Academic literature on the topic 'Incomplete combustion'

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Journal articles on the topic "Incomplete combustion"

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Lee, Dae Hoon, Dae-Eun Park, Euisik Yoon, and Sejin Kwon. "A MEMS Piston-Cylinder Device Actuated by Combustion." Journal of Heat Transfer 125, no. 3 (May 20, 2003): 487–93. http://dx.doi.org/10.1115/1.1565095.

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Combustion measurement in a cylindrical micro combustor, the construction procedure and test run of a MEMS reciprocating device are described. The sizing of the MEMS device was based on the findings of combustion measurements. Thermodynamic analysis of the pressure measurement resulted in available work up to 2.4 Joules in a combustor height of 2 mm and more with combustion efficiency of 0.6∼0.7. With combustor height less than 2 mm, combustion was incomplete due to excessive heat loss to the wall. In order to achieve the chamber height imposed by the combustion measurement, a fabrication process and wafer material that allow deeper etching was used.
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Kagan, L., and G. Sivashinsky. "Incomplete combustion in nonadiabatic premixed gas flames." Physical Review E 53, no. 6 (June 1, 1996): 6021–27. http://dx.doi.org/10.1103/physreve.53.6021.

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Oluwoye, Ibukun, Mohammednoor Altarawneh, Jeff Gore, and Bogdan Z. Dlugogorski. "Products of incomplete combustion from biomass reburning." Fuel 274 (August 2020): 117805. http://dx.doi.org/10.1016/j.fuel.2020.117805.

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Musaeva, D., and M. Eshmuhamedov. "THE MECHANISM OF THE CONVERSIONS OF THE PRODUCTS OF THE INCOMPLETE COMBUSTION ON POLIMETALL ADSORBTIONKATALISIS- CHEMOSORBCION SYSTEM." Technical science and innovation 2019, no. 2 (August 2, 2019): 76–83. http://dx.doi.org/10.51346/tstu-01.19.2.-77-0023.

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In article is considered possibility of the catalytic conversion and chemosorption of the products of the incomplete combustion on actuated oxides alkaline, alkaline earth and amphoteric metal and metal with connecting valence sufficient as iron and manganese, bring about forming the join metal at peelings of the gas flow from products of the incomplete combustion. It is determined that in process chemosorption is formed join metal, which is accumulated in time sorption-catalytic system. The studied mechanism of the oxidation of the products of the incomplete combustion on oxides alkaline, alkaline earth, amphoteric metal and metal with connecting valence, as iron and manganese containing systems. Physics-chemical and spectral analysis is installed that, at xemosorbtion of the products of the incomplete combustion ion Mn4+, Mn3+ and Fe3+ moves over to undermost valence of the condition and form to salts. It is revealed that clear industrial gas surge from products of the incomplete combustion on easy porous have eaten metallic oxides with manganese by concoction is accompanied simultaneous increase being kept in him metal in the manner of metal of the organic join
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Chand, Dharmahinder Singh, Daamanjyot Barara, Gautam Ganesh, and Suraj Anand. "Comparison of Efficiency of Conventional Shaped Circular and Elliptical Shaped Combustor." MATEC Web of Conferences 151 (2018): 02002. http://dx.doi.org/10.1051/matecconf/201815102002.

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There have been concerted efforts towards improving the fuel efficiency of the jet engines in the past, with an aim of reducing the incomplete combustion. The process of combustion in a jet engine takes place in the combustor. A study was conducted for enhancement of air-fuel mixing process by computational analysis of an elliptically shaped combustor for a gas turbine engine. The results of computational analysis of an elliptical shape combustor were compared with a circular shape combustor used in gas turbine engines with a identical cross sectional area. The comparison of the computationally derived parameters of the two combustors i.e. temperature, pressure, and velocity are studied and analyzed. The study intends towards the comparison of the combustion efficiencies of the circular and elliptically shaped combustors. The combustion efficency of elliptical chamber is found to be 98.72% at the same time it was observed 56.26% in case of circular type combustor.
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Castro, Zamir Sánchez, Hugo Reinel García Bernal, and Oscar Andrés Mendieta Menjura. "Efecto del precalentamiento del aire primario y la humedad del bagazo de caña de azúcar durante la combustión en lecho fijo." Corpoica Ciencia y Tecnología Agropecuaria 14, no. 1 (May 24, 2013): 5. http://dx.doi.org/10.21930/rcta.vol14_num1_art:263.

