期刊
CHEMCATCHEM
卷 8, 期 18, 页码 2903-2906出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201600469
关键词
carbon dioxide capture; heterogeneous catalysis; hydrotalcite; methanation; nickel
The CO2 methanation performance of a Ni catalyst supported on a Lewis basic (Mg,Al)Ox mixed oxide derived from a (Ni, Mg, Al)-hydrotalcite-like (HTL) precursor was investigated. The HTL structure of the precursor, synthesized by pH-controlled coprecipitation, was confirmed by using XRD. Reduction at 900 degrees C led to metallic Ni particles supported on a spinel-type (Mg, Al) Ox matrix. Catalytic measurements between 210 and 400 degrees C revealed a reproducible CO2 conversion into CH4. Kinetic analysis of the data in the lower temperature range resulted in an apparent activation energy of (83 +/- 7) kJ mol(-1) for this reaction. After a latency period of 10 h, the catalyst showed excellent long-term stability for up to 50 h on stream under methanation conditions.
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