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Статті в журналах з теми "Sonochemical analysis"
Yavorskiy, Victor, Yuriy Suchatskiy, Zenoviy Znak, and Roman Mnykh. "Investigations of Cavitation Processes in Different Types of Emitters Using Sonochemical Analysis." Chemistry & Chemical Technology 10, no. 4 (September 15, 2016): 507–13. http://dx.doi.org/10.23939/chcht10.04.507.
Повний текст джерелаPirola, Carlo. "Basic Economic Analysis for Sonochemical Processes." Journal of Chemical Engineering Research Updates 7, no. 1 (September 18, 2020): 1–5. http://dx.doi.org/10.15377/2409-983x.2020.07.1.
Повний текст джерелаAfkhami, Farhad, Ali Khandar, Ghodrat Mahmoudi, Reza Abdollahi, Atash Gurbanov, and Alexander Kirillov. "Sonochemical Synthesis of Cadmium(II) Coordination Polymer Nanospheres as Precursor for Cadmium Oxide Nanoparticles." Crystals 9, no. 4 (April 9, 2019): 199. http://dx.doi.org/10.3390/cryst9040199.
Повний текст джерелаVichare, Nilesh P., Parag R. Gogate, Vishwas Y. Dindore, and Aniruddha B. Pandit. "Mixing time analysis of a sonochemical reactor." Ultrasonics Sonochemistry 8, no. 1 (January 2001): 23–33. http://dx.doi.org/10.1016/s1350-4177(99)00046-2.
Повний текст джерелаZida, Serge Ismael, Yue-Der Lin, and Yit Lung Khung. "Sonochemical Reaction of Bifunctional Molecules on Silicon (111) Hydride Surface." Molecules 26, no. 20 (October 13, 2021): 6166. http://dx.doi.org/10.3390/molecules26206166.
Повний текст джерелаZida, Serge Ismael, Yue-Der Lin, and Yit Lung Khung. "Sonochemical Reaction of Bifunctional Molecules on Silicon (111) Hydride Surface." Molecules 26, no. 20 (October 13, 2021): 6166. http://dx.doi.org/10.3390/molecules26206166.
Повний текст джерелаGabriella, Rachel, Muhammad Aldin Nur Zen, Fatih Izzul Haq, Silmi Ridwan Putri, and Asep Bayu Dani Nandiyanto. "Techno-Economic Analysis of NiFe2O4 Nanoparticle Industry Using Sonochemical Synthesis Method." International Journal of Research and Applied Technology 1, no. 2 (December 2, 2021): 289–99. http://dx.doi.org/10.34010/injuratech.v1i2.6364.
Повний текст джерелаBhanvase, B. A., V. B. Kadam, T. D. Rode, and P. R. Jadhao. "Sonochemical Process for the Preparation of Novel Calcium Zinc Molybdate Nanoparticles." International Journal of Nanoscience 14, no. 04 (July 28, 2015): 1550014. http://dx.doi.org/10.1142/s0219581x15500143.
Повний текст джерелаGogate, Parag R., Prashant A. Tatake, Parag M. Kanthale, and Aniruddha B. Pandit. "Mapping of sonochemical reactors: Review, analysis, and experimental verification." AIChE Journal 48, no. 7 (July 2002): 1542–60. http://dx.doi.org/10.1002/aic.690480717.
Повний текст джерелаLee, Soo Jin, Woon Jo Cho, Chong Shik Chin, and Il Ki Han. "Sonochemical Synthesis of Silicon Nanocrystals." Key Engineering Materials 277-279 (January 2005): 995–99. http://dx.doi.org/10.4028/www.scientific.net/kem.277-279.995.
Повний текст джерелаДисертації з теми "Sonochemical analysis"
King, David. "Sonochemical analysis of the output of ultrasonic dental descalers." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538276.
Повний текст джерелаTiong, Timm Joyce. "Sonochemical and ultrasonic output analyses on dental endosonic instruments." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558866.
Повний текст джерелаЗінь, Ольга Іванівна. "Засади енергоощадної кавітаційної технології очищення стічних вод від ароматичних сполук". Thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/32167.
Повний текст джерелаУ дисертації наведено результати досліджень з очищення водних середовищ від ароматичних сполук, зокрема бензену і толуену. Встановлено вплив температури, тривалості кавітаційного оброблення та кисню на їх деструкцію. Виявлено ефект кавітаційного ініціювання розкладу ароматичних сполук, зокрема внаслідок змішування кавітаційно обробленої та вихідної стічної вод. Ефективність розкладу бензену підтверджено дослідженнями з використанням гідродинамічного кавітатора. Досліджено кавітаційне окиснення бензену гіпохлоритними водами. Вивчено корозійну агресивність досліджуваних водних середовищ. Розроблену технологію очищення апробовано на реальних стічних водах. Визначено технологічні параметри кавітаційного очищення стічних вод від ароматичних сполук. Виконано узагальнені енергетичні та техніко-економічні розрахунки технологічного процесу.
