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Sulfur promotion in Au/C catalyzed acetylene hydrochlorination

DOI: 10.1002/smll.202007221 DOI Help

Authors: Simon R. Dawson (Cardiff Catalysis Institute, Cardiff University) , Samuel Pattisson (Cardiff Catalysis Institute, Cardiff University) , Grazia Malta (Cardiff Catalysis Institute, Cardiff University) , Nicholas F. Dummer (Cardiff Catalysis Institute, Cardiff University) , Louise R. Smith (Cardiff Catalysis Institute, Cardiff University) , Anna Lazaridou (Cardiff Catalysis Institute, Cardiff University) , Christopher S. Allen (University of Oxford; Diamond Light Source) , Thomas E. Davies (Cardiff Catalysis Institute, Cardiff University) , Simon J. Freakley (University of Bath) , Simon Kondrat (Loughborough University) , Christopher J. Kiely (Lehigh University) , Peter Johnston (Johnson Matthey) , Graham J. Hutchings (Cardiff Catalysis Institute, Cardiff University)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Small

State: Published (Approved)
Published: February 2021
Diamond Proposal Number(s): 23498 , 15214 , 15151

Open Access Open Access

Abstract: The formation of highly active and stable acetylene hydrochlorination catalysts is of great industrial importance. The successful replacement of the highly toxic mercuric chloride catalyst with gold has led to a flurry of research in this area. One key aspect, which led to the commercialization of the gold catalyst is the use of thiosulphate as a stabilizing ligand. This study investigates the use of a range of sulfur containing compounds as promoters for production of highly active Au/C catalysts. Promotion is observed across a range of metal sulfates, non‐metal sulfates, and sulfuric acid treatments. This observed enhancement can be optimized by careful consideration of either pre‐ or post‐treatments, concentration of dopants used, and modification of washing steps. Pre‐treatment of the carbon support with sulfuric acid (0.76 m) resulted in the most active Au/C in this series with an acetylene conversion of ≈70% at 200 °C.

Journal Keywords: acetylene; gold; hydrochlorination; sulfur; VCM

Subject Areas: Chemistry

Diamond Offline Facilities: Electron Physical Sciences Imaging Centre (ePSIC)
Instruments: B18-Core EXAFS , E01-JEM ARM 200CF

Added On: 01/03/2021 15:39


Discipline Tags:

Physical Chemistry Catalysis Chemistry

Technical Tags:

Microscopy Spectroscopy Electron Microscopy (EM) X-ray Absorption Spectroscopy (XAS)