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Journal articles on the topic 'Kinetic of combustion'

Author: Grafiati

Published: 16 May 2023

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1

Qin, Yuelin, Qingfeng Ling, Wenchao He, Jinglan Hu, and Xin Li. "Metallurgical Coke Combustion with Different Reactivity under Nonisothermal Conditions: A Kinetic Study." Materials 15, no. 3 (2022): 987. http://dx.doi.org/10.3390/ma15030987.

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The combustion characteristics and kinetics of high- and low-reactivity metallurgical cokes in an air atmosphere were studied by thermogravimetric instrument. The Coats–Redfern, FWO, and Vyazovkin integral methods were used to analyze the kinetics of the cokes, and the kinetic parameters of high- and low-reactivity metallurgical cokes were compared. The results show that the heating rate affected the comprehensive combustion index and combustion reaction temperature range of the cokes. The ignition temperature, burnout temperature, combustion characteristics, and maximum weight-loss rate of lo

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2

Zhang, Yong Feng, Xiang Yun Chen, Quan Zhou, Qian Cheng Zhang, and Chun Ping Li. "Combustion Kinetic Analysis of Lignite in Different Oxygen Concentration." Advanced Materials Research 884-885 (January 2014): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amr.884-885.37.

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Combustion behavior of indigenous lignite in oxygen-enriched conditions was investigated by using thermogravimetric analyzer (TGA). Combustion tests were carried out in different oxygen concentration (21%O2/79%N2, 30%O2/70%N2, 40%O2/60%N2, 50%O2/50%N2, 60%O2/40%N2, 70%O2/30%N2). Then get the characteristic temperatures. . The model-fitting mathematical approach was used to evaluated the kinetic triplet (f (α),E,A) through Gorbatchev method. The combustion stages were divided into the early combustion stage and the later combustion stage. The calculation showed that the kinetics parameters high

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3

Oo, Chit Wityi, Masahiro Shioji, Hiroshi Kawanabe, Susan A. Roces, and Nathaniel P. Dugos. "A Skeletal Kinetic Model For Biodiesel Fuels Surrogate Blend Under Diesel-Engine Conditions." ASEAN Journal of Chemical Engineering 15, no. 1 (2015): 52. http://dx.doi.org/10.22146/ajche.49693.

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The biodiesel surrogate fuels are realistic kinetic tools to study the combustion of actual biodiesel fuels in diesel engines. The knowledge of fuel chemistry aids in the development of combustion modeling. In order to numerically simulate the diesel combustion, it is necessary to construct a compact reaction model for describing the chemical reaction. This study developed a skeletal kinetic model of methyl decanoate (MD) and n-heptane as a biodiesel surrogate blend for the chemical combustion reactions. The skeletal kinetic model is simply composed of 45 chemical species and 74 reactions base

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4

Zhu, Zhouyuan, Canhua Liu, Yajing Chen, Yuning Gong, Yang Song, and Junshi Tang. "In-situ Combustion Simulation from Laboratory to Field Scale." Geofluids 2021 (December 14, 2021): 1–12. http://dx.doi.org/10.1155/2021/8153583.

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In-situ combustion simulation from laboratory to field scale has always been challenging, due to difficulties in deciding the reaction model and Arrhenius kinetics parameters, together with erroneous results observed in simulations when using large-sized grid blocks. We present a workflow of successful simulation of heavy oil in-situ combustion process from laboratory to field scale. We choose the ongoing PetroChina Liaohe D block in-situ combustion project as a case of study. First, we conduct kinetic cell (ramped temperature oxidation) experiments, establish a suitable kinetic reaction model

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5

Sun, Minmin, Jianliang Zhang, Kejiang Li, Guangwei Wang, Haiyang Wang, and Qi Wang. "Thermal and kinetic analysis on the co-combustion behaviors of anthracite and PVC." Metallurgical Research & Technology 115, no. 4 (2018): 411. http://dx.doi.org/10.1051/metal/2018064.

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The co-combustion characteristics of anthracite and PVC were investigated by thermogravimetric analysis to study its application in BF. First, the combustion characteristics were investigated. It was found the initial combustion temperature (Ti) of blends decreased with the increase of PVC ratio, while its decreasing rate reached maximum when 10% PVC. Aiming for further characterizing the combustion kinetics, ten gas-solid reaction mechanism functions were adopted for different groups. Results showed that Dimensional Diffusion Model is the best model to describe the combustion kinetics of anth

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6

Dinde, Prashant, A. Rajasekaran, and V. Babu. "3D numerical simulation of the supersonic combustion of H2." Aeronautical Journal 110, no. 1114 (2006): 773–82. http://dx.doi.org/10.1017/s0001924000001640.

