Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (3): 322-331.DOI: 10.11944/j.issn.1000-0518.2020.03.190192

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Catalytic Hydrogenation Performance of p-tert-Butyl-α-Methyl Cinnamaldehydeover Precious Metal Catalysts

Lihui ZENGab,Yuefeng LIb,Haoxiang YANa,Yongkang ZENGb,Zhixiang ZHANGb,Zhongwen LIUa,Zhaotie LIUac*()   

  1. aKey Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education),School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi'an 710119,China
    bKaili Catalyst & New Materials Co.,Ltd. Xi'an 710201,China
    cCollege of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China
  • Received:2019-07-09 Accepted:2020-02-11 Published:2020-03-01 Online:2020-03-10
  • Contact: Zhaotie LIU
  • Supported by:
    Supported by the Key Industry Innovation Chain of Shaanxi Science and Technology Department(group)(No.2019ZDLGY06-04)

Abstract:

In this paper, Fourier transform infrared spectroscopy (FT-IR), N2 adsorption-desorption, X-ray diffraction (XRD )andtransmission electron microscopy (TEM) were used to characterize the activated carbon treated via microwave with KOH. The results show that the oxygen-containing groups on the surface of activated carbon increase greatly, and the number of micropores decrease significantly. The selective catalytic hydrogenation performances of p-tert-butyl-α-methyl cinnamaldehyde over Pt, Pd, Ru and Rh supported on activated carbon were investigated. The Pt/C catalyst shows excellent selective hydrogenation for C=O, while the Pd/C catalyst has good selectivity for hydrogenation of C=C. The product distribution of selective hydrogenation of p-tert-butyl-α-methylcinnamaldehyde catalyzed by Pd-Pt bimetallic catalyst was also studied. The results show that the selective hydrogenation of C=O is gradually increased with an increase of Pt content, while the selectivity of hydrogenation of C=C decreases gradually over the Pd-Pt bimetallic catalyst. An optimal catalytic performance is obtained over Pd-Pt bimetallic catalyst when m(Pd)∶m(Pt)=4∶1.

Key words: microwave-assisted, activated carbon, noble metal supported catalyst, selective hydrogenation, p-tert-butyl-α-methylcinnamaldehyde