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Analysis of Non-Catalytic and Catalytic Steam Gasification of Hohhot Coal Char
Asian Journal of Chemistry,
Vol. 25 No. 13 (2013): Vol 25 Issue 13
Abstract
Steam gasification of Hohhot coal char, demineralized Hohhot coal char and several catalysts loaded samples including alkali, slaked lime and transition metal based compounds was performed under 700 ºC and atmospheric pressure. A three-step steam gasification mechanism based on carbon-oxygen intermediate C(O) is proposed for the understanding of experimental data regarding both the kinetic behavior and reaction selectivity. The characteristics of reaction rate and the selectivity of CO, CO2 and C(O) under the effect of different catalysts were discussed. It was found that the catalyst is more effective for the H2O involved reaction steps which is probably due to the oxygen transfer function of catalyst from H2O to carbon surface.
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