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Results from numerical simulations of supersonic combustion of H2 are presented. The combustor has a single stage fuel injection parallel to the main flow from the base of a wedge. The simulations have been performed using FLUENT. Realisable k-ε model has been used for modelling turbulence and single step finite rate chemistry has been used for modelling the H2-Air kinetics. All the numerical solutions have been obtained on grids with average value for wall y+ less than 40. Numerically predicted profiles of static pressure, axial velocity, turbulent kinetic energy and static temperature for bo

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7

Gutierrez, Albio D., and Luis F. Alvarez. "Simulation of Plasma Assisted Supersonic Combustion over a Flat Wall." Mathematical Modelling of Engineering Problems 9, no. 4 (2022): 862–72. http://dx.doi.org/10.18280/mmep.090402.

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This work presents a simplified methodology to couple the physics of a nanosecond pulsed discharge to the process of supersonic combustion in a flat wall combustor configuration. Plasma and supersonic combustion are separately simulated and then coupled by seeding plasma-generated radicals on the combustion domain. The plasma model is built assuming spatial uniformity and considering only the kinetic effects of the nanosecond pulsed discharge. Therefore, a zero-dimensional kinetic scheme accounting for the generation of plasma species is utilized. For the combustion model, the complete set of

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8

Komarov, Ivan, Daria Kharlamova, Bulat Makhmutov, Sofia Shabalova, and Ilya Kaplanovich. "Natural Gas-Oxygen Combustion in a Super-Critical Carbon Dioxide Gas Turbine Combustor." E3S Web of Conferences 178 (2020): 01027. http://dx.doi.org/10.1051/e3sconf/202017801027.

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The paper presents results for chemical kinetics of combustion process in the combustor of oxy-fuel cycle super-critical carbon dioxide gas turbine based on the Allam thermodynamic cycle. The work shows deviation of the normal flame propagation velocity for the case of transition from the traditional natural gas combustion in the N2 diluent environment to the combustion at super-high pressure up to 300 bar in CO2 diluent. The chemical kinetics parametric study involved the Chemkin code with the GRI-Mesh 3.0 kinetic mechanism. This mechanism provides good correspondence between calculation resu

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9

Zhang, Yong-Feng, Xiang-Yun Chen, Qian-Cheng Zhang, Chun-Ping Li, and Quan Zhou. "Oxygen-enriched combustion of lignite." Thermal Science 19, no. 4 (2015): 1389–92. http://dx.doi.org/10.2298/tsci1504389z.

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The study is concerned on the oxygen-enriched combustion kinetics of lignite. Thermogravimetric experiments were carried out in a thermogravimetric analyzer under O2/N2 conditions, and operated at different heating rates ranging from 5?C per minute to 25?C per minute. Flynn-Wall-Ozawa method was used to calculate the kinetic parameter. The value of activation energy increased when the oxygen concentration varied from 21% to 70%.

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10

Várhegyi, Gábor, Zoltán Sebestyén, Zsuzsanna Czégény, Ferenc Lezsovits, and Sándor Könczöl. "Combustion Kinetics of Biomass Materials in the Kinetic Regime." Energy & Fuels 26, no. 2 (2011): 1323–35. http://dx.doi.org/10.1021/ef201497k.

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11

Jia, Guohai. "Combustion Characteristics and Kinetic Analysis of Biomass Pellet Fuel Using Thermogravimetric Analysis." Processes 9, no. 5 (2021): 868. http://dx.doi.org/10.3390/pr9050868.

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Biomass pellet fuel is one of the development directions of renewable energy. The purpose of the article is to study the combustion characteristics of five kinds of biomass pellet fuel that can be used as biomass fuel and analyze their combustion kinetics. The thermogravimetric method (TG method) was used to analyze the combustion characteristics of five kinds of biomass pellet fuel and to calculate the index S of comprehensive combustion characteristic. The Arrhenius equation and the Coats–Redfern method were used to analyze the combustion kinetics of five kinds of biomass pellet fuel. The ac

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12

Nissen, Anna, Zhouyuan Zhu, Anthony Kovscek, Louis Castanier, and Margot Gerritsen. "Upscaling Kinetics for Field-Scale In-Situ-Combustion Simulation." SPE Reservoir Evaluation & Engineering 18, no. 02 (2015): 158–70. http://dx.doi.org/10.2118/174093-pa.

