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Enhanced Ethylene Glycol Selectivity of CuO-La2O3/ZrO2 Catalyst: The Role of Calcination Temperatures.
Ding, Jian; Liu, Huimin; Wang, Meihui; Tian, Haifeng; Wu, Jianbing; Yu, Gewen; Wang, Yaxiong.
Afiliação
  • Ding J; Inner Mongolia Key Laboratory of Coal Chemical Engineering & Comprehensive Utilization, School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, PR China.
  • Liu H; Inner Mongolia Cooperative Innovation Center for Green Coal Mining & Green Utilization, Baotou 014010, Inner Mongolia, PR China.
  • Wang M; Inner Mongolia Key Laboratory of Coal Chemical Engineering & Comprehensive Utilization, School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, PR China.
  • Tian H; Inner Mongolia Cooperative Innovation Center for Green Coal Mining & Green Utilization, Baotou 014010, Inner Mongolia, PR China.
  • Wu J; Inner Mongolia Key Laboratory of Coal Chemical Engineering & Comprehensive Utilization, School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, PR China.
  • Yu G; Inner Mongolia Cooperative Innovation Center for Green Coal Mining & Green Utilization, Baotou 014010, Inner Mongolia, PR China.
  • Wang Y; College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, Gansu, PR China.
ACS Omega ; 5(43): 28212-28223, 2020 Nov 03.
Artigo em Inglês | MEDLINE | ID: mdl-33163804
ABSTRACT
The CuO-La2O3/ZrO2 catalysts calcined at different temperatures from 500 to 800 °C were studied for the hydrogenation of oxalates to ethylene glycol (EG). Along with the increase of calcination temperatures, the BET surface area, pore volume, and Cu dispersion decreased, whereas the crystallite sizes of Cu species increased. Interestingly, the superior performance such as a 98% selectivity of EG in dimethyl oxalate hydrogenation or a 96.5% selectivity of EG in diethyl oxalate hydrogenation was obtained over the catalyst calcined at 700 °C. Essentially, the surface synergism between Cu species and monoclinic ZrO2 was enhanced by the higher calcination temperature, resulting in the remarkable surface adsorption and activation of H2. Besides, the increase of calcination temperature significantly reduced the surface acidity and basicity, which could effectively suppress the byproduct formation.
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: ACS Omega Ano de publicação: 2020 Tipo de documento: Artigo

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: ACS Omega Ano de publicação: 2020 Tipo de documento: Artigo