Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal
The paper presents a detailed kinetic study on H2S formation during fuel-rich combustion of pulverized coal via tube furnace experiment and kinetic analysis with Chemkin. A new detailed kinetic model involving 34 species and 115 reactions was developed, with emphasis on CS2 as a source for H2S. The...
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sg-ntu-dr.10356-1595162022-06-27T02:59:13Z Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal Ma, Honghe Lv, Sichen Zhou, Lu Chew, Jia Wei Zhao, Jun School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Science::Chemistry Detailed Kinetic Modeling Pulverized Coal The paper presents a detailed kinetic study on H2S formation during fuel-rich combustion of pulverized coal via tube furnace experiment and kinetic analysis with Chemkin. A new detailed kinetic model involving 34 species and 115 reactions was developed, with emphasis on CS2 as a source for H2S. The novel model was validated using experimental data with respect to the concentration distributions of H2, CO, H2O, CO2, SO2, H2S, COS and CS2. Sensitivity analysis shows that H2S concentration was very sensitive to reactions (2) H2S + H = SH + H2, (89) SO2 + CO = SO + CO2, (104) COS + H2O = H2S + CO2, (62) HOSO (+M) = H + SO2 (+M), (103) CS2 + H2O = H2S + COS, etc. Also, SH, S, and SO were the key free radicals for H2S production. Rate of production analysis (ROP) were also performed, which indicate that SH was the most important precursor of H2S. Based on the detailed kinetic model and ROP analysis, the simplified reaction path of H2S formation was constructed. Finally, the new model was compared with the Leeds University sulfur chemistry model. The two models have the same key free radicals and four major elementary reactions. The main difference is that CS2 was a notable source for H2S in our model targeted for coal combustion, and should be given special attention. The work was supported by the National Natural Science Foundation of China (Grant No. 51706151); Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (STIP) (Grant No. 2019L0147); and Major Special Projects for the Innovative Demonstration Zone Construction of National Sustainable Development Agenda in Taiyuan. 2022-06-27T02:59:13Z 2022-06-27T02:59:13Z 2020 Journal Article Ma, H., Lv, S., Zhou, L., Chew, J. W. & Zhao, J. (2020). Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal. Fuel Processing Technology, 199, 106276-. https://dx.doi.org/10.1016/j.fuproc.2019.106276 0378-3820 https://hdl.handle.net/10356/159516 10.1016/j.fuproc.2019.106276 2-s2.0-85074747163 199 106276 en Fuel Processing Technology 2019 Elsevier B.V. All rights reserved. |
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Science::Chemistry Detailed Kinetic Modeling Pulverized Coal Ma, Honghe Lv, Sichen Zhou, Lu Chew, Jia Wei Zhao, Jun Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal |
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The paper presents a detailed kinetic study on H2S formation during fuel-rich combustion of pulverized coal via tube furnace experiment and kinetic analysis with Chemkin. A new detailed kinetic model involving 34 species and 115 reactions was developed, with emphasis on CS2 as a source for H2S. The novel model was validated using experimental data with respect to the concentration distributions of H2, CO, H2O, CO2, SO2, H2S, COS and CS2. Sensitivity analysis shows that H2S concentration was very sensitive to reactions (2) H2S + H = SH + H2, (89) SO2 + CO = SO + CO2, (104) COS + H2O = H2S + CO2, (62) HOSO (+M) = H + SO2 (+M), (103) CS2 + H2O = H2S + COS, etc. Also, SH, S, and SO were the key free radicals for H2S production. Rate of production analysis (ROP) were also performed, which indicate that SH was the most important precursor of H2S. Based on the detailed kinetic model and ROP analysis, the simplified reaction path of H2S formation was constructed. Finally, the new model was compared with the Leeds University sulfur chemistry model. The two models have the same key free radicals and four major elementary reactions. The main difference is that CS2 was a notable source for H2S in our model targeted for coal combustion, and should be given special attention. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Ma, Honghe Lv, Sichen Zhou, Lu Chew, Jia Wei Zhao, Jun |
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Article |
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Ma, Honghe Lv, Sichen Zhou, Lu Chew, Jia Wei Zhao, Jun |
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Ma, Honghe |
title |
Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal |
title_short |
Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal |
title_full |
Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal |
title_fullStr |
Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal |
title_full_unstemmed |
Detailed kinetic modeling of H₂S formation during fuel-rich combustion of pulverized coal |
title_sort |
detailed kinetic modeling of h₂s formation during fuel-rich combustion of pulverized coal |
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2022 |
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https://hdl.handle.net/10356/159516 |
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1736856374658203648 |