Jump to main content
Jump to site search


Gas–solid acetylene dimerization over copper-based catalysts

Author affiliations

Abstract

Acetylene dimerization is an important step in an acetylene-based process for chloroprene production, and the traditional catalyst for this transformation is the Nieuwland catalyst in a bubble column reactor. However, the drawbacks of this catalyst are the use of high concentration of a copper reagent, low acetylene conversion and monovinylacetylene (MVA) selectivity, and the difficulty to generate or reuse the catalytic system. Therefore, in this study, we first reported a gas–solid acetylene dimerization reaction by applying copper-supported catalysts, which were prepared via an impregnation technique using CuCl as the precursor. The catalytic activity was examined and discussed in detail by modification of the impregnation solvent, Cu loading amount, reaction temperature, and the acetylene gas hourly space velocity. Under optimal conditions, the catalyst exhibited a maximum acetylene conversion of 48.3% and a monovinylacetylene selectivity of 87.4%. The catalysts were characterized by TGA, XRD, H2-TPR, TEM, BET, XPS and ICP-AES. Not only the preparation, isolation and recycling of the supported catalyst were easy in the gas–solid reaction, but also the supported catalyst overcame the shortcomings of the liquid phase catalyst. The loss of the Cu active species is concluded to be the main factor causing the decrease in the catalytic activity.

Graphical abstract: Gas–solid acetylene dimerization over copper-based catalysts

Back to tab navigation

Publication details

The article was received on 29 Apr 2019, accepted on 01 Aug 2019 and first published on 01 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ02182E
New J. Chem., 2019, Advance Article

  •   Request permissions

    Gas–solid acetylene dimerization over copper-based catalysts

    C. Li, J. Luo, Q. Zhang, J. Xie, J. Zhang and B. Dai, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ02182E

Search articles by author

Spotlight

Advertisements