Direct Synthesis of Dimethyl Ether form Synthesis Gas

The results of the development of combined process for production of dimethyl ether (CuO/ZnO/Al2O3) and methanol dehydration (γ-Al2O3, zeolite (ZSM-5 type) with a silicate modulus (М) 20, 30, 60, 80, 100, and 200) are presented. The experiments on the influence of the catalysts loading and catalytic conditions were carried out (Р=3 MPa, Н2/СО=2, Т=553 К). It was established that the use of ZSM-5 zeolite catalysts with silicate modulus of 30 allows obtaining the yield of dimethyl ether up to 39%. It was stated that catalytic systems were stable during 180 h.

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98/01151 Preparation method of catalysts and reaction conditions for direct synthesis of dimethyl ether from synthesis gas

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(98)97293-9 ◽

1998 ◽

Vol 39 (2) ◽

pp. 103

Keyword(s):

Dimethyl Ether ◽

Synthesis Gas ◽

Preparation Method ◽

Direct Synthesis ◽

Reaction Conditions ◽

Synthesis Of Dimethyl Ether

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Determination of the Optimum Operating Conditions for Direct Synthesis of Dimethyl Ether from Syngas

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1367 ◽

2007 ◽

Vol 5 (1) ◽

Cited By ~ 16

Author(s):

Gholam Reza Moradi ◽

Rohollah Ghanei ◽

Fereydoon Yaripour

Keyword(s):

Dimethyl Ether ◽

Synthesis Gas ◽

Direct Synthesis ◽

Weight Ratio ◽

Space Velocity ◽

Bifunctional Catalyst ◽

Single Step ◽

Operating Conditions ◽

Optimum Operating ◽

Synthesis Of Dimethyl Ether

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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The Catalysts Synthesis Methanol for Direct Synthesis of Dimethyl Ether from Synthesis Gas

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1085.29 ◽

2015 ◽

Vol 1085 ◽

pp. 29-33

Author(s):

Natalia I. Kosova ◽

Olga Yu. Vodorezova ◽

Irina A. Kurzina ◽

Larisa N. Kurina ◽

Veronica M. Vorobeva ◽

...

Keyword(s):

Catalytic Activity ◽

Dimethyl Ether ◽

Synthesis Gas ◽

Direct Synthesis ◽

Methanol Dehydration ◽

Zirconium Oxides ◽

Synthesis Of Dimethyl Ether

Cuprum-zinc catalysts with chrome and zirconium additives were obtained by continuous codeposition within this study. XRD showed the presence of cuprum, zinc, chrome, and zirconium oxides phases. Catalytic activity was studied under the mixed loading with HZSM-5 zeolite as a catalyst for methanol dehydration during the STD-process reaction. TPR method was used to show that the reduction of catalysts takes place up to 350 °С. The maximum СО conversion value for sample CuZnAl amounts to 60 %, for sample CuZnAlСr - 83 %, and for sample CuZnAlZr it is 68 %. DME yield amounted to 18 % at a temperature of 240 °С for sample CuZnAl, for CuZnAlZr – 15 % (Т=240 °С), and for CuZnAl – 11 % at 220 °С.

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