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Summary We demonstrate the effectiveness of a non-Arrhenius kinetic upscaling approach for in-situ-combustion processes, first discussed by Kovscek et al. (2013). Arrhenius reaction terms are replaced with equivalent source terms that are determined by a work flow integrating both laboratory experiments and high-fidelity numerical simulations. The new formulation alleviates both stiffness and grid dependencies of the traditional Arrhenius approach. Consequently, the computational efficiency and robustness of simulations are improved significantly. In this paper, we thoroughly investigate the p

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13

Zhang, Lin Hai, Deng Qin Xue, Jia Xi Zhang, Yu Fu, and Shu Lin Hou. "Straw Mixed Combustion Characteristics and Kinetic Analysis." Applied Mechanics and Materials 448-453 (October 2013): 1605–11. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1605.

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The mixed materials come from Beijing Daxing District, corn stalks as the main raw material, peanut shells and wheat straw as affixation. Combustion characteristics of mixed materials are studied by using Thermogravimetric analyzer and combustion dynamics studied by using Coats-Refern method to offer practical and theoretical data for crop straw combustion and Densified . Studies have shown that Combustion curve of three samples have two distinct peaks, divided into water evaporated to dryness, and the combustion of volatiles, fixed carbon combustion and burnout four basic stages and lied a la

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14

Stolarek, P., and S. Ledakowicz. "Thermal processing of sewage sludge by drying, pyrolysis, gasification and combustion." Water Science and Technology 44, no. 10 (2001): 333–39. http://dx.doi.org/10.2166/wst.2001.0655.

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Thermal processing of sewage sludge including drying, pyrolysis and gasification or combustion may be an alternative to other ways of utilising it. In this paper thermogravimetric analysis (TGA) was employed in the investigation of thermal decomposition of sewage sludge. The kinetic parameters of drying, pyrolysis and gasification or combustion of sewage sludge have been determined in an inert-gas (argon) and additionally some series of the sludge decomposition experiments have been carried out in air, in order to compare pyrolysis and combustion. The pyrolysis char has been gasified with carb

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15

Meng, Kang, Wang Sheng Chen, Ying Zhang, Jun Han, and Xing Dong Wang. "Investigation of Vanadium Containing Shale in Combustion Behavior." Advanced Materials Research 634-638 (January 2013): 775–82. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.775.

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The combustion kinetics and characteristics of vanadium containing shale were studied in a thermogravimetric analyzer and drop tube furnace. The results indicate that vanadium containing shale has a high ignition temperature and a poor stable-combustion characteristic. At the same time, it is found that the optimum reaction temperature of de-carbon is 1273 K. Moreover, the kinetic parameters are calculated by isoconversional method at different reaction stages.

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16

Banu, Ionut, Mihaela Manta, Ioana Stoica, Georgeta Bercaru, and Grigore Bozga. "Kinetics of methyl methacrylate combustion over a Pt/alumina catalyst." Journal of the Serbian Chemical Society 83, no. 6 (2018): 759–72. http://dx.doi.org/10.2298/jsc170809008b.

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The combustion of methyl methacrylate (MMA) over a commercial Pt/?-alumina catalyst was investigated, in the lean air mixtures specific for the depollution applications. The experiments were performed at temperatures between 150 and 360?C, with MMA concentrations of 460 to 800 ppmv and the gas flow rates between 200 and 300 mL min-1. The results evidenced a negative influence of MMA concentration on the combustion kinetics. A kinetic model of the combustion process was developed, based on the Langmuir?Hinshelwood mechanism, assuming the surface reaction between adsorbed oxygen atoms and adsorb

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17

Peters, Bernhard, and Joanna Smuła-Ostaszewska. "A Numerical Approach to Predict Sulphur Dioxide Emissions During Switchgrass Combustion." Chemical and Process Engineering 34, no. 1 (2013): 121–37. http://dx.doi.org/10.2478/cpe-2013-0011.

