文献类型：期刊文献

英文题名：Investigation of hydrogasification of low-rank coals to produce methane and light aromatics in a fixed-bed reactor

作者：Zhang, Jie[1];Wang, Xingjun[1];Wang, Fuchen[1];Wang, Jie[1]

机构：[1]E China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China

年份：2014

卷号：127

起止页码：124

外文期刊名：FUEL PROCESSING TECHNOLOGY

收录：;EI(收录号：20142817933646);WOS:【SCI-EXPANDED(收录号:WOS:000340976500018)】；

基金：This work is funded by the National "863" Scientific Research Program (2011AA05A201) and the National Natural Science Foundation of China (Grand No. 21376080).

语种：英文

外文关键词：Coal hydrogasification; Methane; Tar; Char hydrogenation

摘要：The hydrogasification of three low rank coals (YX lignite, XD lignite and ZD subbituminous coal) was carried out in a fixed-bed reactor to investigate the effects of hydrogen pressure on the formations of gaseous, liquid and char products. The reactor was typically heated at a rate of 15 degrees C/min up to 700 degrees C with a holding time of 60 min under various hydrogen pressures up to 5 MPa. The yields of BTX (i.e., benzene, toluene, and xylene) and naphthalene increased with increasing hydrogen pressure up to 5 MPa for all three coals, but more significant for XD and ZD coals. The compositional analysis of char revealed that the chars produced by the hydrogasification had higher molar ratios of H/C and lower molar ratios of N/C than those produced by the pyrolysis in N-2 atmosphere, whereas the former chars had higher or lower molar ratios of S/C than the latter chars from case to case depending principally on coals. The apparent reaction rate constants of the chars hydrogasification in the isothermal stage as a function of hydrogen pressure were found to follow a power equation of the power exponents varying with coals. (C) 2014 Elsevier B.V. All rights reserved.