Characterization of gases and solid residues from closed system pyrolysis of peat and coals at two heating rates
会议名称：《中国科学院地质与地球物理研究所第11届（2011年度）学术年会》
会议日期：2012年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
基 金：supported by the National Natural Science Foundation of China(Grant Nos.40872092 and 407720691) the“973”Program of China(Grant No.2002CB211701)
关 键 词：Pyrolysis Coal Peat Gas generation Vitrinite reflectance
摘 要：Closed system gold-tube pyrolysis experiments were performed on a peat and two coals(TY:R = 0.51%;SX:R-0.94%) at temperatures ranging from 337 to 600℃and a pressure of 50 MPa with heating rates of 2 and/or 20℃/*** reaction residues were analyzed *** and chemical and isotopic compositions of the generated gases were also *** three samples had similar thermal evolution *** increasing heating temperature,vitrinite reflectances(VR) of the residues increased linearly from 0.72%to 4.50%.This increase was lesser for the sample with a higher hydrocarbon generation potential and at faster heating *** compositions are dominated by CO and CH throughout the experimental *** gas and CH yields gradually increase with pyrolysis temperature for all *** carbon isotopic compositions of CH generated from the peat are lighter than those from the ***δC(CH) values exhibit a generic evolution pattern which the initial CH is isotopically heavy,then becomes lighter at moderate temperatures,and finally becomes heavier *** produced from the samples at low heating rate has higher transformation ratio than that at high heating rate under the same temperature,so tends to be isotopically heavy after pyrolysis temperature of more than 408℃.