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Abstract The demand for a net reduction of carbon dioxide and restrictions on energy efficiency make thermal conversion of biomass a very attractive alternative for energy production. However, sulphur dioxide emissions are of major environmental concern and may lead to an increased corrosion rate of boilers in the absence of sulfatation reactions. Therefore, the objective of the present study is to evaluate the kinetics of formation of sulphur dioxide during switchgrass combustion. Experimental data that records the combustion process and the emission formation versus time, carried out by the

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18

Kukshinov, N. V., S. N. Batura, and M. S. Frantsuzov. "Validation of Methods for Calculating Hydrogen Combustion in a Supersonic Model Air Flow Using the Experimental Data of Beach — Evans — Schexnayder." Proceedings of Higher Educational Institutions. Маchine Building, no. 11 (716) (November 2019): 36–45. http://dx.doi.org/10.18698/0536-1044-2019-11-36-45.

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This paper deals with numerical simulation of combustion of a hydrogen-air mixture in a supersonic flow. The simulation is based on solving the complete system of Navier-Stokes equations with closure using the turbulence model and detailed chemical kinetics. The mixing and combustion of a hydrogen-air fuel mixture is considered in the experimental formulation of Beach-Evans-Schexnayder. The effect of various kinetic mechanisms, turbulence models, TCI models, and boundary conditions on the solution is studied qualitatively and quantitatively. The relative errors of mass concentration of water f

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19

Branca, Carmen, and Colomba Di Blasi. "Combustion Kinetics of Secondary Biomass Chars in the Kinetic Regime." Energy & Fuels 24, no. 10 (2010): 5741–50. http://dx.doi.org/10.1021/ef100952x.

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20

Cinar, Murat, Berna Hasçakir, Louis M. Castanier, and Anthony R. Kovscek. "Predictability of Crude Oil In-Situ Combustion by the Isoconversional Kinetic Approach." SPE Journal 16, no. 03 (2011): 537–47. http://dx.doi.org/10.2118/148088-pa.

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Summary One method to access unconventional heavy-crude-oil resources as well as residual oil after conventional recovery operations is to apply in-situ combustion (ISC) enhanced oil recovery. ISC oxidizes in place a small fraction of the hydrocarbon, thereby providing heat to reduce oil viscosity and increase reservoir pressure. Both effects serve to enhance recovery. The complex nature of petroleum as a multicomponent mixture and the multistep character of combustion reactions substantially complicate analysis of crude-oil oxidation and the identification of settings where ISC could be succe

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21

Pawlaczyk, Anna, and Krzysztof J. Gosiewski. "Simplified Kinetic Model for Thermal Combustion of Lean Methane–Air Mixtures in a Wide Range of Temperatures." International Journal of Chemical Reactor Engineering 11, no. 1 (2013): 111–21. http://dx.doi.org/10.1515/ijcre-2012-0074.

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Abstract The paper presents results of kinetic studies on thermal methane combustion over honeycomb monoliths. An analysis of the previous experiments [1] has shown that equations proposed there and their kinetic parameters satisfactorily describe kinetics only for relatively low temperatures up to approx. 700°C. The present study corresponds to that related and supplements the previous data with new kinetic parameters obtained in higher temperatures in the reaction zone up to 900°C. A method of the reaction rate calculation for further simulation studies combining the kinetic parameters obtai

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22

He, Zhan Wen, and Chuan Cheng Zhang. "Study on Combustion Characteristics of Impurity Coal Based on TG-DTG-DTA." Advanced Materials Research 568 (September 2012): 360–63. http://dx.doi.org/10.4028/www.scientific.net/amr.568.360.

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Abstract.Based on TG-DTG-DTA, combustion characteristics and kinetic parameters of impure coal in the 10 °C / min heating rate were studied. The results showed that with the increase in the proportion of impurities, ignition temperature, burned temperature significantly improved; combustion characteristics of index clearly decreased; combustion process can be described by a diffusion kinetic equation

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23

MIYOSHI, Akira. "Combustion Kinetic Modeling -- toward the Innovation of Internal Combustion Engine." Proceedings of Mechanical Engineering Congress, Japan 2017 (2017): W071001. http://dx.doi.org/10.1299/jsmemecj.2017.w071001.

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24

Wang, Qing, Xu Dong Wang, Hong Peng Liu, and Chun Xia Jia. "Co-Combustion Mechanism Analysis of Oil Shale Semi-Coke and Rice Straws Blends." Advanced Materials Research 614-615 (December 2012): 45–48. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.45.

