine is detected easi­ ly at 1 ppb. Aibids can be absorbed specifically in an alkaline impringer, which is extracted with ether after acidification to pH 2. This method was used for rendering plant emissions, shewing a series of linear and branched." In Odour Prevention and Control of Organic Sludge and Livestock Farming, 170. CRC Press, 1986. http://dx.doi.org/10.1201/9781482286311-76.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Ambient air processing"

1

Bulegenov, D., Sayara Saliyeva, A. Sekerbayeva, and Sergey Spotar. "Application of REA-method to a convective drying of apple rings at ambient temperature." In the 4th International Food Operations and Processing Simulation Workshop. CAL-TEK srl, 2018. http://dx.doi.org/10.46354/i3m.2018.foodops.006.

Full text
Abstract:
This study focuses on the convective drying of apple rings without any extra-heating of the processing ambient air. The lumped reaction engineering approach (REA) model has been employed to determine the rate of drying for the apple rings under forced convection considered as a normal processing regime. The algorithm implies determination the activation energy curve from the accurate ‘reference’ measurements of the drying rate under natural convection conditions. The required for the model implementation mass transfer coefficients for the apple ring samples under natural and forced conditions were obtained in the series of customized experiments. The study does extend the application of REA for the limiting simplest case of convective drying of thick samples under ambient temperature condition."
APA, Harvard, Vancouver, ISO, and other styles
2

Bojja, Polaiah, and Vivith Kumar Karumuri. "Development and evaluation of pollution forecasting model using soft-computing methods for PM10 and SO2 in Ambient Air." In 2016 International Conference on Wireless Communications, Signal Processing and Networking (WiSPNET). IEEE, 2016. http://dx.doi.org/10.1109/wispnet.2016.7566323.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Park, Beom S., Ajay P. Malshe, William D. Brown, and Kiran P. Adhi. "Reactive Processing of CVD Diamond Substrates in Liquid Ambient by Second Harmonic of Nd:YAG Laser." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1814.

Full text
Abstract:
Abstract The objective of this investigation is to study the effects of laser radiation at 532 nm, the second harmonic of Q-switched Nd:YAG laser on polycrystalline diamond in air and liquid (water and H2O2) ambient. Phase changes and laser-induced stress due to structural deformations are analyzed using Raman spectroscopy. Surface morphology of the processed region of diamond and formation of microcracks is studied by scanning electron microscopy. Drilling of diamond substrates, in water ambient, is observed to be faster, 1.364 times, than that in the air. Enhancement in the drilling speed and uniformity of the drilled hole are discussed from the view of presence of reactive hydrogen and / or oxygen radicals liberated during the interaction of laser radiation with the diamond surface in water ambient.
APA, Harvard, Vancouver, ISO, and other styles
4

Omion, Osemanre Ossy, Chioma Maduewesi, and Emeke Chukwu. "A Novel Approach to Predicting Combustion Emission Using Ambient Air Quality Parameters in Onshore Eastern Nigeria." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/207139-ms.

Full text
Abstract:
Abstract The paper aims to estimate the tCO2e from flare stack sites in the Eastern zone of Nigeria and review air monitoring done at the flare sites with the objective of establishing a model for gas tCO2e emission and gaseous pollutants. It focuses on the South-Eastern region of Nigeria where oil and gas production are being carried out (Imo and Abia states). It zero-in on the hydrocarbon processing and handling facilities (flowstation) and the gas flared volumes. The study was carried out using representative data from an onshore flowstation in Eastern Nigeria. The data consist of gas flared volumes from year 2013-2017 and ambient gaseous emission from air quality report done on the same location. Univariate regression and correlation using Excel were carried out on yearly average ambient air quality parameters (VOC, NOx, CO, SOx, CH4, SPM, NH3, H2S) to check the statistical significance of each parameter as an independent variable and calculated tCO2e as the dependent variable. Excel Muti-variate linear regression method was then used to generate a predictive model for tCO2e and gaseous emission parameters. It presented a relationship between the emission from flared gas and air quality index.
APA, Harvard, Vancouver, ISO, and other styles
5

Dowding, C. F., and J. Lawrence. "Analysis of the excimer laser ablation characteristics of bisphenol a polycarbonate in ambient air and under thin film laminar flow water immersion." In ICALEO® 2008: 27th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2008. http://dx.doi.org/10.2351/1.5061313.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Voevodin, A. A., and J. S. Zabinski. "Laser Surface Processing of “Chameleon” Coatings for Aerospace Tribology." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63489.

Full text
Abstract:
Adaptive solid lubricants were developed to provide friction and wear reduction in aerospace environments such as ambient humid air, vacuum, or dry nitrogen (storage and on ground testing). Achieving high durability and long life requires solid lubricant reservoirs near the tribological surface. Reservoirs were fabricated using precision laser processing to generate arrays of micrometer-sized holes with well-controlled size, location, and density on the surface of hard ceramic coatings applied to steel substrates. Solid lubricants based on dichalocogenides and carbon were applied by burnishing and sputtering to the laser treated surfaces. Sliding friction tests were performed against steel balls in environments with different humidity. The result indicates that there is an optimum reservoir surface density, where the life of the solid lubricant is improved by an order of magnitude. The laser-processed reservoirs enable coating operation in variable environments.
APA, Harvard, Vancouver, ISO, and other styles
7

De Lucia, Maurizio, Rinaldo Bronconi, and Ennio Carnevale. "Performance and Economic Enhancement of Cogeneration Gas Turbines Through Compressor Inlet Air Cooling." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-071.

