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Effect of CeO_(2)on Activity of Catalysts cuo/ZnO/Al_(2)O_(3)/CeO_(2)for Synthesis of Methanol

中国炼油与石油化工:英文版 2023年第3期25卷 104-114页

作者： Zhou Songhua Li Wenbo Wu Zongjin Chen Zhongyang Huang Chen Zhang Chuanwei Wang Bo Pan Hongyan Lin Qian 无 Guizhou Tianfu Chemical Industry Co. LtdFuquan550501China Department of Chemical Engineering School of Chemistry and Chemical EngineeringGuizhou UniversityGuiyang 550025China Guizhou Key Laboratory for Green Chemical and Clean Energy Technology Guiyang 550025China

The size of the nanoparticles and the number of oxygen vacancies have a significant effect on the catalytic activity of copper-based catalysts used for the synthesis of methanol from *** this study,the authors prepared a series of catalysts cuo/ZnO/Al_(2)O_(3)/CeO_(2)(CZAC)with cuo particles of different sizes and varying number of oxygen vacancies on the surface by changing the added volume of CeO2 by using the co-precipitation *** properties of the catalysts were characterized and their activity was evaluated by using high-pressure fixed-bed reaction *** results showed that the addition of CeO_(2)to cuo/ZnO/Al_(2)O_(3)not only influenced the size of the cuo particles and metal-metal interactions,but also had an effect on the concentrations of oxygen vacancies and strongly basic *** presence of cuo particles of small sizes and a large numbers of oxygen vacancies on the surface of the catalyst were beneficial to its activity for the synthesis of *** catalyst CZAC,when modified by 5%of CeO_(2),recorded cuo particles of the smallest size(8.9 nm),strong intermetallic interactions,and the highest concentrations of oxygen vacancies and strongly basic *** also exhibited the highest catalytic activity,with a space-time yield of methanol of 0.315 g/(h·g)that was higher than that of the enterprise RK-5 catalyst[0.215 g/(h·g)].

关键词： catalyst amount of CeO_(2)added size of cuo particles oxygen vacancies methanol synthesis

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