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In this work, a series of combustion experiments for oil shale semi-coke , rice straws as well as their mixture were conducted by the thermogravimetric analyzer at different heating rates (10, 20 and 50 K/min) under atmospheric pressure. Combustion characteristic curves and combustion characteristic parameters were acquired. The results showed that the combustion process of blends can be broadly separated into three stages: combustion of the volatile matter, combustion of fixed carbon and combustion of difficult decomposition substance. The point of ignition and burnout shifted to higher tempe

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25

Liu, Xiaorui, Dong Li, Jiamin Yang, and Longji Yuan. "Kinetic Mechanisms and Emissions Investigation of Torrefied Pine Sawdust Utilized as Solid Fuel by Isothermal and Non-Isothermal Experiments." Materials 15, no. 23 (2022): 8650. http://dx.doi.org/10.3390/ma15238650.

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This study comprehensively investigated the utilization of torrefied pine sawdust (PS) as solid fuels, involving the characterization of torrefied PS properties, the investigation of combustion behaviors and kinetic mechanisms by non-isothermal experiments, and the evaluation of emissions during isothermal experiments. Results show that torrefaction significantly improved the quality of the solids. The upgradation of torrefied PS properties then further enhanced its combustion performance. For the kinetics mechanisms, degradation mechanisms and diffusion mechanisms were respectively determined

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26

SHIMIZU, Taito, and Tamio IDA. "Combustion kinetic analysis of torrefied biocoke." Proceedings of the Symposium on Environmental Engineering 2021.31 (2021): 206. http://dx.doi.org/10.1299/jsmeenv.2021.31.206.

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27

Gerasimov, G. Ya, Yu V. Tunik, P. V. Kozlov, V. Yu Levashov, I. E. Zabelinskii, and N. G. Bykova. "Simplified Kinetic Model of Kerosene Combustion." Russian Journal of Physical Chemistry B 15, no. 4 (2021): 637–44. http://dx.doi.org/10.1134/s1990793121040163.

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28

Baulch, D. L., C. J. Cobos, R. A. Cox, et al. "Evaluated Kinetic Data for Combustion Modelling." Journal of Physical and Chemical Reference Data 21, no. 3 (1992): 411–734. http://dx.doi.org/10.1063/1.555908.

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29

Frassoldati, Alessio, Alberto Cuoci, Alessandro Stagni, Tiziano Faravelli, and Eliseo Ranzi. "Skeletal kinetic mechanism for diesel combustion." Combustion Theory and Modelling 21, no. 1 (2016): 79–92. http://dx.doi.org/10.1080/13647830.2016.1222082.

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30

LINDSTEDT, R. P., and L. Q. MAURICE. "Detailed Kinetic Modelling of Toluene Combustion." Combustion Science and Technology 120, no. 1-6 (1996): 119–67. http://dx.doi.org/10.1080/00102209608935571.

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31

Boukhalfa, Nora. "Chemical Kinetic Modeling of Methane Combustion." Procedia Engineering 148 (2016): 1130–36. http://dx.doi.org/10.1016/j.proeng.2016.06.561.

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32

Benson, Sidney W. "Combustion, a chemical and kinetic view." Symposium (International) on Combustion 21, no. 1 (1988): 703–11. http://dx.doi.org/10.1016/s0082-0784(88)80302-3.

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33

Lindstedt, R. P. "The modelling of direct chemical kinetic effects in turbulent flames." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 214, no. 3 (2000): 177–89. http://dx.doi.org/10.1243/0954410001531999.

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Combustion chemistry-related effects have traditionally been of secondary importance in the design of gas turbine combustors. However, the need to deal with issues such as flame stability, relight and pollutant emissions has served to bring chemical kinetics and the coupling of finite rate chemistry with turbulent flow fields to the centre of combustor design. Indeed, improved cycle efficiency and more stringent environmental legislation, as defined by the ICAO, are current key motivators in combustor design. Furthermore, lean premixed prevaporized (LPP) combustion systems, increasingly used f

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34

Li, Wen Yan, Xing Lei Liu, Qiu Luan Chen, and Feng Ming Chu. "The Performance Research on Reaction of Fe₂O₃/Al₂O₃ Oxygen Carrier and CO in Chemical-Looping Combustion Process." Advanced Materials Research 550-553 (July 2012): 974–78. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.974.

