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Title: New clean fuel from coal -- Direct dimethyl ether synthesis from hydrogen and carbon monoxide

Abstract

Dimethyl ether (DME), which has similar physical properties to propane and is easily liquefied at low pressure, has a significant possibility as a clean and non-toxic fuel from coal or coal bed methane. Equilibrium calculation also shows a big advantage of high carbon monoxide conversion of DME synthesis compared to methanol synthesis. By using a 50 kg/day DME bench scale test plant, direct synthesis of DME from hydrogen and carbon monoxide has been studied with newly developed catalysts which are very fine particles. This test plant features a high pressure three-phase slurry reactor and low temperature DME separator. DME is synthesized at temperatures around 533--553 K and at pressures around 3--5 MPa. According to the reaction stoichiometry, the same amount of hydrogen and carbon monoxide react to DME and carbon dioxide. Carbon conversion to DME is one third and the rest of carbon is converted to carbon dioxide. As a result of the experiments, make-up CO conversion is 35--50% on an once-through basis, which is extremely high compared to that of methanol synthesis from hydrogen and carbon monoxide. DME selectivity is around 60 c-mol %. Most of the by-product is CO{sub 2} with a small amount of methanol and water.more » No heavy by-products have been recognized. Effluent from the reactor is finally cooled to 233--253 K in a DME separator and liquid DME is recovered as a product.« less

Authors:
; ; ; ; ;  [1];  [2]
  1. NKK Corp., Tokyo (Japan)
  2. Univ. of Tokyo (Japan)
Publication Date:
OSTI Identifier:
324772
Report Number(s):
CONF-970931-
TRN: IM9911%%469
Resource Type:
Conference
Resource Relation:
Conference: 14. annual international Pittsburgh coal conference and workshop: clean coal technology and coal utilization, Taiyuan (China), 23-27 Sep 1997; Other Information: PBD: 1997; Related Information: Is Part Of Fourteenth annual international Pittsburgh coal conference and workshop: Proceedings; PB: [1500] p.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 10 SYNTHETIC FUELS; HYDROGEN; CARBON MONOXIDE; METHANATION; ETHERS; SYNTHESIS; CHEMICAL REACTION YIELD; CARBON DIOXIDE; RECYCLING

Citation Formats

Ogawa, T, Ono, M, Mizuguchi, M, Tomura, K, Shikada, T, Ohono, Y, and Fujimoto, K. New clean fuel from coal -- Direct dimethyl ether synthesis from hydrogen and carbon monoxide. United States: N. p., 1997. Web.
Ogawa, T, Ono, M, Mizuguchi, M, Tomura, K, Shikada, T, Ohono, Y, & Fujimoto, K. New clean fuel from coal -- Direct dimethyl ether synthesis from hydrogen and carbon monoxide. United States.
Ogawa, T, Ono, M, Mizuguchi, M, Tomura, K, Shikada, T, Ohono, Y, and Fujimoto, K. 1997. "New clean fuel from coal -- Direct dimethyl ether synthesis from hydrogen and carbon monoxide". United States.
@article{osti_324772,
title = {New clean fuel from coal -- Direct dimethyl ether synthesis from hydrogen and carbon monoxide},
author = {Ogawa, T and Ono, M and Mizuguchi, M and Tomura, K and Shikada, T and Ohono, Y and Fujimoto, K},
abstractNote = {Dimethyl ether (DME), which has similar physical properties to propane and is easily liquefied at low pressure, has a significant possibility as a clean and non-toxic fuel from coal or coal bed methane. Equilibrium calculation also shows a big advantage of high carbon monoxide conversion of DME synthesis compared to methanol synthesis. By using a 50 kg/day DME bench scale test plant, direct synthesis of DME from hydrogen and carbon monoxide has been studied with newly developed catalysts which are very fine particles. This test plant features a high pressure three-phase slurry reactor and low temperature DME separator. DME is synthesized at temperatures around 533--553 K and at pressures around 3--5 MPa. According to the reaction stoichiometry, the same amount of hydrogen and carbon monoxide react to DME and carbon dioxide. Carbon conversion to DME is one third and the rest of carbon is converted to carbon dioxide. As a result of the experiments, make-up CO conversion is 35--50% on an once-through basis, which is extremely high compared to that of methanol synthesis from hydrogen and carbon monoxide. DME selectivity is around 60 c-mol %. Most of the by-product is CO{sub 2} with a small amount of methanol and water. No heavy by-products have been recognized. Effluent from the reactor is finally cooled to 233--253 K in a DME separator and liquid DME is recovered as a product.},
doi = {},
url = {https://www.osti.gov/biblio/324772}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Dec 31 00:00:00 EST 1997},
month = {Wed Dec 31 00:00:00 EST 1997}
}

Conference:
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