SBA-15 Supported Cesium Catalyst for Methyl Methacrylate Synthesis via Condensation of Methyl Propionate with Formaldehyde

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• 作者：Bin Li ; Ruiyi Yan ; Lei Wang ; Yanyan Diao ; Zengxi Li ; Suojiang Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：January 29, 2014
• 年：2014
• 卷：53
• 期：4
• 页码：1386-1394
• 全文大小：498K
• ISSN：1520-5045

文摘

SBA-15 supported metal-doped cesium ion catalysts were prepared by the impregnation method and characterized by N₂ adsorption鈥揹esorption, XRD, FT-IR, and SEM and TEM. The characterization results indicated that the ordered hexagonal mesoporous structure of the support remained intact after incorporating cesium. Stepwise TPD of NH₃ and CO₂ was used to estimate the strength and the number of surface acid and base sites, respectively. The effects of Cs-loading, sources of cesium cation, and template concentration on the physicochemical properties and catalytic performance were investigated. The catalytic performance was evaluated by the gas-phase condensation reaction of methyl propionate with formaldehyde in a fixed-bed reactor. Compared with the amorphous SiO₂ catalyst, at similar Cs loading (ca. 15 wt %) SBA-15 catalyst exhibited better selectivity and yield.