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Chemical-looping combustion (CLC) is a novel technology, which has inherent property of separating the greenhouse gas CO2, which uses oxygen carriers to transfer oxygen for combustion from air to fuel. The reactivity of Fe2O3/Al2O3 oxygen carrier was assessed by measuring their ability to oxidize CO. The kinetics and mechanism of oxygen carrier have been studied by TG and DTG techniques. The kinetic mechanism function of the reaction between Fe2O3/Al2O3 and CO has been built using the Coats-Redfern equation.

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35

Maspanov, Sergej, Igor Bogov, Alexander Smirnov, Svetlana Martynenko, and Vladimir Sukhanov. "Analysis of Gas-Turbine Type GT-009 M Low-Toxic Combustion Chamber with Impact Cooling of the Burner Pipe Based on Combustion of Preliminarily Prepared Depleted Air–Fuel Mixture." Energies 15, no. 3 (2022): 707. http://dx.doi.org/10.3390/en15030707.

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This article analyzes the mechanism of formation of the main components of harmful emissions characteristic of combustion chambers operating on conventional hydrocarbon fuels. The method of combustion of a preliminarily prepared depleted air–fuel mixture was chosen as the object of the study. This method of suppressing harmful emissions was implemented in the design of a low-toxic combustion chamber developed as applied to the GT-009 M type unit with impact cooling of the burner pipe and provides for stabilization of the main kinetic flame by means of a diffusion-kinetic and a standby burner d

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Zhang, Yong Feng, Quan Zhou, Chun Ping Li, Jie Bai, and Xiang Yun Chen. "Experiment of Sheng Li Lignite Combustion Kinetics under Oxygen-Enriched Conditions." Advanced Materials Research 838-841 (November 2013): 1949–52. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.1949.

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The characteristics of Sheng Li (China) Lignite combustion under oxygen-enriched conditions were studied by thermogravimetric analysis , including TGDTG and DTA. Experiments on lignite combustion were carried out under four kinds of oxygen-enriched conditions (O2/N2mixture atmospheres) and with a heating rate of 10°C/min. The experiments of working temperature range was 20°C-900°C. The combustion process, regarded as the first order reaction, was analyzed through the Gorbachev kinetic equation participants, which gained the conclusion that Sheng Li lignite combustion reaction shift to low temp

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Chen, Junjie, Baofang Liu, Xuhui Gao, and Deguang Xu. "Computational Fluid Dynamics Simulations of Lean Premixed Methane-Air Flame in a Micro-Channel Reactor Using Different Chemical Kinetics." International Journal of Chemical Reactor Engineering 14, no. 5 (2016): 1003–15. http://dx.doi.org/10.1515/ijcre-2015-0174.

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Abstract Flame temperature and structure are a useful tool for describing flame dynamics and flame stability, especially at the micro-scale. The objective of this study is to examine the effect of different kinetic models (that have been proven to accurately predict the macro-combustion behavior of hydrocarbons) on the combustion characteristics and the flame stability in microreactors, and to explore the applicability of these kinetic models at the micro-scale. Computational fluid dynamics (CFD) simulations of lean premixed methane-air flame in micro-channel reactors were carried out to exami

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38

Ambrosi, Grigore. "IGNITION AND COMBUSTION OF SINGLE SOLID PARTICLES AS NON-ISOTHERMAL METHODS OF CHEMICAL KINETICS." Journal of Engineering Science 28, no. 3 (2021): 64–70. http://dx.doi.org/10.52326/jes.utm.2021.28(3).04.

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The ignition and combustion of single particles of crystalline boron continue to produce major scientific interest due to the particularities of the process and diversity of potential applications of boron compounds. The full valorization of boron energetic potential is a very current scientific challenge. The objective of the paper is to systematize the methodology for evaluating the kinetic parameters of boron ignition and combustion reactions in various oxidizing gaseous environments. Experimental dependencies between the ignition temperature and the particle size, as well as the combustion

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39

Fooladgar, Ehsan, and C. K. Chan. "Large Eddy Simulation of a Swirl-Stabilized Pilot Combustor from Conventional to Flameless Mode." Journal of Combustion 2016 (2016): 1–16. http://dx.doi.org/10.1155/2016/8261560.

