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).
机构:
Korea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South KoreaKorea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South Korea
Jun, KW
Lee, HS
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机构:
Korea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South KoreaKorea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South Korea
Lee, HS
Roh, HS
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机构:
Korea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South KoreaKorea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South Korea
Roh, HS
Park, SE
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Korea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South KoreaKorea Res Inst Chem Technol, Catalysis Ctr Mol Engn, Taejon 305600, South Korea