The thesis presents results of research aimed at establishing an effective method of treatment of aqueous media from aromatic compounds, especially benzene and toluene. The influence of cavitation processing on the treatment of aqueous media has been investigated. In order to identify general patterns of the process and determine the direction of further research, the decomposition of benzene was studied under adiabatic conditions at room temperature. Studies have been carried out on cavitation destruction of benzene under various hydrodynamic conditions: with intensive mechanical stirring, without mechanical stirring, in which oxygen absorption was limited, to confirm the participation of atmospheric oxygen in the decomposition of benzene. It was established by spectrophotometric studies and determination of the amount of chemical oxygen consumption, that under the action of cavitation treatment, benzene is gradually transformed, namely its concentration decreases, not its destruction with accumulation in the reaction medium of the corresponding organic fragments of linear structure. The highest benzene conversion rate was observed at 10.2 W ultrasonic radiation. This is probably due to the fact that in the reaction system under the action of cavitation formed a system of parallel-sequential reactions, in which the rate of destruction of benzene with the participation of water sonolysis products is the highest, compared with processes occurring at other capacities of the ultrasonic emitter. Isothermal studies at different temperatures have been performed to establish the kinetic indices of cavitation degradation of benzene. It was first discovered that at a temperature of 313 K the rate of cavitation oxidation of benzene is much lower than that of 303 and 323 K. The effect detected is due to the formation at the temperature of highly dispersed bubbles - Babston, which are characterized by high resistance to collapse. The effect of the cavitation initiation of the destructive oxidation of aromatic compounds in the presence of an oxygen system was first discovered. It is that the decomposition of aromatic compounds occurs even after cavitation excitation ceases, but only if some energy is introduced into the reaction medium by the ultrasonic radiation. It was found that due to the cavitation initiation of the process, the oxidation rate of benzene is higher, and the energy consumption, respectively, is lower than with the constant excitation of cavitation by ultrasonic radiation.The values of the rate constants of the benzene decomposition process for the reaction initiation mode are approximately 2.2 ... 2.4 times higher than those for the stationary mode. However, the overall speed of the process of destruction of benzene to a concentration equal to the maximum permissible, in the case of cavitation initiation of the process and in the stationary mode of excitation of cavitation, are almost the same. The effectiveness of wastewater treatment from aromatic compounds in the case of mixing cavitation-treated wastewater and output (untreated) wastewater was first revealed. The content of cavitation treated wastewater in the mixture is not more than 10%. The high efficiency of cavitation degradation of benzene has been confirmed by studies performed using a jet-type hydrodynamic cavitator with a drive power of 1.1 kW. It is found that the energy consumption for the transformation of benzene in the hydrodynamic cavitator is less than when using an ultrasonic emitter. The main regularities obtained during the study of the destruction of benzene were confirmed using model solutions containing toluene. Based on a comparative sonochemical analysis of the intensity of development of cavitation fields in water and wastewater simulations, the possibility of oxidation of benzene and toluene, the reaction mechanism in an aqueous-organic medium in the mode of cavitation process initiation, is established. Based on UV spectroscopic studies, the effect of hypochlorite wastewater on the effectiveness of cavitation treatment has been identified. It is established that almost complete destruction of benzene occurs at a molar ratio of benzene: sodium hypochlorite is less than stoichiometric. This indicates a significant role in the oxidation of benzene cavitation phenomena. Using the dependence of the carbon steel corrosion potential on the exposure time in the medium, the corrosiveness of the tested aqueous media relative to the material of the equipment and communications existing in the production was established. The developed energy-saving cavitation technology for wastewater treatment from aromatic compounds was tested. The technological foundations of the process of cavitation wastewater treatment from aromatic compounds are formulated; the technological parameters for the implementation of this process are determined. The generalized energy and technical and economic calculations of energy-saving cavitation technology for wastewater treatment from aromatic compounds have been performed. Based on the results obtained in experimental studies of the decomposition of benzene in cavitation fields generated using both an ultrasonic emitter and a hydrodynamic jet cavitator, as well as analysis of information sources, several variants of technological schemes for conditioning olefin wastewater have been developed.