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This paper investigates flame and flow structure of a swirl-stabilized pilot combustor in conventional, high temperature, and flameless modes by means of a partially stirred reactor combustion model to provide a better insight into designing lean premixed combustion devices with preheating system. Finite rate chemistry combustion model with one step tuned mechanism and large eddy simulation is used to numerically simulate six cases in these modes. Results show that moving towards high temperature mode by increasing the preheating level, the combustor is prone to formation of thermalNOxwith hig

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Kong, S. C., and R. D. Reitz. "Use of Detailed Chemical Kinetics to Study HCCI Engine Combustion With Consideration of Turbulent Mixing Effects." Journal of Engineering for Gas Turbines and Power 124, no. 3 (2002): 702–7. http://dx.doi.org/10.1115/1.1413766.

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Detailed chemical kinetics was used in an engine CFD code to study the combustion process in HCCI engines. The CHEMKIN code was implemented in KIVA such that the chemistry and flow solutions were coupled. The reaction mechanism consists of hundreds of reactions and species and is derived from fundamental flame chemistry. Effects of turbulent mixing on the reaction rates were also considered. The results show that the present KIVA/CHEMKIN model is able to simulate the ignition and combustion process in three different HCCI engines including a CFR engine and two modified heavy-duty diesel engine

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Komarov, I. I., D. M. Kharlamova, A. N. Vegera та V. Y. Naumov. "Study on effect CO2 diluent on fuel cоmbustion in methane-oxygen combustion chambers". Vestnik IGEU, № 2 (30 квітня 2021): 14–22. http://dx.doi.org/10.17588/2072-2672.2021.2.014-022.

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Studying closed gas turbine cycles on supercritical carbon dioxide is currently a promising issue in the development of power energy sector in terms of increasing energy efficiency and minimizing greenhouse gas emissions into the atmosphere. Combustion of methane with oxygen in the combustion chamber occurs not in the nitrogen environment, but in the environment of carbon dioxide, that is the working fluid of the cycle, which is an inhibitor of chemical reactions. A large mass content of such a diluent of the reaction mixture in the volume of the chamber leads to the risks of significant chemi

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Barysheva, Olga, Renat Sadykov, Yuri Khabibullin, and Elizaveta Zheltukhina. "Forecasting of an output of eco toxicants at thermal decomposition of chemical fuel." E3S Web of Conferences 140 (2019): 08002. http://dx.doi.org/10.1051/e3sconf/201914008002.

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Combustion of high-energy chemical fuels containing chlorine in the element structure can lead to formation in the particles of smoke of super eco toxicants—the polychlorinated dioxins and furans. The numerical experiment conducted was based on solution of the equations of chemical kinetics. The computational and theoretical researches directed to the solution of a problem of determination of parameters of combustion products of chemical fuels taking into account formation of harbingers of the polychlorinated dioxins were executed. The main data on the accepted method of determination of diseq

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Mai, Tam V. T., Thanh Q. Bui, Nguyen Thi Ai Nhung, et al. "An Ab Initio RRKM-Based Master Equation Study for Kinetics of OH-Initiated Oxidation of 2-Methyltetrahydrofuran and Its Implications in Kinetic Modeling." Energies 16, no. 9 (2023): 3730. http://dx.doi.org/10.3390/en16093730.

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Cyclic ethers (CEs) can be promising future biofuel candidates. Most CEs possess physico-chemical and combustion indicators comparable to conventional fuels, making them suitable for internal combustion engines. This work computationally investigates the kinetic behaviors of hydrogen abstraction from 2-methyl tetrahydrofuran (2MTHF), one of the promising CEs, by hydroxyl radicals under combustion and atmospheric relevant conditions. The various reaction pathways were explored using the CCSD(T)/cc-pVTZ//M06-2X/aug-cc-pVTZ level of theory. The Rice–Ramsperger–Kassel–Marcus-based master equation

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Yang, Guisheng, Zhihong Yang, Jinliang Zhang, Zhanhai Yang, and Jiugang Shao. "Combustion Characteristics and Kinetics Study of Pulverized Coal and Semi-Coke." High Temperature Materials and Processes 38, no. 2019 (2019): 783–91. http://dx.doi.org/10.1515/htmp-2019-0034.

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AbstractCombustion process of bituminous coal, steam coal, anthracite (AC) and semi-coke were investigated through thermogravimetric analysis method and influence of metamorphic grade as well as heating rate on combustion characteristics were analyzed. Results show that combustion performance could not be represented by single combustion characteristic parameter. Through analysis of comprehensive combustion characteristic indexes, with increase of metamorphic grade combustion performance of coal is lowered, and combustion performance of semi-coke and AC are close to each other. With increase o

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Zhang, Chuan Mei, Jing Jin, Dan Dan He, et al. "Reaction Mechanism Study on Combustion of Micro Nanometer Iron Powder." Advanced Materials Research 535-537 (June 2012): 459–64. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.459.