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<p>Los hornos utilizados para la elaboración de panela presentan pérdidas energéticas debido a una combus­tión incompleta del bagazo de caña de azúcar y al calor sensible en los gases de chimenea. Durante el proceso de producción de panela, el bagazo de caña de azúcar se utiliza como combustible, con fracciones másicas de humedad entre 30% y 50%, las cuales afectan el rendi­miento de la combustión de una biomasa en lecho fijo. Gracias a que el precalentamiento del aire disminuye el tiempo de secado, su implementación en muchos sistemas de combustión de biomasa ha incrementado la eficiencia del proceso. Por tanto, en la presente investigación se estudió la influencia del contenido de humedad y el pre­calentamiento del aire primario sobre la temperatura, la composición del gas y la tasa de combustión, mediante un diseño experimental factorial mixto 3x2. Los resul­tados demostraron que el aumento en la humedad del bagazo de caña reduce la tasa de combustión y la con­versión de carbono a CO2, y por tanto, el rendimiento del proceso. Cuando se precalentó el aire primario hasta una temperatura de 120 ºC, la tasa de combustión au­mentó, sin embargo sólo significó un incremento en el rendimiento de la combustión para una fracción másica de humedad de 30%.</p><p><strong>Effect of primary air preheating and moisture sugarcane bagasse during fixed bed combustion</strong></p><p>Furnaces used to making jaggery have energy losses due to incomplete combustion of sugarcane bagasse and sensible heat in the flue gases. During jaggery production process, sugarcane bagasse is used as fuel, with mass fractions of humidity between 30% and 50%, which affect the combustion efficiency of a biomass in a fixed bed. Because the air preheating decreases the drying time, its implementation in many biomass combustion systems increases process efficiency. Therefore, in this investigation we studied the influence of the moisture content and the preheating of the primary air on the combustion of bagasse in a fixed bed furnace, by analyzing the profiles of temperature and concentration of the combustion gas. Results showed that increasing in bagasse moisture reduces the rate of combustion and conversion of carbon to CO2, diminishing the yield of process. When the primary air is preheated to a temperature of 120 ºC, the combustion rate increased, however, only meant an increase in combustion efficiency to a mass fraction of 30% humidity.</p>
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Smith, Kirk R. "Incomplete Combustion: One of the World’s Biggest Killers." QScience Proceedings 2012, no. 3 (May 14, 2012): 4. http://dx.doi.org/10.5339/qproc.2012.mutagens.3.4.

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Mattson, Bruce, Trisha Hoette, and Michelle S. Applebee. "Incomplete Combustion of Hydrogen: Trapping a Reaction Intermediate." Journal of Chemical Education 84, no. 10 (October 2007): 1668. http://dx.doi.org/10.1021/ed084p1668.

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Cudahy, James J., and Richard W. Helsel. "Removal of products of incomplete combustion with carbon." Waste Management 20, no. 5-6 (October 2000): 339–45. http://dx.doi.org/10.1016/s0956-053x(99)00335-9.

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Vitz, Ed. "Paradoxes, Puzzles, and Pitfalls of Incomplete Combustion Demonstrations." Journal of Chemical Education 77, no. 8 (August 2000): 1011. http://dx.doi.org/10.1021/ed077p1011.

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Dissertations / Theses on the topic "Incomplete combustion"

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Redford, Tim. "Effects of incomplete fuel-air mixing on the performance characteristics of mixed compression, shock-induced combustion ramjet, shcramjet, engines." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0010/MQ34109.pdf.

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Boman, Christoffer. "Particulate and gaseous emissions from residential biomass combustion." Doctoral thesis, Umeå : Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-501.

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de, Rooy S. C. "Improved efficiencies in flame weeding." Lincoln University, 1992. http://hdl.handle.net/10182/18.

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Possible areas of improving the efficiencies of the Lincoln University flame weeder are identified and investigated. The Hoffmann burner initially used in the Lincoln University flame weeder was found not to entrain sufficient air to allow complete combustion of the LPG used. A new burner, the Modified Lincoln University burner, was designed to improve the entrainment of air. Results show that the new design entrained sufficient air to theoretically allow complete combustion of the LPG, and this resulted in a 22.7% increase in heat output per Kg of LPG used over the Hoffmann burner. Temperature x time exposure constants required to kill weeds 0 - 15, 15 - 30, and 30 - 45 mm in size, were found to be respectively 750, 882, and 989 degrees Celsius.Seconds. These constants can be used to calculate the maximum speed of travel an operator can use a flame weeder at, once the temperature profile underneath its shields are established at various travel speeds, and therefore ensure that the flame weeder is used at its maximum efficiency. The constants can also be used to establish the cost efficiency of any flame weeder (in $/Ha), depending on the size of the weeds to be treated. The materials and methods used in establishing the temperature x time exposure constants can be used to establish the temperature x time exposure constant of any weed species at any size.
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Hsu, Sheng-Yen. "Flame Spread and Extinction Over Solids in Buoyant and Forced Concurrent Flows: Model Computations and Comparison with Experiments." Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1238144733.