Full text
Abstract:
Gas turbine air cooling systems serve to raise performance to peak power levels during the hot months when high atmospheric temperatures cause reductions in net power output. This work describes the technical and economic advantages of providing a compressor inlet air cooling system to increase the gas turbine’s power rating and reduce its heat rate. The pros and cons of state-of-the-art cooling technologies, i.e., absorption and compression refrigeration, with and without thermal energy storage, were examined in order to select the most suitable cooling solution. Heavy-duty gas turbine cogeneration systems with and without absorption units were modeled, as well as various industrial sectors, i.e., paper and pulp, pharmaceuticals, food processing, textiles, tanning, and building materials. The ambient temperature variations were modeled so the effects of climate could be accounted for in the simulation. The results validated the advantages of gas turbine cogeneration with absorption air cooling as compared to other systems without air cooling.
APA, Harvard, Vancouver, ISO, and other styles
8

Neyhouse, Jeffrey R., Jose M. Aurrecoechea, J. Preston Montague, and John D. Lilley. "Cast Iron-Nickel Alloy for Industrial Gas Turbine Engine Applications." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68837.

Full text
Abstract:
Austenitic ductile iron castings have traditionally been used for gas turbine exhaust components that require castability, good machinability, low thermal expansion, and high strength at elevated temperatures. The achievement of optimum properties in austenitic ductile irons hinges on the ability of the foundry to produce nodular graphite in the microstructure throughout the component. In large, complex components, consistently producing nodular graphite is challenging. A high-nickel steel alloy that is suitable for sand castings has been recently developed for industrial gas turbine engine applications. The alloy exhibits similar mechanical and physical properties to austenitic ductile irons, but with improved processability and ductility. This alloy is weldable and exhibits no secondary graphite phase. This paper presents the results of a characterization program conducted on a 35% nickel, high-alloy steel. The results are compared with an austenitic ductile iron of similar composition. Tensile and creep properties from ambient temperature to 760°C (1400°F) are included, along with fabrication experience gained during the manufacture of several sand cast components at Solar Turbines Incorporated. The alloy has been successfully adopted for gas turbine exhaust system components and other applications where austenitic ductile irons have traditionally been utilized. The low carbon content of austenitic steels permits improved weldabilty and processing characteristics over austenitic ductile irons. The enhancements provided by the alloy indicate that additional applications, as both austenitic ductile iron replacements and new components, will arise in the future.
APA, Harvard, Vancouver, ISO, and other styles
9

Kim, Wookyung, Shiling Zhang, Paul Palies, Jeffrey Cohen, Scott Liljenberg, and Donald Hautman. "The Behavior of Liquid Fuel Sprays in Acoustically-Forced Air Swirler Flows." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68922.

Full text
Abstract:
The effects of air flow forcing on fuel spray characteristics in a premixing swirler were assessed using ambient-pressure experiments and CFD (LES) analyses. Experimental measurements were performed using phase-locked Phase-Doppler Interferometry on two different swirler/mixer designs. The CFD analyses employed an advanced spray modeling technique to track the surface of the liquid fuel. The swirler designs chosen were representative of advanced low-emissions combustor concepts that emphasize thorough fuel/air mixing for Jet-A fuel. Significant post-processing of the results was performed in order to extract the response of the fuel spray mass flow rate fluctuations and fuel/air ratio to acoustic forcing. The results demonstrated that i) acoustic air forcing did not significantly change the atomization process, but did influence the unsteady transport of fuel droplets within the swirler flow field, ii) the level of fuel mass flow fluctuation was higher for one swirler and the level of fuel/air ratio fluctuations was higher for the other swirler and iii) the different behaviors between the two swirlers are primarily caused by the discrepant alignment of fuel and air distribution and the dissimilar droplet Stokes number which governs the unsteady transport. CFD results were interrogated to help understand the root causes of the observed phenomena. These showed that, for the swirler in which fuel mass flow fluctuations were observed, the swirl number was modulated by the acoustic forcing.
APA, Harvard, Vancouver, ISO, and other styles
10

Lukachko, Stephen P., Ian A. Waitz, Richard C. Miake-Lye, and Robert C. Brown. "Engine Design and Operational Impacts on Particulate Matter Precursor Emissions." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-69112.

Full text
Abstract:
Aircraft emissions of trace sulfur and nitrogen oxides contribute to the generation of fine volatile particulate matter (PM). Resultant changes to ambient PM concentrations and radiative properties of the atmosphere may be important sources of aviation-related environmental impacts. This paper addresses engine design and operational impacts on aerosol precursor emissions of SOx and NOy species. Volatile PM formed from these species in the environment surrounding an aircraft is dependent on intra-engine oxidation processes occurring both within and downstream of the combustor. This study examines the complex response of trace chemistry to the temporal and spatial evolution of temperature and pressure along this entire intra-engine path, after combustion through the aft combustor, turbine, and exhaust nozzle. Low-order and higher fidelity tools are applied to model the interaction of chemical and fluid mechanical processes, identify important parameters, and assess uncertainties. The analysis suggests intra-engine processing is inefficient. For engine types in-service in the large commercial aviation fleet, mean conversion efficiency (ε) is estimated to be 2.8% to 6.5% for sulfate precursors and 0.3% to 5.7% for nitrate precursors at the engine exit plane. These ranges reflect technological differences within the fleet, the variation in oxidative activity with operating mode, and modeling uncertainty stemming from variance in rate parameters and initial conditions. Assuming sulfur-derived volatile PM is most likely, these results suggest emission indices of 0.06–0.13 g/kg-fuel assuming particles nucleated as 2H2SO4·H2O for a fuel sulfur content of 500 ppm.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Ambient air processing' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography