β-Mo2C/γ-Al2O3 catalyst for one step CO hydrogenation to produce alcohols

• Published in: Catalysis today Vol. 402; pp. 328 - 334
• Main Authors: Luo, Mingsheng, Li, Chenmeng, Liu, Qinglong, Yang, Zhi, Wang, Yatao, Li, Hongjuan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.09.2022
• Subjects: CO hydrogenation; Fisher-Tropsch synthesis; Syngas-to-alcohol; β-Mo2C catalyst; γ-Al2O3 support; β-Mo2C catalyst; γ-Al2O3 support; CO hydrogenation; Fisher-Tropsch synthesis; Syngas-to-alcohol
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2022.05.039

Direct hydrogenation of CO to alcohols through Fischer-Tropsch reaction process is taken great interest in recent years. In this study, a series of β-Mo2C/γ-Al2O3 catalyst are prepared to investigate the influence of carbon and molybdenum precursor, calcination temperature, as well as the molar ratio of the carbon precursor to molybdenum precursor compounds on catalyst microstructures and the catalytic performance. The microstructure characteristics of the catalysts were examined with XRD, BET, ICP, SEM and CO-TPD. The performance test of the catalysts for syngas-to-alcohol was investigated in a fixed-bed reactor. Properly excessive amount of hexamethylenetetramine as carbon precursor calcined at a high temperature (≥700 ℃) favors the formation of high crystalline β-Mo2C on γ-Al2O3 carrier. Catalysts with different amount of Mo were prepared to study the effect of active metal loading on microstructure and catalytic performance. The results show that the particle size of β-Mo2C and CO dissociation adsorption capacity, as well as the CO conversion increases with raised Mo loading. The selectivity of all higher alcohols reached the maximum when 25 % of Mo was loaded. [Display omitted] •CO hydrogenation over β-Mo2C /γ-Al2O3 catalyst.•Calcination pretreatment at 700 ℃.•Carbon and molybdenum Precursor molar ratio of 1:9.•N, N-dimethyl-p-phenylenediamine as carbon source for Mo2C catalyst preparation.•25 % Mo loading in the Mo2C catalyst.