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Thesis (Ph.D.)--Case Western Reserve University, 2009
Abstract Department of Mechanical and Aerospace Engineering Title from PDF (viewed on 14 April 2009) Available online via the OhioLINK ETD Center
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Sheng-Yen, Hsu. "Flame Spread and Extinction Over Solids in Buoyant and Forced Concurrent Flows: Model Computations and Comparison with Experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1238144733.

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Lin, Wei Jing, and 林暐淨. "Numerical Simulation of Gas Water Heater Incomplete Combustion due toBalcony Clothes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5u9hc2.

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碩士
國立聯合大學
環境與安全衛生工程學系碩士班
106
Every year when the winter cold current strikes, the use or improper setting of the gas water heaters causes frequent carbon monoxide poisoning incidents throughout Taiwan. However, the main reason for the frequent occurrence of carbon monoxide poisoning incidents is that, in addition to the doors and windows are closed, which makes the poor ventilation of the balcony, and the thick clothes on the balcony is another factor that causes the gas water heater to burn incompletely. Based on the general interior design of Taiwan's residential buildings, this study establishes the physical model of the clothes drying balcony and the interior, and uses the FDS fire simulation software to express the degree of clothing density on the wall opening of the daughter, and explores the proportion of the opening to the entire wall. The parameters of the speed inlet adjust the wind speed, the opening and closing of the balcony door, and the height of the water heater of the model, and analyze the diffusion path and concentration change of carbon monoxide. The results show that: (1) changing the opening degree when the speed inlet is zero does not have much influence on the carbon monoxide diffusion. The power of carbon monoxide diffusion is its own diffusion ability, and the closing of the balcony door can effectively prevent carbon monoxide. The accumulation of indoor space, while the balcony space is in a high concentration state. (2) The gas diffusion at a height of 1.5 meters at the water heater will be more uniform than that of the water heater at a height of 2 meters; increasing the opening at a wind speed will accelerate the diffusion of carbon monoxide concentration in the indoor space. After the wind speed reaches a certain level, Excessive opening will cause carbon monoxide to reach steady state more quickly; (3) It can be found from the figure that in the case of wind speed, increasing the opening to the side is more effective than increasing the opening height of the lower breathing zone.
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Yungchung, Chen, and 陳永忠. "Formation and Destruction of Products of Incomplete Combustion during the Post-Combustion Region in a Laboratory Scale Spouted Bed Incinerator." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/03443211580619385786.

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碩士
國立屏東科技大學
環境工程與科學系
88
The purpose of this research is to investigate the formation and destruction of the products of incomplete combustion (PICs) during the post-combustion region. A laboratory scale spouted bed incinerator is employed to simulate the hazardous incineration process and obtain some fundamental data. The key operating parameters related to the performance of an incinerator are investigated under the heterogeneous conditions. The auxiliary vortex air was introduced from the side probe above the bed surface and the inorganic chloride source (i.e. KCl) was fed into the combustor from the freeboard region. The flue gas sample was induced from the side probe of the reactor with constant flow rate for 45-miniutes. The flue gas sampling train consists of a glass filter and an impinger. The glass filter is used to remove fine particles. The impinger with CH2Cl2 solution, captured the organic compounds through absorption. In order to enhance condensation, the impinger was submerged in an ice bath. The steps of the sample preparation for analysis are as follows: soxhlet extraction, vacuum condensation, and concentration. Analyses for PICs trap samples are performed on a HP 5890 gas chromatograph (GC) equipped with a HP 5972 mass selective detector (MSD) and flame ionization detector (FID). A well-developed computation model CHEMKIN-II is adopted to estimate the trend of PICs concentration. The primary results of this study are summarized as follows: (1) In quantitative analysis, the different detector can present the different concentration dependent on the characteristics of compounds. (2) The temperature of post-combustion region is decreased in downstream of combustor with adding the auxiliary vortex airflow and KCl. However the oxygenated species concentration are increased like cresol but naphthalene have less changed. (3) The upper four ring polycyclic aromatic hydrocarbons (PAHs) were not found in this system. With adding KCl the organic chloride compounds are like chlorobenzene or chlorophenol hadn’t found. (4) Inorganic chloride source can inhibit the destruction of toluene in both experimental result and model simulation. (5) The toluene’s values both in experimental result and model simulation are very close at long residence time in homogeneous model simulation, while other compounds did not show the same results. The discrepancy between the experimental results and the model predictions is possible elaborated while heterogeneous effects dominate the experimental situation. It is feasible that by adjusting the temperature of model and adding radical quenching steps in homogeneous combustion mechanism would compose heterogeneous combustion mechanism. (6) The model simulation can offer a predictive trend of formation and destruction of the PICs during the post-combustion region.
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Brukh, Roman. "Experimental and modeling studies of formation of products of incomplete combustion and chlorocarbon incineration." Thesis, 2003. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2003-019.

