期刊
JOURNAL OF THE ENERGY INSTITUTE
卷 79, 期 3, 页码 187-190出版社
ELSEVIER SCI LTD
DOI: 10.1179/174602206X117814
关键词
chemical looping; coal gasification; coal combustion; CO2 sequestration
In chemical looping combustion (CLC), a metal oxide ( generalised as MeO) is used to oxidise a gaseous fuel in: (2n+m) MeO+CnH2m-->(2n+m) Me+mH(2)O+nCO(2). Pure CO2 can then be obtained by cooling the off-gases to condense the steam. The reduced form of the metal oxide, Me, is then transferred to a different reactor, where it is re-oxidised by air in: Me+1/2O(2)-->MeO. The gas from this reactor is N-2 containing unused O-2. The net effect of these reactions is that the fuel has been burned, with the total heat evolved being the same as for combustion of the fuel in air; however, the resulting CO2 is now pure and not mixed with the nitrogen from the air. This paper shows how it is possible to use CLC with a solid fuel, such as coal char, provided a gasification agent like steam is introduced into the reactor. The gasification agent transfers solid carbon to gaseous CO, which, like the H-2 also formed, can be reacted with a solid, e. g. Fe2O3, carrying oxygen, to yield CO2 and H2O. On the basis of a limited series of experiments, the reaction of sintered compacts of Fe2O3 appears to be sufficient to make a semi-batch process feasible when used with steam.
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