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Simultaneous oxidative conversion and CO 2 or steam reforming of methane to syngas over CoO–NiO–MgO catalyst
Author(s) -
Choudhary Vasant R.,
Mamman Ajit S.
Publication year - 1998
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199812)73:4<345::aid-jctb961>3.0.co;2-#
Subject(s) - syngas , steam reforming , methane , oxidative coupling of methane , endothermic process , methane reformer , exothermic reaction , non blocking i/o , catalysis , partial oxidation , syngas to gasoline plus , carbon dioxide reforming , chemistry , chemical engineering , materials science , inorganic chemistry , organic chemistry , hydrogen production , adsorption , engineering
CO 2 reforming, oxidative conversion and simultaneous oxidative conversion and CO 2 or steam reforming of methane to syngas (CO and H 2 ) over NiO–CoO–MgO (Co: Ni: Mg=0·5: 0·5:1·0) solid solution at 700–850°C and high space velocity (5·1×10 5 cm 3 g −1 h −1 for oxidative conversion and 4·5×10 4 cm 3 g −1 h −1 for oxy‐steam or oxy‐CO 2 reforming) for different CH 4 /O 2 (1·8–8·0) and CH 4 /CO 2 or H 2 O (1·5–8·4) ratios have been thoroughly investigated. Because of the replacement of 50 mol% of the NiO by CoO in NiO–MgO (Ni/Mg=1·0), the performance of the catalyst in the methane to syngas conversion process is improved; the carbon formation on the catalyst is drastically reduced. The CoO–NiO–MgO catalyst shows high methane conversion activity (methane conversion >80%) and high selectivity for both CO and H 2 in the oxy‐CO 2 reforming and oxy‐steam reforming processes at ⩾800°C. The oxy‐steam or CO 2 reforming process involves the coupling of the exothermic oxidative conversion and endothermic CO 2 or steam reforming reactions, making these processes highly energy efficient and also safe to operate. These processes can be made thermoneutral or mildly exothermic or mildly endothermic by manipulating the process conditions (viz. temperature and/or CH 4 /O 2 ratio in the feed). © 1998 Society of Chemistry Industry