Effect of hydrothermal environment on Cu-ZnO/Al2O3 catalyst for hydrogenation of CO2 to methanol

Li, Jin; Guo, Qing; Zhao, Xu; Hu, Yongke; Zhang, Shizhong; Zhao, Yu; Li, Shaozhong

doi:10.1016/j.mcat.2023.113494

Cited by 2 publications

(1 citation statement)

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“…However, the rarity and high cost of noble metals limit their potential for large-scale applications. In 2 O 3 has been proven theoretically and experimentally to be highly selective for CO 2 hydrogenation to methanol. , The surface of h -In 2 O 3 (104) exhibits excellent catalytic performance, and the three coordinated Ov sites on c -In 2 O 3 facilitate the formation of CH 3 OH rather than CO. , Numerous studies have found that loading precious metals (Pd, Pt, Rh, and Ru) can effectively enhance In 2 O 3 -based hydrogen activation ability. − Wang et al discovered the ZnO-based solid–solution catalyst system, where ZnZrO x has become an efficient choice for CO 2 hydrogenation to methanol, and has been extensively studied on the basis of solid–solution catalysts. − Cu-based catalysts, as the most widely used catalyst system for CO 2 hydrogenation to methanol, exhibit low cost and excellent activity and have been applied in industrial production. − For example, Cu-based catalysts derived from layered double hydroxide (LDH) have been reported to exhibit high activity and excellent stability over an operation time of 2400 h. , However, the active sites of Cu-based catalysts have not been clearly resolved.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Cu/ZnO/Al₂O₃ Catalysts for CO₂ Hydrogenation to Methanol

Zhang,

Chen,

Han

et al. 2024

Ind. Eng. Chem. Res.

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Cu/ZnO/Al 2 O 3 catalysts are widely used in methanol synthesis due to their low cost and high catalytic activity. The structural and surface characteristics of Cu are crucial to the formation of the active sites for methanol production. In this study, a series of methods for the synthesis of Cu/ZnO/Al 2 O 3 are employed to modulate the catalyst structure and catalytic efficiency for the hydrogenation of CO 2 to methanol. A correlation of catalytic activity with the Cu 0 surface area and Cu particle sizes has been established. The Cu/ZnO/Al 2 O 3 catalyst derived from hydrotalcite-like precursor (CZA-LDH) exhibits the maximum Cu 0 specific surface area, the smallest Cu particle size, and high dispersion of elements, yielding the largest methanol production rate, which is comparable to the commercial Cu catalyst. Stability testing shows that the CZA-LDH catalyst can retain ∼94% of the initial activity. The in situ Fourier transform infrared spectroscopy analysis indicates that HCOO*, CH 3 O* intermediates, and product CH 3 OH are generated on the catalyst surface, and the reaction follows the formate pathway.

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