Facile Structure Tuning of a Methanol-Synthesis Catalyst towards the Direct Synthesis of Dimethyl Ether from Syngas

ChemCatChem ◽  
2017 ◽  
Vol 9 (24) ◽  
pp. 4484-4489 ◽  
Author(s):  
Cheonwoo Jeong ◽  
Hyungwon Ham ◽  
Jong Wook Bae ◽  
Dong-Chang Kang ◽  
Chae-Ho Shin ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Methanol Synthesis ◽  
Direct Synthesis ◽  
Methanol Synthesis Catalyst ◽  
Synthesis Of Dimethyl Ether

scholarly journals Synthesis of dimethyl ether using a fixed bed of dual catalyst for methanol synthesis and its dehydration

2019 ◽  
Vol 268 ◽  
pp. 07003
Author(s):  
Aisyah Ardy ◽  
Jenny Rizkiana ◽  
Melia Laniwati ◽  
Herri Susanto
Keyword(s):  
Dimethyl Ether ◽  
Methanol Synthesis ◽  
Gas Flow ◽  
Direct Synthesis ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
High Concentration ◽  
Catalyst Composition ◽  
Methanol Synthesis Catalyst ◽  
Methanol Formation

Experimental study on direct synthesis of DME (dimethyl ether) has been conducted using tubular reactor. The synthesis of DME was performed with two commercial catalysts, ie methanol synthesis catalyst (M151, Cu-based) and methanol dehydration catalyst (γAl2O3). A mixture of H2, CO, and N2 was used as a model for synthesis gas. Gas flow rate was set at 20 mL/min (5 bar and 240oC). The reaction held at: pressure of 5 bar and a temperature of 240°C. This experiment was conducted by arranging a series of two types of catalysts in a fixed bed reactor. The methanol synthesis catalyst was placed in the upstream to ensure the reaction of methanol formation, then proceed with dehydration of methanol to DME. The objective of this experiment was to find out the best dual catalyst composition to produce a high concentration of DME. The experiment has shown that the best combination of methanol catalyst to dehydration catalyst was a mixture of 20% methanol catalyst (ratio 1/4). CO conversion was 62% and the product ratio of DME/methanol was 40%.

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

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

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

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.

Structured catalysts for the direct synthesis of dimethyl ether from synthesis gas: A comparison of core@shell versus hybrid catalyst configuration

2020 ◽  
Vol 342 ◽  
pp. 46-58 ◽  
Author(s):  
Giulia Baracchini ◽  
Albert G.F. Machoke ◽  
Michael Klumpp ◽  
Ruoxi Wen ◽  
Patrick Arnold ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Synthesis Gas ◽  
Direct Synthesis ◽  
Core Shell ◽  
Hybrid Catalyst ◽  
Structured Catalysts ◽  
Synthesis Of Dimethyl Ether

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

2008 ◽  
Vol 47 (20) ◽  
pp. 7672-7679 ◽  
Author(s):  
Gholamreza Moradi ◽  
Javad Ahmadpour ◽  
Mahdi Nazari ◽  
Ferydon Yaripour
Keyword(s):  
Dimethyl Ether ◽  
Direct Synthesis ◽  
Space Velocity ◽  
Feed Composition ◽  
Synthesis Of Dimethyl Ether

scholarly journals Direct synthesis of dimethyl ether in multi-tubular fixed-bed reactors: 2D multi-scale modelling and optimum design

2018 ◽  
Vol 174 ◽  
pp. 149-157 ◽  
Author(s):  
Raquel Peláez ◽  
Pablo Marín ◽  
Fernando V. Díez ◽  
Salvador Ordóñez
Keyword(s):  
Dimethyl Ether ◽  
Optimum Design ◽  
Direct Synthesis ◽  
Fixed Bed ◽  
Multi Scale ◽  
Fixed Bed Reactors ◽  
Scale Modelling ◽  
Synthesis Of Dimethyl Ether

Regeneration of CuO-ZnO-Al2O3/γ-Al2O3 catalyst in the direct synthesis of dimethyl ether

2010 ◽  
Vol 94 (1-2) ◽  
pp. 108-116 ◽  
Author(s):  
Irene Sierra ◽  
Javier Ereña ◽  
Andrés T. Aguayo ◽  
José M. Arandes ◽  
Javier Bilbao
Keyword(s):  
Dimethyl Ether ◽  
Direct Synthesis ◽  
Al2o3 Catalyst ◽  
Synthesis Of Dimethyl Ether
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