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Thermogravimetric curves of micro nanometer iron powder’s combustion were studied in different heating rates that were 10K/min, 20 K/min, 30 K/min and 40 K/min, and the particle sizes of iron were 100nm and 20μm. The iron’s kinetic parameters of combustion reaction were calculated by Coats-Redfern integral, differential and Kissinger methods, then the kinetic model was determined and the most probable mechanism function was verified by Popescu method. The results show that different heating rates, particle sizes and calculations can affect kinetic parameters and reaction mechanism. The activat

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Xiang, Dong, and Weihua Zhu. "Mechanisms and kinetics of initial pyrolysis and combustion reactions of 1,1-diamino-2,2-dinitroethylene from density functional tight-binding molecular dynamics simulations." Canadian Journal of Chemistry 97, no. 11 (2019): 795–804. http://dx.doi.org/10.1139/cjc-2019-0141.

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The density functional tight-binding molecular dynamics approach was used to study the mechanisms and kinetics of initial pyrolysis and combustion reactions of isolated and multi-molecular FOX-7. Based on the thermal cleavage of bridge bonds, the pyrolysis process of FOX-7 can be divided into three stages. However, the combustion process can be divided into five decomposition stages, which is much more complex than the pyrolysis reactions. The vibrations in the mean temperature contain nodes signifying the formation of new products and thereby the transitions between the various stages in the

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Zhang, Jun Jiao, Xu Ming Zhang, Da Long Jiang, et al. "Research on TG-DTG Analysis and Combustion Kinetics Characteristic of Biomass Fly Ash and Ash." Applied Mechanics and Materials 130-134 (October 2011): 396–400. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.396.

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The fly ash and ash of different biomass power plants are selected as research objects, of which the combustion characteristics are studied. At the heating rates of 50°C/min, at the final reaction temperature of 900°C, and under the condition of air as carrier gas, weight loss curve and weight loss rate curve are analyzed respectively. TG, DTG curves of fly ash and ash from different power plant are gained, different combustion conditions are studied, and combustion kinetic equations of different biomass fly ash and ash are established, kinetics parameters are obtained by the Coats-Redfern met

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Qu, Li Na, Yuan Gang Jiang, and Ru Le Gao. "The Research on the Relationship between the Coal Volatile and the Kinetics Parameters by Thermo-Gravimetric Experiment." Advanced Materials Research 512-515 (May 2012): 1813–18. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1813.

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Coal spontaneous combustion is a common coal mine disaster, the internal mechanism of coal combustion is revealed better by researched the relationship between the coal volatile and the kinetics parameters. Based on the method of non-isothermal, the coal samples from Jinggezhuang9#, Jinggezhuang11#, Qianjiaying, Tangshan and Tunlan are used the thermo-gravimetric experiment. The relationship between the reactive kinetic parameter and the volatile matter are fond out, when the heating rate is 100C/min. The experiment results illustrate that the more the volatile matter is, the less the activati

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Mansha, M., A. R. Saleemi, and Badar M. Ghauri. "Kinetic models of natural gas combustion in an internal combustion engine." Journal of Natural Gas Chemistry 19, no. 1 (2010): 6–14. http://dx.doi.org/10.1016/s1003-9953(09)60024-4.

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Thanatawee, Phattharanid, Wanwisa Rukthong, Sasithorn Sunphorka, Pornpote Piumsomboon, and Benjapon Chalermsinsuwan. "Effect of Biomass Compositions on Combustion Kinetic Parameters using Response Surface Methodology." International Journal of Chemical Reactor Engineering 14, no. 1 (2016): 517–26. http://dx.doi.org/10.1515/ijcre-2015-0082.

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AbstractThe aim of this research is to find the correlation between chemical compositions of biomass, including cellulose, hemicelluloses and lignin, and kinetic rates of biomass combustion. The combustion behavior of biomass constituent was studied by thermogravimetric analyzer. The correlations were generated by means of using Response Surface Methodology based on Simplex-Lattice experimental design. The results obtained from statistical analysis can be used to generate mathematical models and also contour plots which exhibited the relationship between biomass composition and its combustion

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