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Indexed by:期刊论文

Date of Publication:2010-04-01

Journal:7th China/Korea Workshop on Clean Energy Technology

Included Journals:SCIE、CPCI-S

Volume:91

Issue:4,SI

Page Number:419-423

ISSN No.:0378-3820

Key Words:Coal pyrolysis; CO2 reforming of methane; Tar yield; Ni/MgO catalyst

Abstract:A new process to integrate coal pyrolysis with CO2 reforming of methane over Ni/MgO catalyst was put forward for improving tar yield. And several Chinese coals were used to confirm the validity of the process. The experiments were performed in an atmospheric fixed-bed reactor containing upper catalyst layer and lower coal layer to investigate the effect of pyrolysis temperature, coal properties, Ni loading and reduction temperature of Ni/MgO catalysts on tar, water and char yields and CH4 conversion at fixed conditions of 400 ml/min CH4 flow rate, 1:1 CH4/CO2 ratio, 30 min holding time. The results indicated that higher tar yield can be obtained in the pyrolysis of all four coals investigated when coal pyrolysis was integrated with CO2 reforming of methane. For PS coal, the tar, water and char yield is 33.5, 25.8 and 69.5 wt.%, respectively and the CH4 conversion is 16.8%, at the pyrolysis temperature of 750 degrees C over 10 wt.% Ni/MgO catalyst reduced at 850 degrees C. The tar yield is 1.6 and 1.8 times as that in coal pyrolysis under H-2 and N-2, respectively. (C) 2009 Elsevier B.V. All rights reserved.