Dehydration of methanol to dimethyl ether over nanocrystalline Al2O3 with mixed γ- and χ-crystalline phases

被引：68
作者：
Khom-in, Jutharat [1 ]
Praserthdam, Piyasan [1 ]
Panpranot, Joongjai [1 ]
Mekasuwandumrong, Okorn [2 ]
机构：
[1] Chulalongkorn Univ, Fac Engn, Dept Chem Engn, Ctr Excellence Catalysis & Catalyt React Engn, Bangkok 10330, Thailand
[2] Silpakorn Univ, Fac Engn & Ind Technol, Dept Chem Engn, Nakhon Pathom 73000, Thailand
来源：
CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 10期
关键词：
methanol dehydration; dimethyl ether (DME); gamma-A1203; chi-Al203; mixed phases;
D O I：
10.1016/j.catcom.2008.03.009
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Dehydration of methanol to dimethyl ether (DME) was investigated over a wide range of narrocrystalline Al2O3 with mixed gamma- and chi-crystalline phases. The catalysts were characterized by X-ray diffraction (XRD), N-2 physisorption, ion-exchange titration, and NH3-tempearture programmed desorption (NH3-TPD). It was found that gamma-Al2O3 catalyst containing 20 wt% of chi-phase exhibited the highest yield (86%) with good stability for DIME synthesis. The NH3-TPD and ion-exchange titration results revealed that the existence of 20 wt% chi-phase in gamma-Al2O3 increased significantly both the density and the strength of surface acidity of alumina. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1955 / 1958
页数：4
相关论文
共 17 条
[1]   INFLUENCE OF PREPARATION CONDITIONS ON THE STRUCTURE AND CATALYTIC PROPERTIES OF SO42-/ZRO2 SUPERACID CATALYSTS [J].
CORMA, A ;
FORNES, V ;
JUANRAJADELL, MI ;
NIETO, JML .
APPLIED CATALYSIS A-GENERAL, 1994, 116 (1-2) :151-163
[2]   Boria modified alumina probed by methanol dehydration and IR spectroscopy [J].
de Farias, AMD ;
Esteves, AML ;
Ziarelli, F ;
Caldarelli, S ;
Fraga, MA ;
Appel, LG .
APPLIED SURFACE SCIENCE, 2004, 227 (1-4) :132-138
[3]   Synthesis of dimethyl ether (DME) on modified HY zeolite and modified HY zeolite-supported Cu-Mn-Zn catalysts [J].
Fei, Jinhua ;
Hou, Zhaoyin ;
Zhu, Bing ;
Lou, Hui ;
Zheng, Xiaoming .
APPLIED CATALYSIS A-GENERAL, 2006, 304 (01) :49-54
[4]   Surface acidity and the dehydration of methanol to dimethyl ether [J].
Fu, YC ;
Hong, T ;
Chen, JP ;
Auroux, A ;
Shen, JY .
THERMOCHIMICA ACTA, 2005, 434 (1-2) :22-26
[5]  
Jiang S, 2004, B KOREAN CHEM SOC, V25, P185
[6]  
Jun KW, 2002, B KOR CHEM SOC, V23, P803
[7]   Effect of γ-alumina content on catalytic performance of modified ZSM-5 for dehydration of crude methanol to dimethyl ether [J].
Kim, Shin Dong ;
Baek, Seung Chan ;
Lee, Yun-Jo ;
Jun, Ki-Won ;
Kim, Myung Jun ;
Yoo, Ik Sang .
APPLIED CATALYSIS A-GENERAL, 2006, 309 (01) :139-143
[8]   Esterification and transesterification on tungstated zirconia:: Effect of calcination temperature [J].
Lopez, Dora E. ;
Suwannakarn, Kaewta ;
Bruce, David A. ;
Goodwin, James G., Jr. .
JOURNAL OF CATALYSIS, 2007, 247 (01) :43-50
[9]  
Meephoka C., 2008, CATAL COMMUN, V9, P546, DOI DOI 10.1016/J.CATC0M.2007.04.016
[10]   Synthesis of thermally stable micro spherical χ-alumina by thermal decomposition of aluminum isopropoxide in mineral oil [J].
Mekasuwandumrong, O ;
Silveston, PL ;
Praserthdam, P ;
Inoue, M ;
Pavarajarn, V ;
Tanakulrungsank, W .
INORGANIC CHEMISTRY COMMUNICATIONS, 2003, 6 (07) :930-934
12