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Molecules 2003, 8(1), 13-30; doi:10.3390/80100013
Article

Alcohol Synthesis over Pre-Reduced Activated Carbon-Supported Molybdenum-Based Catalysts

1,* , 1, 1, 2
 and 2
Received: 1 January 2003; Published: 31 January 2003
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Abstract: Activated carbon (AC)-supported molybdenum catalysts, either with or without a potassium promoter, were prepared by the incipient wetness impregnation method. The materials were characterized using differential thermal analysis (DTA) and temperature programmed reduction (TPR), and were used for mixed alcohol synthesis from syngas (CO+H2). DTA results showed that a new phase, related to the interaction between Mo species and the AC support, is formed during the calcination of the Mo/AC catalyst, and the introduction of a K promoter has noticeable effect on the interaction. TPR results indicated that the Mo is more difficult to reduce after being placed onto the AC support, and the addition of a K promoter greatly promotes the formation of Mo species reducible at relatively low temperatures, while it retards the generation of Mo species that are reducible only at higher temperatures. These differences in the reduction behavior of the catalysts are atributed to the interaction between the active components (Mo and K) and the support. Potassium-doping significantly promotes the formation of alcohols at the expense of CO conversion, especially to hydrocarbons. It is postulated that Mo species with intermediate valence values (averaged around +3.5) are more likely to be the active phase(s) for alcohol synthesis from CO hydrogenation, while those with lower Mo valences are probably responsible for the production of hydrocarbons.
Keywords: Alcohol synthesis; molybdenum; activated carbon; DTA; TPR Alcohol synthesis; molybdenum; activated carbon; DTA; TPR
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Li, X.; Feng, L.; Zhang, L.; Dadyburjor, D.B.; Kugler, E.L. Alcohol Synthesis over Pre-Reduced Activated Carbon-Supported Molybdenum-Based Catalysts. Molecules 2003, 8, 13-30.

AMA Style

Li X, Feng L, Zhang L, Dadyburjor DB, Kugler EL. Alcohol Synthesis over Pre-Reduced Activated Carbon-Supported Molybdenum-Based Catalysts. Molecules. 2003; 8(1):13-30.

Chicago/Turabian Style

Li, Xianguo; Feng, Lijuan; Zhang, Lijun; Dadyburjor, Dady B.; Kugler, Edwin L. 2003. "Alcohol Synthesis over Pre-Reduced Activated Carbon-Supported Molybdenum-Based Catalysts." Molecules 8, no. 1: 13-30.



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