期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 34, 页码 18042-18050出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.06.198
关键词
Hydrogen; Supercritical water gasification; Thermodynamic analysis; Hydrogen to carbon ratio; Oxygen to carbon ratio
资金
- National Natural Science Foundation of China [51871179]
- China Postdoctoral Science Foundation [2019TQ0248]
This study investigates the thermodynamic equilibrium analysis of supercritical water gasification involving different feedstocks like coal, sewage sludge, microalgae, and sawdust. The results show that temperature and feed concentration play a crucial role in determining hydrogen yield, while pressure has minimal effects. An optimal feed concentration of 15-20 wt% is found for hydrogen production.
This study investigates the thermodynamic equilibrium analysis of the supercritical water gasification (SCWG) involving several typical feedstocks (coal, sewage sludge, microalga, and sawdust). The effects of various parameters including feed concentrations, temperatures, and pressures are analyzed. It is observed that temperature and feed concentration play a determining role in the yield of hydrogen, while the effect of pressure is very limited. Results show that the feed concentration of 15-20 wt% is optimal for hydrogen production. Furthermore, the effects of composition (hydrogen to carbon ratio and oxygen to carbon ratio) of the feedstock on the yield of product gases are investigated, which is useful for screening potential feedstock for SCWG. The results show that maximum H-2 and CH4 molar yields are achieved at a low O/C and a high H/C ratio. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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