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Dry reforming of methane over Co-Mo/Al2O3 catalyst at low microwave power irradiation

Abstract

In this work, microwave (MW) was used to activate Co/Al2O3, Mo/Al2O3, and Co-Mo/Al2O3 catalysts for DRM reaction. Experimental results indicate that single metallic catalyst of either Co or Mo is inactive for dry reforming of methane (DRM) under all tested conditions due to its limited MW absorbing ability. In contrast, the Co-Mo bimetallic catalysts supported by Al2O3 performs high catalytic activity due to the formation of magnetodielectric Co0.82Mo0.18 alloy, which is playing the dual role to be a good MW acceptor and to provide active centers for DRM reaction. MW power level required to activate bimetallic catalysts for DRM is significantly dependent on the molar ratio between cobalt and molybdenum. CoMo2 catalyst (with a molar ratio of 2.0 Co: 1.0 Mo) supported on Al2O3 displays the best catalytic performance converting 80 % CH4 and 93 % CO2 to syngas with the ratio of H2/CO at 0.80 at the total volumetric hourly space velocity (VHSV) of 10 L.g-1.h-1 and 200 W. Compared to the reported carbon-based catalysts, Co-Mo/Al2O3 catalyst delivers a more favourable stability over 16 time-on-stream (TOS) by virtue of its intrinsic ability to absorb MW without the inclusion of auxiliary MW-acceptor.

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Publication details

The article was received on 02 Aug 2018, accepted on 09 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8CY01601A
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Dry reforming of methane over Co-Mo/Al2O3 catalyst at low microwave power irradiation

    H. M. Nguyen, G. H. Pham, R. Ran, R. Vagnoni, V. Pareek and S. Liu, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY01601A

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