Methanol dehydration to dimethyl ether over strong-acid-modified diatomite catalysts

被引：8

作者：

Pranee, Watcharakorn ^{[1
]}

Neramittagapong, Sutasinee ^{[1
]}

Assawasaengrat, Pornsawan ^{[2
]}

Neramittagapong, Arthit ^{[1
]}

机构：

[1] Khon Kaen Univ, Dept Chem Engn, Fac Engn, 123 Moo 16 Mittapap Rd, Khon Kaen 40002, Thailand

[2] King Mongkuts Inst Technol Ladkrabang, Dept Chem Engn, Fac Engn, Bangkok, Thailand

来源：

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS | 2016年 / 38卷 / 21期

关键词：

Acid catalyst; alternative energy; dimethyl ether; diatomite; methanol; ZEOLITES;

D O I：

10.1080/15567036.2015.1132285

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：

Dimethyl ether synthesis via methanol dehydration over strong-acid-modified (with sulfuric, hydrochloric and nitric acid) diatomite (DM) catalysts was conducted in a fixed-bed reactor with elevated temperature reaction from 250 to 350 degrees C. The modified DM catalysts were characterized by using X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, fourier transform Raman spectroscopy, temperature-programmed desorption of ammonia, temperature-programmed of carbon dioxide, thermal gravimetric analysis, and solid-state 27Aluminum magic angle spinning/nuclear magnetic resonance spectroscopy. It was found that sulfuric-acid-modified DM catalyst yielded the highest DME selectivity (similar to 99%). It was also revealed that methanol conversion depended on Al ions. The methanol conversion increased with Al-(IV) but decreased with Al-(V) and Al-(VI).

引用

页码：3109 / 3115

页数：7

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