Synthesis characterization and catalytic evaluation of Ni/ZrO2/SiO2 aerogels catalysts |
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| Authors: | Chun-guang Gao Yong-xiang Zhao Yin Zhang Dian-sheng Liu |
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| Affiliation: | (1) Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan, 030006, China;(2) Institute of Applied Chemistry, Shanxi University, Taiyuan, 030006, China |
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| Abstract: | The Ni/ZrO2/SiO2 aerogels catalysts were synthesized via three different routes: (i) impregnation ZrO2–SiO2 composite aerogels with a aqueous solution of Ni(NO3)2, (ii) impregnation SiO2 aerogels with a mixed aqueous solution of Ni(NO3)2 and ZrO(NO3)2 · 2H2O, (iii) one-pot sol–gel procedure from precursors Ni(NO3)2/ZrO(NO3)2 · 2H2O/Si(OC2H5)4. These catalysts were characterized by X-ray diffraction (XRD), temperature-programmed reduction (TPR), ammonia temperature-programmed desorption (NH3-TPD), N2 adsorption–desorption isotherms and Fourier transform infrared (FT-IR). The Liquid-phase hydrogenation of maleic anhydride (MA) was performed over these catalysts. The results revealed that the different preparation routes result in a difference between the obtained samples, concerning the crystal structure and composition, surface acidity, mixed level of each component, texture, and catalytic selectivity. |
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| Keywords: | ZrO2 and SiO2 Aerogels Sol– gel Ni Maleic anhydride |
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