Morphology and activity relationships of macroporous CuO-ZnO-ZrO2 catalysts for methanol synthesis from CO2 hydrogenation

• Published in: Rare metals Vol. 35; no. 10; pp. 790 - 796
• Main Authors: Wang, Yu-Hao, Gao, Wen-Gui, Wang, Hua, Zheng, Yan-E, Li, Kong-Zhai, Ma, Ru-Gui
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 01.10.2016; Springer Nature B.V
• Subjects: Adsorption; Biomaterials; Carbon dioxide; Catalysts; Catalytic converters; Chemical synthesis; Chemistry and Materials Science; CO2转化率; Copper; Electron microscopy; Emulsion polymerization; Energy; Hydrogenation; Materials Engineering; Materials Science; Metallic Materials; Methanol; Morphology; Nanoscale Science and Technology; Physical Chemistry; Polymethyl methacrylate; Pore size; Scanning electron microscopy; Sintering (powder metallurgy); Transmission electron microscopy; Zinc oxide; Zirconium dioxide; 加氢合成; 大孔结构; 形态; 扫描电子显微镜; 活性; 甲醇催化剂; 透射电子显微镜; catalysts; CuO–ZnO–ZrO; Activity; Macroporous structure; CO; hydrogenation; Methanol
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-015-0520-7

A series of macroporous CuO-ZnO-ZrO2 （CZZ） catalysts with different Zn/Zr ratios were successfully prepared by template method and characterized by X-ray diffraction （XRD）, N2 adsorption, reactive N2O adsorption, scanning electron microscopy （SEM）, H2 temperature-pro- grammed reduction （H2-TPR）, and transmission electron microscopy （TEM）. The activity of the catalysts was tested for methanol synthesis from CO2 hydrogenation. It is found that the increase in the Zn/Zr ratio could lead to the sintering of the catalysts, destroying the macroporous structure integrity. The macroporous CZZ catalysts own lower Zn/Zr ratio, exhibiting a better morphology and activity. For comparison, the conventional nonporous CZZ catalysts were also investigated. The results show that the CZZ catalysts with macroporous structure own smaller particles, higher CO2 conversion, and CH3OH yield. It reveals that the macroporous structure could inhibit the growth of the par- ticle size, and the special porous structure is favorable for diffusion and penetration of CO2, which could improve the catalytic activities.