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Tai, Chih-Ching, and 戴志青. "Numerical Simulation of Indoor Carbon Monoxide Accumulation Induced by Incomplete Combustion of Gas Water Heater." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/38563866699928196400.

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碩士
國立聯合大學
環境與安全衛生工程學系碩士班
101
Carbon monoxide poisoning was induced by incomplete combustion of gas water heater has been becoming a common occurrence in the winter in Taiwan. People are inclined to close their transom tightly to keep the cold air out, which results the ventilation is bad. This study were carried out different transom of openings percentage to simulation the gas incomplete combustion induced by indoor carbon monoxide accumulation and diffusion the phenomenon. The results show that transom indeed make the window adjacent domain concentration slightly lower, but transom area accounted wall area ratio less than 1/4 of proportion during 2 to 3 hours. The carbon monoxide concentration may accumulate to more than 200ppm, which was high enough to cause breathing difficulty, heart failure, and even death. This case shows, that doors are closed, with no other opening to connect the indoor room, and as long as the position away from the water heater, although leaving 5 cm height at the slit, its spread to the interior room of carbon monoxide concentration wasn't enough to induced by human poisoning.
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Tsai, Jin Yu, and 蔡景裕. "Study the Formation and Destruction of the Products of Incomplete Combustion in a Spouted Bed Incinerator." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/94685087259984130461.

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碩士
國立屏東科技大學
環境工程與科學系
89
Incineration is recognized as one of the most efficient processes to treat and dispose the waste stream. An obvious advantage of incineration is the large mass and volume reduction. The oxidation of hydrocarbon contents in the waste stream is a very complex process involving both propagation and chain-branching reactions. The higher carbon atom number of the hydrocarbon, the more complicated is the process. The major concern regarding air pollutant emissions from hazardous waste incineration system is to form some organic products of incomplete combustion (PICs). Some of them are thermally stable and suspected of being mutagenic and carcinogenic to human. The performance of incinerator was normally evaluated in terms of combustion efficiency (CE) and destruction and removal efficiency (DRE). However, some PICs formation can’t associate with the quantitative values of CE and DRE. The objective of this research is to investigate the key operating parameters related to the formation and destruction of PICs at different locations from the flue gas stream. under the heterogeneous conditions. The spouted bed is characterized as a special type of fluidized bed. Since circulating bed medium can act as a mobile heat exchanger between products and reactants, the spouted bed combustor is especially attractive for the incineration of low heat value fuel in laboratory research. In order to take samples from combustor and measure temperature inside bed region, three sampling probes were built at the side of the reactor. Two sampling cross, consisting of four ball joint ports which enable the insertion of probes and simultaneously sampling from different radial locations. Analyses for DRE and PICs are performed on a HP 5890 gas chromatograph coupled to a HP 5972 mass selective detector (GC/MSD). The exhaust flues gas compositions are also taken periodically and monitoring via an on-line analysis system which includes the volatile organic sampling train (VOST) connecting directly with GC/FID. The formation and destruction of the aromatic PICs in the post-combustion region for burning toluene and heptane was investigated to evaluate the emission trends. On the correlations of the CE, DRE and PICs emission levels from the combustion of toluene and heptane were observed in this study. The concentration of most PICs increases first, then decrease with increasing residence time or distance from the bed surface. Benzaldehyde appeared to be the most predominant species of oxygenated aromatics. It is obvious that benzene is derived from toluene losing side, and benzaldehyde is derived from benzene oxidation.
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Books on the topic "Incomplete combustion"

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Wong, Chung-Nin Channy. A standard problem for HECTR-MAAP comparison: Incomplete burning. Washington, DC: Division of Systems Research, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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Schumacher, Jurgen. Effects of incomplete fuel/air mixing on the performance characteristics of hypersonic shock-induced combustion ramjets (shcramjets). [Downsview, Ont.]: University of Toronto, Institute for Aerospace Studies, 1995.

