Effect of coal rank on steam gasification of coal/CaO mixtures
- Japan Coal Energy Center, Tokyo (Japan)
The effect of coal rank on hydrogen generation during the reaction of coal/CaO and char/CaO mixtures with high-pressure steam was investigated using a flow-type reactor, and the results were compared with the results for the gasification of the same coal and char sample in the absence of CaO. For the coal/CaO mixture, reactions of coal, CaO and CO with steam, and CO{sub 2} absorption by CaO occurred simultaneously in the reactor and H{sub 2} was the primary gas product. CO{sub 2} was fixed by CaCO{sub 3}, and CO was completely converted to H{sub 2}. The rates of H{sub 2} generation per mole of carbon in the coal (char) samples decreased in the order of lignite {gt} sub-bituminous {gt} bituminous. The rate of H{sub 2} generation seemed to be affected by both the reactivity and the carbon content of the coal. 8 refs., 9 figs., 2 tabs.
- OSTI ID:
- 20961445
- Journal Information:
- Energy and Fuels, Vol. 21, Issue 5; Other Information: slin@jcoal.or.jp; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
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