Urea-derived Cu/ZnO catalyst being dried by supercritical CO2 for low-temperature methanol synthesis

FUEL

卷:268

Article

Zhang, Peipei¹  Araki, Yuya¹  Feng, Xiaobo¹  Li, Hangjie¹  Fang, Yuan¹  Chen, Fei¹  Shi, Lei⁴  Peng, Xiaobo³  Yoneyama, Yoshiharu¹  Yang, Guohui^1,2  Tsubaki, Noritatsu¹ 

[1] Univ Toyama, Sch Engn, Dept Appl Chem, Gofuku 3190, Toyama 9308555, Japan

[2] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

[3] Natl Inst Mat Sci, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[4] Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China

关键词: Methanol synthesis;    Supercritical phase CO2 drying;    Homogeneous precipitation;    Urea hydrolysis;    Syngas;   

DOI  :  10.1016/j.fuel.2020.117213

来源: Elsevier

【 摘 要 】

Methanol synthesis from syngas is a crucial process in the transformation of coal, natural gas and biomass into high-value added products. The high CO conversion and methanol yield are challenging in low-temperature methanol synthesis, thus improving catalyst activity is necessary. Cu/ZnO nanoparticles with a narrow size distribution were synthesized via homogeneous precipitation method using urea as the precipitant, being followed by supercritical CO2 drying treatment (named as CZhp-S). The analysis results rendered that CZhp-S had a lower reduction temperature, higher Cu-0 specific surface area and smaller crystal sizes compared with those of the catalyst prepared by co-precipitation method with conventional drying process (named as CZcp-H). Due to the large specific surface area and the enhanced amount of active sites, the CZhp-S with optimized supercritical CO2 drying treatment condition demonstrated a maximum CO conversion of 52.7% and STY of methanol 87.6 g(MeOH)/kg(catalyst).h(-1) for low-temperature methanol synthesis from syngas, which were much higher than those of CZcp-H (CO conversion 36.5%, STY of methanol 62.9 g(MeOH)/kg(catalyst).h(-1)).

【 授权许可】

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