В диссертации приведены результаты исследований по очистке водных сред от ароматических соединений, в частности бензола и толуола. Установлено влияние температуры, продолжительности кавитационной обработки и кислорода на их деструкцию. Обнаружен эффект кавитационного инициирования разложения ароматических соединений. Эффективность разложения бензола подтверждена исследованиями с использованием гидродинамического кавитатора. Исследовано кавитационное окисления бензола гипохлоритнимы водами. Изучена коррозионная агрессивность испытуемых водных сред. Апробировано технологию очистки на реальных сточных водах. Определены технологические параметры кавитационной очистки сточных вод от ароматических соединений. Выполнены энергетические и технико-экономические расчеты технологического процесса.
Shieh, Yuh-Chern, and 謝玉宸. "Modal Analysis and Experiment of Sonochemical Cell." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/59726823660402875680.
Повний текст джерела國立成功大學
機械工程學系碩博士班
96
Now, there are many methods which can produce nano-powder. Using high intensity ultrasound is one way of those methods. The ultrasound is generated using a piezoelectric transducer and is amplified thru a horn emersed in liquid. Enormous cavitation bubbles are then produced around the horn tip and cause the effects of materials refined and sonochemistry. But this method will make the horn tip be quickly eroded by cavitation bubbles. The erosion not only shortens the life time of the horn, but also pollutes the sample in sonochemical cell. In this study, we design a sonochemical cell so that the problem of the horn tip erosion can be avoided. First, we use the software COMSOL to simulate the acoustic field in the cell. The idea is to find a resonant acoustic mode in which the largest acoustic pressure is moved from the horn tip to the inside of the cell. The size of the cell must be designed so that the resonant frequency corresponding the mode matches that of the piezoelectric transducer. Once the resonant mode is achieved, very large normalized acoustic pressure can be obtained away from the horn tip. So we design a cell which the resonance properties and the acoustic pressure field modal accord with the demands. Experimentally, we use hydrophones to measure the acoustic field in the cell and confirm the results of the simulation. A novel horn with enlarged cross-sectional area is proposed and used to excite the resonant acoustic mode. It is shown that this method can generate cavitation bubble field at a location inside the cell accord with the demands. That is, we can avoid tip erosion by cavitation bubbles also prove that the cell has a big effect to acoustic pressure field.
Yao, Ming-Tzung, and 姚明宗. "Analysis and Experiment of Resonant Sonochemical Cell." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/91179120472182142247.
Повний текст джерела國立成功大學
機械工程學系碩博士班
97
Sonochemical effects of high intensity ultrasound come mainly from acoustic cavitation. Cavitation bubble collapse in liquid is so violent that very high local pressure and temperature, combined with extraordinarily cooling, provide a unique environment for driving chemical reactions under extreme conditions. In general, high power ultrasonic sonochemical systems utilize a metal horn to amplify the intensity of the ultrasound generated from a piezoelectric transducer. As a result, cavitation bubbles form near the horn tip, causing severe erosion of the horn, contamination of the sample, and degeneration of the system resonance. In the study, the COMSOL finite element software is used first to construct a tool for designing and analyzing the ultrasonic sonochemical system. Different physical modules, namely piezoelectric module, structural module, and acoustic module, are coupled together. In order to eliminate the cavitation erosion, an enlarged horn is designed for reducing the energy density of the ultrasound transmitted to the sonochemical cell. Numerical results show that an ideal resonant mode can be found by adjusting the immersed depth of the horn and the radius of the sonochemical cell so that the greatest amplitude of the acoustic pressure is located away from the horn tip. Experimentally, it is confirmed that the various resonant modes observed in the numerical analysis indeed exist. The most important finding of the present study is that focused cavitation field can be generated away from the horn by careful design of the components of the resonant sonochemical system.
Yu-HsiangHsu and 徐鈺翔. "Analysis and experiments of various resonant cavitation modes of a 40-kHz immersed-type sonochemical reactor." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/73425500110384643359.
Повний текст джерелаJena, Hrudananda. "Ionic Transport And Structural Investigations On Selected Perovskites Synthesized By Wet Chemical Methods." Thesis, 2004. http://etd.iisc.ernet.in/handle/2005/1260.
Повний текст джерелаТези доповідей конференцій з теми "Sonochemical analysis"
Rangari, Vijaya, Tiffianni Watson, and Shaik Jeelani. "Fabrication, Thermal and Mechanical Characterization of Silicon Carbide-Expancel Nanocomposite." In ASME 2006 Multifunctional Nanocomposites International Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/mn2006-17049.
Повний текст джерела