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Schumacher, Jürgen. Effects of incomplete fuel/air mixing on the performance characteristics of hypersonic shock-induced combustion ramjets (schramjets). Ottawa: National Library of Canada, 1995.

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Redford, Tim. Effects of incomplete fuel-air mixing on the performance characteristics of mixed compression, shock-induced combustion ramjet (shcramjet) engines. Toronto]: Dept. of Aerospace Science and Engineering, University of Toronto, 1998.

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Redford, Tim. Effects of incomplete fuel-air mixing on the performance characteristics of mixed compression, shock-induced combustion ramjet (shcramjet) engines. Ottawa: National Library of Canada, 1998.

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Book chapters on the topic "Incomplete combustion"

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Adebona, B., A. Shafagati, E. J. Martin, and R. C. Chawla. "Laboratory Evaluation of Products of Incomplete Combustion Formed from Burning of Agricultural Product Bags." In ACS Symposium Series, 63–77. Washington, DC: American Chemical Society, 1992. http://dx.doi.org/10.1021/bk-1992-0510.ch006.

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Atkins, Peter. "Burns Night: Combustion." In Reactions. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199695126.003.0007.

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Burning, more formally combustion, denotes burning in oxygen and more commonly in air (which is 20 per cent oxygen). Combustion is a special case of a more general term, ‘oxidation’, which originally meant reaction with oxygen, not necessarily accompanied by a flame. The rusting of iron is also an oxidation, but we don’t normally think of it as a combustion because no flame is involved. Oxidation now has a much broader meaning than reaction with oxygen, as I shall unfold in Reaction 5. For now, I shall stick to combustion itself. To achieve combustion, we take a fuel, which might be the methane, CH4, 1, of natural gas or one of the heavier hydrocarbons, such as octane, C8H18, 2, that we use in internal combustion engines, mix it with air, and ignite it. The outcome of the complete combustion of any hydro-carbon is carbon dioxide and water but incomplete combustion can result in carbon monoxide and various fragments of the original hydrocarbon molecule. All combustions are ‘exothermic’, meaning that they release a lot of energy as heat into the surroundings. We use that energy for warmth or for driving machinery. Another example of an exothermic combustion is provided by the metal magnesium, which gives an intense white light as well as heat when it burns in air. A part of the vigour of this reaction is due to the fact that magnesium reacts not only with oxygen but also with nitrogen, the major component of air. You should be getting a glimpse of the broader significance of the term ‘oxidation’ in the sense that the reaction need not involve oxygen; in magnesium’s case, nitrogen can replace oxygen in the reaction. Magnesium foil was used in old-fashioned photographic flashes and in fireworks. The latter now mostly use finely powdered aluminium, which is much cheaper than magnesium and reacts in much the same way. In what follows you could easily replace aluminium with magnesium if you want to think fireworks. For the whole of the following discussion you need to be familiar with oxygen, O2, 3, a peculiar molecule in several respects.
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Fehintola Awopeju, Olayemi. "Health Effect of Biomass Fuel Smoke." In Environmental Emissions. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.94611.

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Almost half of the world population rely on solid (biomass fuel and coal) for cooking, heating and lightning purpose. The resultant exposure to fine particulate matter from household air pollution is the seventh-largest risk factor for global burden of disease causing between 2.6 and 3.8 million premature deaths per year. The health effect ranges from cardiovascular, respiratory, neurocognitive and reproductive health effect. The most important are cardiovascular and respiratory health effects; others are the risk of burns and cataract in the eyes. Biomass fuel is any living or recently living plant and animal-based material that is burned by humans as fuels, for example, wood, dried animal dung, charcoal, grass and other agricultural residues. Biomass fuels are at the low end of the energy ladder in terms of combustion efficiency and cleanliness. Incomplete combustion of biomass contributes majorly to household air pollution and ambient air pollution. A large number of health-damaging air pollutants are produced during the incomplete combustion of biomass. These include respirable particulate matter, carbon monoxide, nitrogen oxides, formaldehyde, benzene, 1, 3 butadiene, polycyclic aromatic hydrocarbons (PAHs), and many other toxic organic compounds. In this article, health effects of biomass fuel use will be described in details highlighting the most affected systems and organs of the body.
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Varadarajan, Rajagopalan, and Abdul Majeeth Bathusha. "Non-Point Source Pollutants From Motor Vehicles." In Global Perspectives on Air Pollution Prevention and Control System Design, 227–38. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7289-3.ch009.

