Enhancement of dimethylether yield by reverse shift reaction in the direct dimethylether synthesis

Kwang Deog Jung, Sung Hoon Chung, Palgunadi Jelliako, Oh Shim Joo, Young Kwon Park

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The reverse shift reaction was used to mitigate CO2 and to adjust H2/CO. The key concept is to convert CO2 to CO using excess hydrogen from a reformer and CO2 from a DME reactor. Membrane process was selected for separating hydrogen from the reformer stream, where H2/CO ratio can be adjusted to be 1∼2 for DME synthesis. The separated hydrogen was combined with CO2 from the DME synthesis reactor, which is introduced into a reverse shift reactor to convert CO2 into CO. The simulation result showed DME yield of above 97% based on feed carbon and could mitigate CO2. The reverse water shift reaction temperature should be above 600°C to achieve 60% conversion of CO2. The commercial shift reaction catalysts such as Cu/Zn/Al or Fe/Cr catalysts at the temperature above 600°C were rapidly deactivated at the high temperature in CO2-H2 stream. However, ZnO based catalyst showed the high activity and stability. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

Original languageEnglish
Title of host publication2006 AIChE Annual Meeting
StatePublished - 2006
Event2006 AIChE Annual Meeting - San Francisco, CA, United States
Duration: 12 Nov 200617 Nov 2006

Publication series

NameAIChE Annual Meeting, Conference Proceedings


Conference2006 AIChE Annual Meeting
Country/TerritoryUnited States
CitySan Francisco, CA


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