Remarkable Improvement of Catalytic Performance in Dimethyl Ether to Olefin Reaction over CeO2-modified Calcium-containing MFI Type Zeolite

2008 ◽  
Vol 37 (5) ◽  
pp. 494-495 ◽  
Author(s):  
Akira Iida ◽  
Ryo Nakamura ◽  
Kenichi Komura ◽  
Yoshihiro Sugi
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Performance ◽  
Remarkable Improvement ◽  
Type Zeolite

Catalytic performance of hierarchical H-ZSM-5/MCM-41 for methanol dehydration to dimethyl ether

2013 ◽  
Vol 22 (5) ◽  
pp. 769-777 ◽  
Author(s):  
Yu Sang ◽  
Hongxiao Liu ◽  
Shichao He ◽  
Hansheng Li ◽  
Qingze Jiao ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Performance ◽  
Methanol Dehydration ◽  
Mcm 41

scholarly journals Effects of Synthesis Parameters on Crystallization Behavior of K-MER Zeolite and Its Morphological Properties on Catalytic Cyanoethylation Reaction

Crystals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 64 ◽  
Author(s):  
Ying-Wai Cheong ◽  
Ka-Lun Wong ◽  
Boon Seng Ooi ◽  
Tau Chuan Ling ◽  
Fitri Khoerunnisa ◽  
...  
Keyword(s):  
Crystallization Behavior ◽  
Catalytic Performance ◽  
Morphological Properties ◽  
Crystallization Time ◽  
Microporous Material ◽  
Profound Impact ◽  
Synthesis Parameters ◽  
Type Zeolite ◽  
Catalytic Performances ◽  
Zeolite Crystals

MER-type zeolite is an interesting microporous material that has been widely used in catalysis and separation. By carefully controlling the synthesis parameters, a procedure to synthesize K-MER zeolite crystals with various morphologies has been developed. The silica, water and mineralizer content in the synthesis gel, as well as crystallization time and temperature, have a profound impact on the crystallization kinetics, resulting in zeolite solids with various degrees of crystallinity, crystal sizes and shapes. K-MER zeolite crystals with nanorod, bullet-like, prismatic and wheatsheaf-like morphologies have been successfully obtained. The catalytic performances of the K-MER zeolites in cyanoethylation of methanol, under novel non-microwave instant heating, have been investigated. The zeolite in nanosize form shows the best catalytic performance (94.1% conversion, 100% selectivity) while the bullet-like zeolite gives poorest catalytic performance (44.2% conversion, 100% selectivity).

A brand new zeolite catalyst for carbonylation reaction

2019 ◽  
Vol 55 (8) ◽  
pp. 1048-1051 ◽  
Author(s):  
Xiaobo Feng ◽  
Jie Yao ◽  
Hangjie Li ◽  
Yuan Fang ◽  
Yoshiharu Yoneyama ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Methyl Acetate ◽  
Zeolite Catalyst ◽  
Catalytic Performance ◽  
Carbonylation Reaction

EU-12 zeolite was discovered to posses unreported catalytic performance for carbonylation reaction converting dimethyl ether to methyl acetate.

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.

Dimethyl ether to olefins conversion in a slurry reactor: Effects of the size of particles and the textural and acidic properties of the MFI-type zeolite

2017 ◽  
Vol 57 (7) ◽  
pp. 576-583 ◽  
Author(s):  
N. V. Kolesnichenko ◽  
S. V. Konnov ◽  
V. S. Pavlov ◽  
O. V. Yashina ◽  
N. N. Ezhova ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Slurry Reactor ◽  
Acidic Properties ◽  
Type Zeolite ◽  
Size Of Particles

Preparation of OMS-2/Cordierite Monolithic Catalysts and Their Catalytic Performance for Dimethyl Ether Combustion

2010 ◽  
Vol 31 (8) ◽  
pp. 1019-1024
Author(s):  
Xiuhui NA ◽  
Lin YU ◽  
Ming SUN ◽  
Guiqiang DIAO ◽  
Xiaqing YANG ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Performance ◽  
Monolithic Catalysts

Zinc enhances catalytic performance of pyridine-adsorbed HMOR: Dimethyl ether carbonylation

Fuel ◽  
2022 ◽  
Vol 310 ◽  
pp. 122225
Author(s):  
Hui Bai ◽  
Mengmeng Ma ◽  
Bing Bai ◽  
Lanyun Bai ◽  
Yonghui Bai ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Performance
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