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Motor vehicles emit gaseous pollutants from incomplete carbon reactions, unburned hydrocarbons, or other elements present in the fuel or air during combustion of fossil fuels. Atmospheric pollution is caused by multiple sources, making it a non-point source for the pollutants. The adverse effects of vehicular pollution are physical, chemical, and socio-economic in nature and are to be mitigated by the process of education, rules, and policies. A study has been done with the activated carbon made from Proposis cineria for mitigation.
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Viskup, Richard, Christoph Wolf, and Werner Baumgartner. "Qualitative Characterisation of Trace Elements in Diesel Particulate Matter from In-Use Diesel Engine Passenger Vehicles by Means of Laser-Induced Breakdown Spectroscopy." In Environmental Emissions. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.93067.

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In this research, we applied laser-plasma spectroscopy technique for the measurement of trace chemical elements in the exhaust emissions generated from in-use diesel engine passenger vehicles. We use high resolution laser-induced breakdown spectroscopy (LIBS) technique for diagnostics of soot and particulate matter (PM). Here we analysed soot and PM, extracted from exhaust manifold part, from different passenger vehicles that are used in daily life environment. The main aim of this study is to reveal the trace chemical elements in different PM matrices. The presence of trace elements in exhaust emissions can originate from different sources: from injected fuel type and fuel additives, engine lubricants, engine combustion process, incomplete catalytic reaction, inefficiency or wear out of PM filtering devices, dysfunctions or failures of engine or vehicle or even information related to polluted intake air.
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Bhuyan, Krishna, and Anirudha Giri. "Polycyclic Aromatic Hydrocarbon Compounds as Emerging Water Pollutants." In Advances in Environmental Engineering and Green Technologies, 45–67. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1871-7.ch004.

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Aquatic ecosystems are pivotal resources that nurture diverse life forms apart from providing different ecosystem services. Global pollution, directly and indirectly, depletes the quality and standards of these resources and hampers the animals residing there. The incomplete combustion of all sorts of organic substances found in nature produces and release an emerging group of contaminants known as polycyclic aromatic hydrocarbons (PAHs). There are over a hundred different kinds of PAHs known and 16 amongst them are regarded as priority pollutants including phenanthrene (PHE). PHE is abundantly found in the aquatic environment and poses a higher risk to animals. It causes a vast array of toxicities in aquatic animals including genotoxicity, cardiotoxicity, transgenerational toxicity, neurotoxicity, developmental toxicity, and potentially induces oxidative stress and behavioral alterations. However, many areas of PHE toxicity in aquatic organisms are yet to be properly understood and management measures are yet to be initiated.
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Conference papers on the topic "Incomplete combustion"

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Filinkov, Leonid I., Anatoliy M. Likhter, and Nguyen T. Thanh. "Algorithm and Software for Controlled Incomplete Combustion Method." In 2020 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus). IEEE, 2020. http://dx.doi.org/10.1109/eiconrus49466.2020.9039512.

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Li, Hailin, W. Stuart Neill, Hongsheng Guo, and Wally Chippior. "The NOx and N2O Emission Characteristics of an HCCI Engine Operated With N-Heptane." In ASME 2007 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/icef2007-1758.

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This paper presents the NOx and N2O emission characteristics of a Cooperative Fuel Research (CFR) engine modified to operate in Homogeneous Charge Compression Ignition (HCCI) combustion mode using an air-assist port fuel injector. The single-cylinder engine was fuelled with n-heptane for these experiments. The parameters examined include intake air temperature and pressure, air/fuel ratio, compression ratio, and exhaust gas recirculation (EGR) rate. The parameters were varied in order to change the combustion phasing from advanced (knocking) to retarded (incomplete combustion) conditions. NOx emissions were less than 5 ppm for a fairly wide range of combustion phases, except when knocking or incomplete combustion occurred, and were largely unaffected by the parameter varied when the combustion phase was within the acceptable range. It was also found that NOx emissions increased significantly when retarded and incomplete combustion was observed even though lower combustion temperatures were expected. The increased N2O and unburned hydrocarbon (THC) emissions usually observed with retarded combustion phasing, as well as the deteriorated combustion efficiency, may contribute to this unexpected increase in NOx emissions. It was also shown that N2O emissions were extremely low (less than 0.5 ppm) except when incomplete combustion was observed.
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3

Sakai, Seigo, Ryo Abo, Kuniomi Araki, and Nobushige Amino. "Pyrolysis of Organic Compounds Using Incomplete Combustion on Ceramics Bed." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22553.

