期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 3, 页码 2917-2926出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.06.061
关键词
Supercritical water gasification; Catalysis mechanism; Hydrogen production; Depolymerizing slag; Synergistic catalyst
资金
- National Natural Science Foundation of China [51922086]
The study investigates the supercritical water gasification of depolymerizing slag with different catalysts, revealing the distinct catalysis mechanisms of K2CO3 and Ru/Al2O3. The binary catalyst demonstrates a strong synergistic effect in enhancing gasification efficiency and hydrogen yield, outperforming single catalysts. In conclusion, mastering catalysis mechanisms and utilizing synergistic catalysts are key factors in improving gasification efficiency.
Supercritical water gasification technology can realize efficient conversion of biomass, coal and other organics into hydrogen rich gas. But the efficiency of non-catalytic gasification at relative low temperature is not high. Besides, as for catalytic gasification, catalysis mechanism is complex. Thus how to improve efficiency and master the catalysis mechanism is a challenging issue. In this thesis, supercritical water gasification of depolymerizing slag experiments with the catalysis of different kinds of catalysts are conducted and the catalysis mechanism is analyzed. The results indicate that catalyst mechanism of K2CO3 is that it can promote the swelling and hydrolysis of lignocellulose and increase the amounts of phenolic intermediates. Ru/Al2O3 presents some different catalytic properties. It facilitates hydrogenation reaction of hydrolysis products, ring opening reaction and the cleavage of carbon-carbon bonds then enhances gasification degree and increases gasification efficiency. Moreover, the binary catalyst displays a good synergic effect and the catalytic activity is higher than that of any single catalyst since these two catalysts promote various gasification stages. The gasification efficiency and hydrogen yield increase 13.22 mmol g(-1) and 66.46% respectively with the synergic catalyst of K2CO3 and Ru/Al2O3. (c) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据