ScienceDirect - Fuel Processing Technology : Integrated coal pyrolysis with CO2 reforming of methane over Ni/MgO catalyst for.
In further support of the earlier documentation we've submitted, that Carbon Dioxide could actually be employed to improve the production of liquid hydrocarbons from processes of Coal conversion, we present, from China, additional evidence, not only of the fact that CO2 can be productively recycled, but that such recycling can be accomplished as part of an indirect Coal conversion process to generate greater amounts of useful products.
With comment appended, we present excerpts from:
"Integrated coal pyrolysis with CO2 reforming of methane
Jiahe Liu, Haoquan Hu, Lijun Jin, Pengfei Wang and Shengwei Zhu State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, 129 street, Dalian 116012, PR China
May 2009.
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 ... 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 C over 10 wt.% Ni/MgO catalyst reduced at 850 C. The tar yield is 1.6 and 1.8 times as that in coal pyrolysis under H2 and N2, respectively."
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As we read this, and in other words, supplemental Carbon Dioxide can be added to Methane-rich gasses arising from Coal pyrolysis to nearly double, "1.6 and 1.8 times", the production of tars which can then be further refined into various commercial hydrocarbons.