Effects of Feed Composition and Space Velocity on Direct Synthesis of Dimethyl Ether from Syngas

The optimum operating conditions of a single step synthesis of dimethyl ether (DME) from synthesis gas has been determined. The bifunctional catalyst has been prepared by physically mixing of a commercial methanol catalyst (KMT Co.) and a dehydration catalyst (H-MF-90) which has been characterized by XRD, XRF and BET techniques. Catalytic synthesis of dimethyl ether from synthesis gas was evaluated in agitated slurry micro reactor in different ranges of operating conditions which were determined by experimental design according to Taguchi algorithm. The range of operating conditions were chosen as follows: H2/CO mole ratio in feed varying from 0.26 to 1.5, the pressure varying from 10 to 50 bar, the temperature varying from 200 to 240 ºC and weight ratio of methanol catalyst to dehydration catalyst from 0.67 to 4. The experiments have been conducted for different operating conditions at fixed impeller speed equal to 1600rpm and space velocity equal to 500 ml/gcat.h. Considering the results of experiments, optimum conditions for direct synthesis of DME were predicted as follows: T=240 ºC, P=33.3 Bar, H2/CO=1.5 and weight ratio of methanol catalyst to dehydration catalyst equal to 3.

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Effect of Si content on the performance of direct synthesis of dimethyl ether over slurry CuZnAl catalyst prepared by complete liquid phase technology

Journal of Fuel Chemistry and Technology ◽

10.1016/s1872-5813(21)60068-3 ◽

2021 ◽

Vol 49 (6) ◽

pp. 791-798

Author(s):

Kai SUN ◽

Zhong-kai BIAN ◽

Shu-yan CHENG ◽

Gui-ru WANG ◽

Lin ZHANG ◽

...

Keyword(s):

Liquid Phase ◽

Dimethyl Ether ◽

Direct Synthesis ◽

Si Content ◽

Synthesis Of Dimethyl Ether

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Analysis of chemical equilibrium in direct synthesis of dimethyl ether from syngas

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(03)90566-2 ◽

2003 ◽

Vol 44 (2) ◽

pp. 77

Keyword(s):

Dimethyl Ether ◽

Chemical Equilibrium ◽

Direct Synthesis ◽

Synthesis Of Dimethyl Ether

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Direct Synthesis of Dimethyl Ether from Syngas Over Hybrid Catalyst with Hierarchical ZSM-5 as the Methanol Dehydration Catalyst

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.16976 ◽

2020 ◽

Vol 20 (2) ◽

pp. 1245-1252

Author(s):

Mengdie Cai ◽

Dong Xiang ◽

Qin Cheng

Keyword(s):

Dimethyl Ether ◽

Direct Synthesis ◽

Methanol Dehydration ◽

Hybrid Catalyst ◽

Synthesis Of Dimethyl Ether

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Temperature-programmed surface reactions of methanol and dimethyl ether on bifunctional catalysts for the direct synthesis of dimethyl ether from syngas

MATEC Web of Conferences ◽

10.1051/matecconf/201824300002 ◽

2018 ◽

Vol 243 ◽

pp. 00002

Author(s):

Olga Vodorezova ◽

Pavel Musich ◽

Natalia Karakchieva ◽

Lothar Heinrich ◽

Irina Kurzina

Keyword(s):

Dimethyl Ether ◽

Direct Synthesis ◽

Bifunctional Catalyst ◽

Bifunctional Catalysts ◽

X Ray Diffraction ◽

X Ray ◽

Physical Mixing ◽

Stage Synthesis ◽

Temperature Programmed ◽

Synthesis Of Dimethyl Ether

Dimethyl ether (DME) can be used as a replacement for diesel fuel in transportation. The catalytic effectiveness of bifunctional catalysts for DME one-stage synthesis from carbon monoxide and hydrogen was estimated in the paper. Bifunctional catalysts CuZnAl/HZSM-5, CuZnAlCr/HZSM-5, and CuZnAlZr/HZSM-5 were obtained by physical mixing of CuZnAl(Cr/Zr)– Ох and HZSM-5 components and were characterized by BET, X-ray diffraction, and temperatureprogrammed surface reaction methods. Based on the TPSR results, the mechanism of the interaction of methanol and DME with the surface of the bifunctional catalyst was studied. It was found that the temperature range of the greatest catalytic activity was 240–260 °С.

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