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Catalysts 2014, 4(2), 116-128; doi:10.3390/catal4020116
Article

Selective Synthesis of Gasoline-Ranged Hydrocarbons from Syngas over Hybrid Catalyst Consisting of Metal-Loaded ZSM-5 Coupled with Copper-Zinc Oxide

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Faculty of Environmental Engineering, the University of Kitakyushu, 1-1 Hibikino, Wakamatsu, Kitakyushu, Fukuoka 808-0135, Japan
* Author to whom correspondence should be addressed.
Received: 19 February 2014 / Revised: 9 April 2014 / Accepted: 11 April 2014 / Published: 23 April 2014
(This article belongs to the Special Issue Metal-Loaded Zeolite Catalysts)
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Abstract

The conversion of syngas (CO + H2) to gasoline-ranged hydrocarbons was carried out using a hybrid catalyst consisting of metal-loaded ZSM-5 coupled with Cu-ZnO in a near-critical n-hexane solvent. Methanol was synthesized from syngas over Cu-ZnO; subsequently, was converted to hydrocarbons through the formation of dimethyl ether (DME) over the metal-loaded ZSM-5. When 0.5 wt% Pd/ZSM-5 and 5 wt% Cu/ZSM-5 among the metal-loaded ZSM-5 catalysts with Pd, Co, Fe or Cu were employed as a portion of the hybrid catalyst, the gasoline-ranged hydrocarbons were selectively produced (the gasoline-ranged hydrocarbons in all hydrocarbons: 59% for the hybrid catalyst with Pd/ZSM-5 and 64% for that with Cu/ZSM-5) with a similar CO conversion during the reaction. An increase in the Cu loading on ZSM-5 resulted in increasing the yield of the gasoline-ranged hydrocarbons, and in decreasing the yield of DME. Furthermore, the hybrid catalyst with Cu/ZSM-5 exhibited no deactivation for 30 h of the reaction. It was revealed that a hybrid catalyst containing Cu/ZSM-5 was efficient in the selective synthesis of gasoline-ranged hydrocarbons from syngas via methanol in the near-critical n-hexane fluid.
Keywords: hybrid catalyst; metal-loaded ZSM-5; syngas; near-critical phase; gasoline; methanol-to-hydrocarbons; copper-zinc oxide; Cu species hybrid catalyst; metal-loaded ZSM-5; syngas; near-critical phase; gasoline; methanol-to-hydrocarbons; copper-zinc oxide; Cu species
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Ma, T.; Imai, H.; Yamawaki, M.; Terasaka, K.; Li, X. Selective Synthesis of Gasoline-Ranged Hydrocarbons from Syngas over Hybrid Catalyst Consisting of Metal-Loaded ZSM-5 Coupled with Copper-Zinc Oxide. Catalysts 2014, 4, 116-128.

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