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

Publication history: Received August 30, 2006
Accepted October 21, 2006

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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Synthesis of dimethyl ether from syngas obtained by coal gasification

Young Don Yoo^† Seung Jong Lee Yongseung Yun

Institute for Advanced Engineering, 633-3, Goan-ri, Baegam-myeon, Yongin-si, Gyeonggi-do 449-863, Korea

Korean Journal of Chemical Engineering, March 2007, 24(2), 350-353(4), 10.1007/s11814-007-5045-9

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Abstract

The characteristics of a tubular fixed-bed reactor for the direct synthesis of dimethyl ether (DME) from syngas obtained by coal gasification have been developed. DME synthesis test was conducted with a hybrid DME synthesis catalyst (CuO/ZnO/Al2O3 for methanol forming, γ-alumina for methanol dehydration) to understand the performance under the conditions of 6.0MPa, 260 ℃ and GHSV=3,000 l/kg-cat·h. The H2 conversion and CO conversion were 85-92%, 37-45%, respectively. About 68-80% of DME selectivity was observed. DME synthesis reactor also operated at the productivity of 4.6-4.9 mol/kg-cat·h, which is slightly higher than that in the Peng’s prediction results in case of H2 : CO=0.5.

Keywords

Coal Gasification Syngas Dimethyl Ether Tubular Fixed-bed Reactor

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