Preparation of composite nanocarrier TiO2-ZrO2 supported NiB and its Catalytic Performance for Hydrogenation
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中图分类号:TQ333

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    Abstract:

    A TiO2-ZrO2 composite carrier was prepared by sol-gel method. Subsequently, a supported Ni-B/TiO2-ZrO2 catalyst was prepared by metal induced electroless plating. The preparation processes of carrier and catalyst were optimized by single factor experiment. The suitable carrier preparation conditions were as follows: molar ratio of Zr/Ti 0.6, calcination temperature 550℃, and calcination time 4 h. The catalyst preparation conditions were as follows: microwave intervention temperature 50℃, microwave heating time 3 min, n(Ni): n(B)=1:2. The catalyst prepared under these conditions was used for the hydrogenation of rosin, and the conversion rate of abietic resin acids was over 99%. In addition, the catalyst could be reused for 7 times. XRD, XPS, TEM and BET were employed to characterize the structure and properties of the catalyst before and after deactivation. The results showed that Ni-B was supported on the TiO2-ZrO2 carrier in an amorphous state with good dispersion and average particle size of about 25 nm. However, the content of Ni0 and B0 on the deactivated catalyst decreased, and the active components were lost and oxidized, which might be the main cause of catalyst deactivation. Key words: composite nanocarrier; Ni-B; amorphous catalyst; rosin; hydrogenation

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History
  • Received:December 29,2018
  • Revised:July 19,2019
  • Adopted:July 22,2019
  • Online: September 27,2019
  • Published:
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