Catalytic Dehydration of Methanol to Dimethyl Ether Catalyzed by Aluminum Phosphate Catalysts

被引：56

作者：

Yaripour, F. ^{[1
]}

Mollavali, A. ^{[2
]}

Jam, Sh. Mohammadi ^{[1
]}

Atashi, H. ^{[2
]}

机构：

[1] Natl Petrochem Co, Catalyst Res Grp, Petrochem Res & Technol Co, Tehran 14358, Iran

[2] Univ Sistan & Baluchestan, Dept Chem Engn, Fac Engn, Zahedan, Iran

来源：

ENERGY & FUELS | 2009年 / 23卷 / 3-4期

关键词：

SOLID-ACID; SYNTHESIS GAS; DME; CU/ZNO/AL2O3;

D O I：

10.1021/ef800856c

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A series of solid-acid catalysts with different content of components was prepared using the coprecipitation method. These samples comprised modified gamma-Al2O3 with phosphorus. The effects of various contents of phosphorus (Al/P ratio from 0.5 to 3) have been investigated to determine an optimum one. The samples were characterized using BET, TGA, XRD, and NH3-TPD techniques and were also tested in a fixed-bed flow reactor under the same operating conditions (T = 573 K, P = 16 barg, WHSV = 26.07 h(-1)). According to the experimental results, phosphorus-modified catalysts have shown better performance compared to pure gamma-alumina. It was found that surface areas increase with an increase in the molar ratio of aluminum-to-phosphorus. It was observed that aluminum phosphate samples with acidic sites whose acidity is very weak and/or moderate exhibit the best catalytic performance and stability. The sample with molar ratio of Al/P = 1.5 have exhibited the best activity for methanol dehydration.

引用

页码：1896 / 1900

页数：5

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