Oxy-CO2 reforming and Oxy-CO2 steam reforming of methane to syngas over CoxNi1-xO/MgO/SA-5205
Metadata of CSIR Papers
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| Title |
Oxy-CO2 reforming and Oxy-CO2 steam reforming of methane to syngas over CoxNi1-xO/MgO/SA-5205
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| Creator |
Choudhary, VR
Mamman, AS Uphade, BS |
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| Subject |
Energy & Fuels; Engineering, Environmental; Environmental Sciences
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| Description |
OXY-CO2 reforming and simultaneous OXY-CO2 and steam reforming of methane, involving coupling of exothermic oxidative conversion and endothermic steam and/or CO2 reforming of methane over CoxNi1-xO (14 +/- 0.5 wt%)/MgO (7.6 wt%)/SA-5205 (x = 0.0 - 0.5) catalysts (where SA-5205 is a sintered low surface area macroporous silica-alumina catalyst carrier, obtained from Norton, USA) have been thoroughly investigated. Effect of Co/Ni ratio of the catalyst on its performance in these two methane-to-syngas conversion processes has been studied. For the OXY-CO2 reforming process, the Co/Ni ratio has a strong influence on the conversion of methane and CO2 and also on the selectivity for H-2. The optimum Co/Ni ratio for this process was found to be 0.17. However, for the simultaneous OXY-CO2 and steam reforming process, Co/Ni ratio has a strong influence on the conversion Of CO2 and H2O, depending upon the process conditions, but has a little or no influence on the methane conversion and the H-2/CO ratio. Hence, in this process, the catalyst with Co/Ni ratio of 1.0, which has lower activity for the filamental carbon formation, is more preferable. In this process (at 850degreesC), the catalyst (with Co/Ni = 1.0) shows very high methane conversion activity (97% conversion) and 100% selectivity (based on methane) for both CO and H2 at a low contact time (15 ms) and the H-2/CO ratio can be controlled by manipulating the CO2/H2O feed ratio. In both the processes, the exothermic oxidative conversion and endothermic steam and/or CO2 reforming reactions over the catalyst occur simultaneously, involving coupling of the exothermic and endothermic reactions. Because of this, these processes are highly energy efficient and also non-hazardous or safe to operate. Moreover, by manipulating the process conditions (viz., temperature and CH4/O-2 feed ratio], these processes can be made mildly endothermic, near thermoneutral or mildly exothermic.
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| Publisher |
KLUWER ACADEMIC/PLENUM PUBLNEW YORK233 SPRING ST, NEW YORK, NY 10013 USA
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| Date |
2011-09-24T09:37:44Z
2011-09-24T09:37:44Z 2002 |
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| Type |
Proceedings Paper
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| Identifier |
ENVIRONMENTAL CHALLENGES AND GREENHOUSE GAS CONTROL FOR FOSSIL FUEL UTILIZATION IN THE 21ST CENTURY
0-306-47336-4 http://hdl.handle.net/123456789/24179 |
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| Language |
English
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