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Catalysis Letters

, Volume 149, Issue 2, pp 373–389 | Cite as

Aldol Condensation Reaction of Methyl Acetate and Formaldehyde Over Cesium Oxide Supported on Silica Gel: An Experimental and Theoretical Study

  • Teng He
  • Yixin Qu
  • Jidong WangEmail author
Article
  • 32 Downloads

Abstract

The catalytic performance of cesium oxide supported on three types of silica gel A-type (A-silica), B-type (B-silica) and C-type (C-silica) was tested for the aldol condensation of methyl acetate (Ma) and formaldehyde (FA) to methyl acrylate (MA). The catalysts were characterized using TEM, BET, XRD, FTIR, TG, XPS, and CO2-TPD and the reaction mechanisms were explored using DFT calculations. To obtain high selectivity of MA, appropriate amount of Cs loading is required since much higher loading of Cs leads to excessive decomposition of Ma and/or MA. On the Cs/silica, the Si–O–Cs species generated from the reaction of cesium oxide with silanol groups are the active sites as demonstrated by characterization and the DFT calculations. Silica gels with larger pore size and pore volume are preferred since these facilitate the contact of the reactants with active sites and provide higher capacity for accommodation of coke. As compared with Cs/SBA-15, Cs/B-silica seems more prospective for industrial application due to the lower cost of silica gel and even better performance.

Graphical Abstract

Keywords

Methyl acetate Formaldehyde Aldol condensation Cesium oxide Silica gel DFT calculation 

Notes

Compliance with Ethical Standards

Conflict of interest

The authors declare no competing financial interest.

Supplementary material

10562_2018_2609_MOESM1_ESM.doc (280 kb)
Supplementary material 1 (DOC 279 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Beijing Key Laboratory of Membrane Science and Technology, College of Chemical EngineeringBeijing University of Chemical TechnologyBeijingPeople’s Republic of China

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