Influence of Al Oxides on Cs-SiO2 Catalysts for Vapor Phase Aldol Condensation of Methyl Acetate and Formaldehyde

作者：Senlin Deng, Tingting Yan, Ran Ran, Jie Li, Guoliang Zhang, Chunshan Li · 发表于：Industrial & Engineering Chemistry Research · 年份：2022 · DOI：10.1021/acs.iecr.2c00444 · 被引用次数：43 · 研究领域：Zeolite Catalysis and Synthesis、Mesoporous Materials and Catalysis、Catalysis and Oxidation Reactions

A novel Al-promoted Cs-SiO 2 catalyst was synthesized via impregnation methods and applied in the aldol condensation reaction of methyl acetate (Ma) with formaldehyde (FA) to synthesize methyl acrylate (MA). Promotion effects of Al oxides on Cs-SiO 2 catalysts were systematically investigated. The physical–chemical properties of synthesized catalysts were characterized through XRD, FT-IR, EDS mapping, N 2 physical adsorption, NH 3 -/CO 2 -TPD, Py-IR, XPS, solid-state MAS NMR, and TG. Subsequently, the catalytic performance of fabricated catalysts was evaluated in a fixed-bed microreactor. Reaction parameters, Cs 2 O and Al 2 O 3 contents, as well as calcination temperature were optimized. The evaluation of catalytic stability was conducted under optimal reaction conditions. As a result, the introduction of Al species into Cs-SiO 2 endowed the Al–Cs–SiO 2 catalyst with superior catalytic performance and good reusability.