Abstract:
Steam gasification of coal is one of the efficient ways to produce syngas from coal. Steam gasification performance of four kinds of Mongolia coal was comprehensively investigated in this paper. The composition and the evolution rates of syngas were studied during steam gasification. The influence of thermodynamic equilibrium on the gasification reaction of four coal samples was also discussed. As research shown that the steam gasification performance of Baganuur coal (BN), Nalaik coal (NL) and Alagtogoo coal (AT) were significantly higher than that of Tawantolgoi coal (TT). The syngas contained high H2 and low CO contents producing by BN, NL and AT, however, TT produced the syngas which contain high CO content, since the water-gas shift reaction (WGSR) was carried out completely with high H2 and low CO production rates in steam gasification process of BN, NL and AT. Syngas of high CO content was produced from steam gasification of TT due to its low WGSR. Moreover, the thermodynamic equilibrium was one of the main factors led to the differences of steam gasification characteristics for the four kinds of Mongolia coal.
