期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 6, 页码 4945-4954出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.12.062
关键词
Dry reforming of biogas; Syngas; Plasma; Pressurization
资金
- National Natural Science Foundation of China [51077009]
- Fundamental Research Funds for the Central Universities
To produce high-concentration syngas (CO + H-2) from biogas, the effect of pressurization on dry reforming of biogas (CH4/CO2 = 60%/40%) in kilohertz spark-discharge plasma was reported for the first time by elevating the pressure from 1 bar to 2 bar. It was found that elevating the pressure could not only increase the reactant conversions, but also reduce energy cost and increase fuel-production efficiency at the same specific energy input (SE!). In particular, pressurization exhibited a significantly positive effect on increasing CO2 conversion and decreasing energy cost for converting CO2. Syngas concentration as high as 83% (H-2/CO = 1.4) was achieved with a ratio of the flow rates of product gas (dry basis) to feeding gas, 1.7, at 2 bar and SEI = 753 kJ/mol. The by-product, H2O, was produced with only about 5% of hydrogen-based selectivity in this work. At 2 bar, the effect of SEI was investigated by varying the power and flow rate, respectively. Compared with those at 1 bar, with the increase in SE!, reactants conversion increased fast, energy cost rose slowly and fuel-production efficiency decreased slowly at 2 bar. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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