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Presently, recycling and disposal of organic wastes need a large amount of labor and energy due to such problems as the dioxin emission. It is thought that to develop a new pyrolysis mechanism for organic wastes will contribute to solving the environmental problem. Therefore, we propose a safe and inexpensive pyrolysis mechanism in which incomplete combustion occurs in small area on ceramics bed (thin burning layer), because ceramics are highly thermo-stability and have good thermal radiation characteristics at high temperature. Organic compounds pyrolyze in the thin burning layer only.
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4

Beck, Christian H., Rainer Koch, and Hans-Joerg Bauer. "Investigation of the Effect of Incomplete Droplet Prevaporisation on NOx Emissions in LDI Combustion Systems." In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27654.

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The influence of incomplete liquid fuel prevaporisation on the emissions of nitric oxides in a swirl stabilized model gas turbine combustor is investigated experimentally and numerically. The design of the model combustor enables the variation of the degree of prevaporisation. This is achieved by using two liquid fuel injectors. One injector is located far upstream of the flame and generates a fully prevaporized and premixed air fuel mixture. The second injector is located at the combustor inlet. Consequently, the liquid fuel mass flow split between the two injectors determines the fraction of non-prevaporized fuel present in the reaction zone. The NO/NO2 measurements were performed with a chemo-luminescence analyzer. In accordance to the findings of other workers, our experimental study revealed that the influence of prevaporization on nitric oxide emissions is of significance for practical applications. The experimental studies were accompanied by numerical studies of partially prevaporized lean combustion in an abstracted configuration. Purpose of this study is to gain detailed understanding of the influence of droplet slip on droplet flame position and peak temperature. The droplet slip velocity was found to have a significant impact on the peak temperature of the droplet flame and, therefore, NO formation rates within the droplet flame. The combustion system used for the experimental investigation was characterized regarding droplet slip velocities with an extended LDA technique. The comparison between numerical and experimental results shows that the droplet slip velocities in the macroscopic reaction zone are within the transition range from an envelope to a wake flame. It is concluded that small-scale mixing effects play a significant role in the formation of nitric oxides in spray combustion systems with incomplete prevaporization.
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5

Wang, Jinsheng, Yinghai Wu, and Ben Anthony. "Reactivation of FBC Ash as Sulphur Sorbent: Hydration and Sulphation Studies." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78075.

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The efficiency of limestone utilization for in situ sulphur capture in fluidized bed combustors is low due to incomplete sulphation of CaO. Reutilization of the partially sulphated limestone sorbent for SO2 emission control is highly desirable both on economic and environmental grounds. Hydration of the FBC ash can reactivate the spent limestone so that the hydrated ash will take up SO2 effectively when reinjected into the combustors as SO2 sorbent. In this work hydration of ashes from a large fluidized bed combustor was studied with special focus on the hydration rate. Factors, which affect the rate and efficiency of the reactivation process, such as temperature, particle size, and hydration time, were examined and the effect of hydration on sulphation was also discussed.
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6

Rutar, Teodora, Scott M. Martin, David G. Nicol, Philip C. Malte, and David T. Pratt. "Effects of Incomplete Premixing on NOx Formation at Temperature and Pressure Conditions of LP Combustion Turbines." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-335.

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A probability density function/chemical reactor model (PDF/CRM) is applied to study how NOx emissions vary with mean combustion temperature, inlet air temperature, and pressure for different degrees of premixing quality under lean-premixed (LP) gas turbine combustor conditions. Inlet air temperatures of 550, 650 and 750 K, and combustor pressures of 10, 14 and 30 atm are examined in different chemical reactor configurations. Primary results from this study are: incomplete premixing can either increase or decrease NOx emissions, depending on the primary zone stoichiometry; an Arrhenius-type plot of NOx emissions may have promise for assessing the premixer quality of lean-premixed combustors; and decreasing premixing quality enhances the influence of inlet air temperature and pressure on NOx emissions.
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7

Liou, T. M., and L. Chen. "Mixing and Combustion Characteristics of a Side Dump Combustor With Noncircular Fuel Injectors." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-469.

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A numerical study of the mixing and combustion characteristics of an axial jet issued from rectangular injectors of different aspect ratios (3 and 1/3) in a three-dimensional side-dump combustor is presented. The Reynolds number based on the bulk mean velocity and combustor duct height was 5.9×104 and the momentum ratio of the axial-fuel jet to the side-air jets was 0.2. A two equation k-ε turbulence model incorporating with a two-step finite-rate combustion model was adopted to simulate the nonreacting and reacting flows in a side-dump combustor. The computed nonreacting flow pattern was verified by the available experimental data. A comparison between the reacting and nonreacting flow patterns was made. The axis switching phenomenon previously observed for the unconfined or confined noncircular jets was examined in detail for the present side-dump combustor. It was found that the axis switching phenomenon was incomplete and that the aspect ratio had weak effects on the turbulent mixing and combustion in the ducted rocket combustor under the investigated conditions.
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8

Dev, Shouvik, Prasad Divekar, Kelvin Xie, Xiaoye Han, Xiang Chen, and Ming Zheng. "A Study of Combustion Inefficiency in Diesel LTC and Gasoline-Diesel RCCI via Detailed Emission Measurement." In ASME 2014 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icef2014-5656.

