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...

Deactivation kinetics of γ-Al2O3 catalyst in methanol dehydration to dimethyl ether

Fuel ◽  
2021 ◽  
pp. 122443
Author(s):  
Saeed Sahebdelfar ◽  
Parisa Moghimpour Bijani ◽  
Fereydoon Yaripour
Keyword(s):  
Dimethyl Ether ◽  
Methanol Dehydration ◽  
Deactivation Kinetics ◽  
Kinetics Of ◽  
Al2o3 Catalyst

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

Study of nickel-molybdenum catalysts for methanation of carbon monoxide

1980 ◽  
Vol 45 (3) ◽  
pp. 783-790 ◽  
Author(s):  
Petr Taras ◽  
Milan Pospíšil
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Mixed Oxides ◽  
Minor Component ◽  
Fast Neutrons ◽  
Scanning Calorimetry ◽  
Low Concentrations ◽  
Γ Rays ◽  
Molybdenum Catalysts ◽  
Kinetics Of

Catalytic activity of nickel-molybdenum catalysts for methanation of carbon monoxide and hydrogen was studied by means of differential scanning calorimetry. The activity of NiMoOx systems exceeds that of carrier-free nickel if x < 2, and is conditioned by the oxidation degree of molybdenum, changing in dependence on the composition in the region Mo-MoO2. The activity of the catalysts is adversely affected by irradiation by fast neutrons, dose 28.1 Gy, or by γ rays using doses in the region 0.8-52 kGy. The system is most susceptible to irradiation in the region of low concentrations of the minor component (about 1 mol.%). The dependence of changes in catalytic activity of γ-irradiated samples on the dose exhibits a maximum in the range of 2-5 kGy. The changes in catalytic activity are stimulated by the change of reactivity of the starting mixed oxides, leading to different kinetics of their reduction and modification of their adsorption properties. The irradiation of the catalysts results in lowered concentration of the active centres for the methanation reaction.

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