期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 40, 期 24, 页码 7424-7432出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.02.110
关键词
Supercritical water gasification; Coal; Reaction kinetics; Pathway
资金
- State Key Program of National Natural Science Foundation of China [51236007]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51121092]
China has fairly rich reserves of Zhundong coal but the utilization of it is limited due to the high alkali metal content which can cause great troubles in a traditional boiler. Supercritical water gasification is a novel thermochemical conversion technique to convert wet feedstock into hydrogen-rich gas product with near zero emission. Reaction kinetics of Zhundong coal gasification in supercritical water was investigated with a quartz reactor in this study. The effects of reaction temperature (650-850 degrees C) and coal concentration (5-15 wt%) on the gasification behavior were investigated in a wide range of residence time (0-30 min). Experimental results showed that the experimental method employed presents good performance in revealing the continuous change of gas formation with residence time. Carbon gasification efficiency can reach nearly 100% at 850 degrees C with the residence time of 15 min and the mole fraction of hydrogen was more than 50%. A simplified gasification reaction pathway was also claimed at the end. The results show a promising prospect of Zhundong coal conversion in supercritical water and provide some useful information for reaction kinetics model establishment of coal gasification in supercritical water. Copyright (c) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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