INTEGRATED COAL PYROLYSIS WITH CO2 REFORMING OF METHANE FOR IMPROVING TAR YIELD
IntroductionHydropyrolysis is an effective method for improving tar yield and quality compared with pyrolysis under N2, but the high cost of hydrogen limits its practical application. Methane, the main composition of natural gas and coal-bed gas, is proposed to be the hydrogen substitute in hydropyrolysis. Egiebor and Gray 1investigated Highvale coal pyrolysis under CH4 and Ar, and it was found that coal conversion in pyrolysis under CH4 was higher than that in pyrolysis under Ar. Liao et al. 2 studied pyrolysis of Chinese Xianfeng lignite under coke oven gas at 650℃. The results showed that the tar yield and all the yields of BTX, PCX and naphthalene in pyrolysis products were higher than those from hydropyrolysis at the same hydrogen partial pressure. Smith et al. 3 found that larger amounts of liquid products were formed when IBCSP coal No.5 samples were treated with CH4/NO and CH4/O2 in the autoclave reactor. In our previous studies, we found that the tar yield was 1.7 times as that in pryolysis under H2 when Yanzhou coal pyrolysis at 700 ℃ in the mixture gas of CH4/O2 (4/1). In this paper, a novel integrated process of coal pyrolysis and CO2 reforming of methane over Ni/MgO catalyst was put forward. The effect of pyrolysis temperature, coal sample, Ni loading in Ni/MgO catalyst on tar, water yield and CH4 conversion was studied in detail. Meanwhile, the catalytic behaviors of Ni/MgO catalyst were investigated by X-ray diffraction (XRD).
Jiahe Liu Haoquan Hu Pengfei Wang Lijun Jin
Institute of Coal Chemical Engineering Dalian University of Technology 129 street,Dalian116012, P.R. Institute of Coal Chemical Engineering Dalian University of Technology 129 street, Dalian116012, P.R
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
3-4
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）