Synthesis of AlOOH slurry catalyst and catalytic activity for methanol dehydration to dimethyl ether

2012 ◽  
Vol 18 (1) ◽  
pp. 123-127 ◽  
Author(s):  
Lei Liu ◽  
Wei Huang ◽  
Zhi-hua Gao ◽  
Li-hua Yin
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Dehydration

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

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.

scholarly journals The catalytic activity of Co/kaolinite catalyst for dimethyl ether synthesis via methanol dehydration

2020 ◽  
Vol 6 ◽  
pp. 469-473
Author(s):  
Imran Rosadi ◽  
Pakpoom Athikaphan ◽  
Phatchareephon Chantanachat ◽  
Arthit Neramittagapong ◽  
Sutasinee Neramittagapong
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Dehydration ◽  
Dimethyl Ether Synthesis ◽  
Ether Synthesis

Effect of H-ZSM-5 zeolite content on the intrinsic kinetics of the methanol dehydration to dimethyl ether over H-ZSM-5/Al2O3 molded catalyst

2022 ◽  
Author(s):  
Alexey Zhokh ◽  
Andrii Trypolskyi ◽  
Valentina Gritsenko ◽  
Peter E. Strizhak
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Dehydration ◽  
Intrinsic Kinetics ◽  
Zeolite Content ◽  
Kinetics Of

A series of H-ZSM-5/Al2O3 molded catalysts with various zeolite/alumina ratios has been prepared and their catalytic activity in the methanol dehydration to dimethyl ether has been studied. Based on Langmuir-Hinshelwood...

Synthesis and Characterization of Different γ-Al2O3 Nanocatalysts for Methanol Dehydration to Dimethyl Ether

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Seyyed Ya'ghoob Hosseini ◽  
Mohammad Reza Khosravi Nikou
Keyword(s):  
Dimethyl Ether ◽  
Solid Acid Catalyst ◽  
Fixed Bed ◽  
Operating Parameter ◽  
Textural Properties ◽  
Ammonia Solution ◽  
Precipitation Method ◽  
High Yield ◽  
Methanol Dehydration ◽  
Adsorption Desorption

Abstract A simple co-precipitation method was utilized to synthesize γ-Al2O3 catalysts using aluminum nitrate nonahydrate as the source of aluminum cations for methanol dehydration to dimethyl ether (DME). Different precipitating agents comprising ammonium carbonate, ammonium bicarbonate and ammonia solutions were used for preparation of the samples. The catalysts were characterized by XRD, FTIR, SEM, NH3-TPD and N2 adsorption-desorption techniques. The sample prepared by ammonia solution had the highest acidity among the synthesized catalysts. Also, N2 adsorption-desorption results showed suitable textural properties for all of the synthesized samples. Vapor phase dehydration of methanol to DME was performed in the fixed bed micro reactor over the synthesized catalysts and commercial one for comparison purposes. The effects of different characteristics of catalysts such as surface area, acidity, sintering factor and temperature as an operating parameter on performance of catalysts were investigated. The catalyst prepared by ammonia solution showed best catalytic activity due to the suitable textural properties and high amount of acidic sites. Also, the results showed that only high acid strength can’t result high yield of DME for a solid acid catalyst.

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