| Synthesis of nanocrystalline γ-Al_2O_3 by sol-gel and precipitation methods for methanol dehydration to dimethyl ether |
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| 作者姓名： | Zahra Hosseini Majid Taghizadeh Fereydoon Yaripour |
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| 作者单位： | Zahra Hosseini,Majid Taghizadeh(Chemical Engineering Department,Babol University of Technology,P.O.Box 484,4714871167 Babol,Iran);Fereydoon Yaripour(Catalyst Research Group,Petrochemical Research and Technology Company NPC,Tehran,Iran) |
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| 基金项目： | supported by Iranian Nanotechnology Initiative Council |
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| 摘 要： | The capability of sol-gel and conventional precipitation techniques for the synthesis of nanocrystalline γ-alumina was investigated. These catalysts were used for vapor-phase dehydration of methanol to dimethyl ether in a fixed-bed reactor under the same operating conditions (T = 300 ?C, P = 1 bar, LHSV = 2.8, 11.7, 26.1 h?1) and characterized by means of N2 adsorption-desorption, NH3-TPD, XRD, TGA and SEM techniques. According to the experimental results, the catalysts prepared using sol-gel method in non-aqueous medium showed better performance compared with those prepared by other methods.
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| 关 键 词： | γ-Al2O3 sol-gel precipitation methanol dehydration dimethyl ether |
| 收稿时间： | 20 October 2010 |
| 修稿时间： | 5 December 2010 |
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