Hydrogen production by non-catalytic partial oxidation of coal in supercritical water: The study on reaction kinetics |
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| Authors: | Zhiwei Ge Liejin Guo Hui Jin |
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| Affiliation: | 1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;2. Huadian Electircal Power Research Institute, Hang Zhou, 310030, China |
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| Abstract: | Supercritical water gasification (SCWG) has attracted great attention for efficient and clean coal conversion recently. A novel kinetic model of non-catalytic partial oxidation of coal in supercritical water (SCW) that describes formation and consumption of gas products (H2, CO, CH4 and CO2) is reported in this paper. The model comprises 7 reactions, and the reaction rate constants are obtained by fitting the experimental data. Activation energy analysis indicates that steam reforming of fixed carbon (FC) is the rate-determining step for the complete gasification of coal. Once CH4 is produced by pyrolysis of coal, steam reforming of CH4 will be the rate-determining step for directional hydrogen production. |
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| Keywords: | Supercritical water Coal Hydrogen production Reaction kinetics Partial oxidation |
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