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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 31, 2008
Accepted November 17, 2008

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Carbon dispersed iron-manganese catalyst for light olefin synthesis from CO hydrogenation

Jianli Zhang^{1 2} Kegong Fang¹ Kan Zhang¹ Wenhuai Li¹ Yuhan Sun^1†

¹State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, P. R. China ²Graduate University of the Chinese Academy of Sciences, Beijing 100039, China

Korean Journal of Chemical Engineering, May 2009, 26(3), 890-894(5), 10.1007/s11814-009-0149-z

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Abstract

Abstract.High performance iron-manganese catalysts dispersed with carbon to produce light olefins from CO hydrogenation were prepared by sol-gel method using citric acid as precursor. The effects of carbon content on the bulk structure, the water gas shift reaction, the chain propagation ability and the activity and selectivity of the catalysts were investigated. The results showed that the catalysts were gradually reduced during the decomposition of the precursor_x000D_ when calcined under pure N2. The formation of iron-manganese mixed crystallites was favored and stabilized because of the enhanced interaction of iron and manganese with increasing carbon content. During the subsequent CO hydrogenation reaction, all the catalysts showed high activity and olefin selectivity. With increasing carbon content, the water gas shift (WGS) reaction was restrained and the chain propagation ability was inhibited. Catalysts with higher carbon content showed much lighter hydrocarbon products; however, the selectivity of CH4 was almost unchanged.

Keywords

CO Hydrogenation Fe-Mn Catalyst Light Olefin Selectivity Chain Propagation Ability

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