甲醇制二甲醚用工业催化剂的失活原因  

STUDY ON INDUSTRIAL CATALYST DEACTIVATION FOR DEHYDRATION OF METHANOL TO DIMETHYL ETHER

作　　者：史立杰 李晨佳 常俊石 

机构地区：[1]新地能源工程技术有限公司北京技术研发中心,北京100176

出　　处：《精细石油化工》2014年第4期22-25,共4页Speciality Petrochemicals

摘　　要：采用低温氮吸附、热重-差示扫描量热、X射线衍射、红外、扫描电子显微镜等手段,研究了工业上使用的氧化铝系二甲醚催化剂的失活原因.结果表明：在工业使用条件下,二甲醚催化剂床层积炭2.43％-4.46％;部分γ-氧化铝发生再水合反应,生成薄水铝石,晶粒度变大,表面积下降,这些原因共同导致了催化剂活性下降.The deactivation of industrial catalyst XAD-101 for dimethyl ether（DME） synthesis was characterized by means of nitrogen adsorption-desorption, thermogravimetry-differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. The results indicated that the catalyst bed was prone to carbon deposition in the range of 2.43 - 4. 46%, and part of γ-alumina was capable of rehydration under industrial conditions, with boehmite obtained as product, due to which, the grain size of γ-alumina increased, while the specific surface ar- ea decreased. As a result, the catalyst showed low activity for dehydration.

关 键 词：甲醇 二甲醚 Γ-氧化铝 失活 

分 类 号：O643.361[理学—物理化学]