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Reduction of engine-out NOx emissions to ultra-low levels is facilitated by enabling low temperature combustion (LTC) strategies. However, there is a significant energy penalty in terms of combustion efficiency as evidenced by the accompanying high levels of hydrocarbon (HC), carbon monoxide (CO), and hydrogen emissions. In this work, the net fuel energy lost as a result of incomplete combustion in two different LTC regimes is studied. The first LTC strategy, partially premixed compression ignition (PPCI), is investigated using a single, high pressure, in-cylinder injection of diesel fuel along with the application of exhaust gas recirculation (EGR). The second strategy includes dual-fuel application – reactivity controlled compression ignition (RCCI) of port injected gasoline and direct injected diesel. Moderate to high levels of EGR are necessary during engine operation in either of the two LTC pathways. A detailed analysis of the incomplete combustion products was conducted while the engine was operated in the aforementioned LTC modes. Speciation analysis of hydrocarbons was performed by sampling the exhaust gas in an FTIR. The total HC and the CO emissions were simultaneously measured using an FID and an NDIR, respectively. The production of hydrogen during the combustion process was also evaluated using a mass spectrometer. Engine tests were conducted at a baseline load level of 10 bar IMEP in the PPCI and RCCI modes. Load extension tests, up to 17 bar IMEP, were then conducted in the RCCI mode by increasing the gasoline-to-diesel fuel ratio. Test results indicated that CO, H2, and light HC made up for most of the combustion in-efficiency in the PPCI mode while heavier HC and aromatics were significantly higher in the RCCI mode.
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9

Musu, E., S. Zanforlin, and R. Gentili. "Four Stroke Engine Geometry for Stratified Charge Combustion." In ASME 2005 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/icef2005-1218.

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In four-stroke engines direct injection increases power and fuel economy, which is further improved by charge stratification, due to pumping loss reduction and better combustion efficiency at partial loads. Charge stratification can be obtained by different techniques and injector designs. In every case late injection is necessary for stratification, which however is impaired by fuel dilution and spreading in consequence of burnt gas expansion, leading to incomplete combustion at very light loads. A numerical study has been carried out modifying KIVA code to handle new piston shapes. An innovative combustion chamber that is split in two volumes and allows fuel confinement during combustion has been conceived. CFD comparison has been made between a conventional combustion chamber and the proposed new one in term of combustion efficiency. Combustion is enhanced by the new design and unburnt emissions are reduced.
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10

Semenikhin, A. S., A. S. Savchenkova, I. V. Chechet, S. G. Matveev, I. A. Zubrin, M. Frenklach, and A. M. Mebel. "REACTIONS OF TRANSFORMATION OF THE FIVE-MEMBERED RING OF CYCLOPENTAPHENANTHRENE UPON INTERACTION WITH ACETYLENE: A THEORETICAL STUDY." In 9TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap9a-10.

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Reducing emissions of carcinogenic polycyclic aromatic hydrocarbons (PAHs) and the smoke number at the stage of designing and improving of combustion chambers is an urgent engineering and environmental task that requires improvement of the currently used predictive combustion models. The submechanisms describing the growth of PAHs in such models are incomplete and valid only in a narrow range of initial conditions. Further refinement of the kinetics of PAH and soot formation is associated with the need for more theoretical and experimental studies.
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Reports on the topic "Incomplete combustion"

1

Nelson, Thomas, and Leonard Wood. The Effect of Baghouse Fines and Incomplete Combustion Products in a Drum Drier on the Characteristics of Asphalt Paving Mixtures - Phase I. West Lafayette, IN: Purdue University, 1990. http://dx.doi.org/10.5703/1288284313430.

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2

Lin, Jyh-Dong, and Leonard Wood. The Effects of Bag House Fines and Incomplete Combustion Products in a Drum Drier on the Characteristics of Asphalt Paving Mixtures, Phase II. West Lafayette, IN: Purdue University, 1990. http://dx.doi.org/10.5703/1288284313429.

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