Characterization of Cu−Mn/Zeolite-Y Catalyst for One-Step Synthesis of Dimethyl Ether from CO−H2

2008 ◽  
Vol 22 (5) ◽  
pp. 2877-2884 ◽  
Author(s):  
Xiu-Juan Tang ◽  
Jin-Hua Fei ◽  
Zhao-Yin Hou ◽  
Xiao-Ming Zheng ◽  
Hui Lou
Keyword(s):  
Dimethyl Ether ◽  
Zeolite Y ◽  
One Step ◽  
Synthesis Of Dimethyl Ether

One-step synthesis of dimethyl ether from syngas on ordered mesoporous copper incorporated alumina

2016 ◽  
Vol 25 (5) ◽  
pp. 775-781 ◽  
Author(s):  
Yan Wang ◽  
Yuexian Chen ◽  
Feng Yu ◽  
Dahai Pan ◽  
Binbin Fan ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Ordered Mesoporous ◽  
One Step ◽  
Synthesis Of Dimethyl Ether

Catalysis for One-step Synthesis of Dimethyl Ether from Hydrogenation of CO

2010 ◽  
Vol 19 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Xiao-Ming Zheng ◽  
Jin-Hua Fei ◽  
Zhao-Yin Hou
Keyword(s):  
Dimethyl Ether ◽  
One Step ◽  
Synthesis Of Dimethyl Ether ◽  
Hydrogenation Of Co

A double-shell capsule catalyst with core–shell-like structure for one-step exactly controlled synthesis of dimethyl ether from CO2 containing syngas

2011 ◽  
Vol 171 (1) ◽  
pp. 229-235 ◽  
Author(s):  
Guohui Yang ◽  
Montree Thongkam ◽  
Tharapong Vitidsant ◽  
Yoshiharu Yoneyama ◽  
Yisheng Tan ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Core Shell ◽  
Controlled Synthesis ◽  
One Step ◽  
Synthesis Of Dimethyl Ether

Study on Preparation and Catalytic Properties of Pd/γ-Al2O3 Catalysts in One-Step Synthesis of Dimethyl Ether

2011 ◽  
Vol 66-68 ◽  
pp. 1404-1409 ◽  
Author(s):  
Rui Zhi Chu ◽  
Zhong Cai Zhang ◽  
Ya Fei Liu ◽  
Xian Liang Meng ◽  
Zhi Min Zong ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Performance ◽  
Acid Sites ◽  
Co Conversion ◽  
Dimethyl Ether Synthesis ◽  
Acidic Sites ◽  
One Step ◽  
Space Time Yield ◽  
Ether Synthesis ◽  
Synthesis Of Dimethyl Ether

A series of Pd/γ-Al2O3 catalysts with different additons of Pd were prepared by impregnation. The effect of calcination condition and Pd loading on catalytic performance of catalysts for one-step dimethyl ether synthesis has been investigated. The physic-chemical performance and structure of Pd/γ-Al2O3 catalysts were characterized by CO-TPD, TGA and nitrogen physisorption. The results show that the dispersion of Pd and the amount of adsorbration on the CO-bridge of Pd could be increased to by the moderate microwave heating on the catalysts, and the catalyst performance can be improved. But a large number of surface acidic sites of Pd/γ-Al2O3 are covered by highly fragmented Pd-grain, it causes DME selectivity reduced. And the excessive Pd can reduce the samples’ surface acid, decrease the dispersion of the metal Pd and block up the pore of γ-Al2O3. The CO conversion rate and DME space-time yield could reach 60.1% and 28.76 mmol·g-1·h-1 respectively at 2% Pd loading, at this time Pd/γ-Al2O3 has a high Pd activity surface and ideal acid sites.

In-situ regeneration mechanisms of hybrid catalysts in the one-step synthesis of dimethyl ether from syngas

2007 ◽  
Vol 115 (1-2) ◽  
pp. 23-26 ◽  
Author(s):  
Youshun Luan ◽  
Hengyong Xu ◽  
Chunying Yu ◽  
Wenzhao Li ◽  
Shoufu Hou
Keyword(s):  
Dimethyl Ether ◽  
Hybrid Catalysts ◽  
In Situ Regeneration ◽  
One Step ◽  
The One ◽  
Synthesis Of Dimethyl Ether

Effect of CeO2 Loading on the Performance of Pd/γ-Al2O3 Catalysts for one-Step Synthesis of Dimethyl Ether

2011 ◽  
Vol 66-68 ◽  
pp. 1193-1198 ◽  
Author(s):  
Xian Liang Meng ◽  
Ya Fei Liu ◽  
Zhong Cai Zhang ◽  
Rui Zhi Chu ◽  
Zhi Min Zong ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Total Pore Volume ◽  
Catalytic Performance ◽  
Pd Dispersion ◽  
Dimethyl Ether Synthesis ◽  
Catalytic Stability ◽  
One Step ◽  
Space Time Yield ◽  
Ether Synthesis ◽  
Synthesis Of Dimethyl Ether

A series of Pd-CeO2/γ-Al2O3 catalysts which have a different CeO2 loading were prepared by impregnation under microwave irradiation. Based on various characterizations, such as XRD, H2-TPR and CO-TPD, the effect of CeO2 loading on catalytic performance and stability of Pd/γ-Al2O3 were examined for one-step dimethyl ether synthesis from syngas. The results show that there are two completely opposite effect on the CO conversation rate of Pd/γ-Al2O3 catalysts after adding CeO2, namely that it can improve Pd dispersion at a suitable loading, hence the CO conversation rate will increase too. However, the surface area and total pore volume of Pd/γ-Al2O3 catalysts decrease by adding excessive CeO2 and CO conversation rate will also reduce. When the CeO2 loading achieve to 2%, catalysts can have relatively high catalytic stability and activity that the CO conversation rate and DME space-time yield can reach 64.7% and 27.82 mmol·ml-1·h-1, respectively.

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