Print: | ISSN 0256-1115 |
Online: | ISSN 1975-7220 |
Korean Journal of Chemical Engineering,
Vol.24, No.2, 350-353, 2007 Synthesis of dimethyl ether from syngas obtained by coal gasification
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.
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