Correlating ultrasonic impulse and addition of ZnO promoter with CO2 conversion and methanol selectivity of CuO/ZrO2 catalysts

Collins I. Ezeh, Xiaogang Yang, Jun He, Colin Snape, Xiao Min Cheng

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)
3 Downloads (Pure)

Abstract

The thermal characteristics of Cu-based catalysts for CO2 utilization towards the synthesis of methanol were analysed and discussed in this study. The preparation process were varied by adopting ultrasonic irradiation at various impulses for the co-precipitation route and also, by introducing ZnO promoters using the solid-state reaction route. Prepared catalysts were characterised using XRD, TPR, TPD, SEM, BET and TG-DTA-DSC. In addition, the CO2 conversion and CH3OH selectivity of these samples were assessed. Calcination of the catalysts facilitated the interaction of the Cu catalyst with the respective support bolstering the thermal stability of the catalysts. The characterisation analysis clearly reveals that the thermal performance of the catalysts was directly related to the sonication impulse and heating rate. Surface morphology and chemistry was enhanced with the aid of sonication and introduction of promoters. However, the impact of the promoter outweighs that of the sonication process. CO2 conversion and methanol selectivity showed a significant improvement with a 270% increase in methanol yield.

Original languageEnglish
Pages (from-to)48-56
Number of pages9
JournalUltrasonics Sonochemistry
Volume42
DOIs
Publication statusPublished - Apr 2018

Keywords

  • Carbon dioxide
  • Catalysts
  • Hydrogenation
  • Methanol synthesis
  • Thermal stability

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

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