Abstract: A new catalyst perfluorosulfonate resin/SiO2 for vapor phase dehydration of methanol（Me） to dimethyl ether（DME） was prepared by sol-gel method. The as-prepared catalyst was characterized by X-ray diffraction，Fourier transform infrared spectroscopy，thermogravimetry-dirfferential scanning calorimetry，low-temperature nitrogen adsorption method and NH3 temperature-programmed desorption. The effects of reaction conditions such as temperature，liquid hourly space velocity（LHSV） and active component content on the reaction performance and catalyst stability were investigated. The results indicated that the BET specific surface area of microporous catalyst was 820m2/g. After a continuous run under conditions：w(PFSA)=10.0%，LHSV(Me)=1h?1，t=184℃，it is found that the activity and stability of the catalyst kept steady with the Me conversion，DME selectivity being >91.5%，>99.9% respectively.

Key words: methanol, catalyst, sol-gel, perfluorosulfonate resin（PFSA）, dimethyl ether

摘要： 采用溶胶-凝胶法制备了用于甲醇气相脱水制二甲醚的新型催化剂全氟磺酸树脂/二氧化硅，应用X射线衍射、红外光谱、热重-差示扫描量热、低温氮物理吸附和氨程序升温脱附法对所得催化剂进行了表征。考察了反应温度、甲醇液空速、全氟磺酸树脂含量对甲醇气相催化脱水制二甲醚反应性能和催化剂稳定性的影响。结果表明，催化剂比表面积达820m2/g，在全氟磺酸树脂负载量10.0%、甲醇液空速1h?1、反应温度184℃时，甲醇转化率92.0%，二甲醚选择性99.9%，经350h实验测试，活性和稳定性没有明显变化。

关键词: 甲醇, 催化剂, 溶胶-凝胶, 全氟磺酸树脂, 二甲醚