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Reaction Kinetics, Mechanisms and Catalysis

, Volume 128, Issue 1, pp 413–425 | Cite as

The dimensions of different copper species on Cu/SiO2 catalysts in the one-step condensation of isoprene via formaldehyde and isobutene

  • Rixiang Zhang
  • Hailin Zhu
  • Shan XuEmail author
  • Xu Luo
  • Guojun Zou
  • Li Liu
Article
  • 33 Downloads

Abstract

The one-step condensation of isoprene from vapor-phase formaldehyde and isobutene is an environmental-friendly synthesis technology in the chemical industry. This work reports the synthesis of isoprene in presence of Cu/SiO2 catalysts with different size of copper species using an impregnation method. The catalysts were characterized by UV–vis absorption spectra, Py-IR, H2-TPR, NH3-TPD, XRD, XPS techniques to better understand the catalytic performance. The increasing activity of the catalysts follows the order of the particle size of copper species from large to small. The smaller particle results more exposed Cu+ sites which might active the Carbonyl in formaldehyde. In addition, the medium strong Lewis acid sites on the dry catalysts might take the mainly effect in this Prins reaction.

Keywords

Isoprene Particle size Cu+ sites Prins Formaldehyde 

Notes

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Lanzhou Institute of Chemical Physics, China Academy of SciencesLanzhouChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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