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

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).

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Preparation and catalytic performance of FAU-type zeolite films supported on FeCrAl grids

Journal of Fuel Chemistry and Technology ◽

10.1016/s1872-5813(12)60022-x ◽

2012 ◽

Vol 40 (5) ◽

pp. 558-563 ◽

Cited By ~ 1

Author(s):

Hao YUAN ◽

Gang LI

Keyword(s):

Catalytic Performance ◽

Type Zeolite ◽

Zeolite Films

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A brand new zeolite catalyst for carbonylation reaction

Chemical Communications ◽

10.1039/c8cc08411d ◽

2019 ◽

Vol 55 (8) ◽

pp. 1048-1051 ◽

Cited By ~ 13

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.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.66-68.1404 ◽

2011 ◽

Vol 66-68 ◽

pp. 1404-1409 ◽

Cited By ~ 4

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.

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