关键词: 甲醇, 催化剂, 溶胶-凝胶, 全氟磺酸树脂, 二甲醚

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