Study on preparation of transition metal-supported Silicalite-1 zeolite catalyst and its catalytic performance for furfural hydrogenation
Furfural is an important biomass-derived platform molecule,and developing robust catalysts with high activity and stability for furfural hydrogenation is a research hotspot.However,noble metal catalysts suffer from high costs,which cannot satisfy the demand towards large-scale industrial production.Herein,the transition metal-supported Silicalite-1 zeo-lite catalysts were successfully synthesized by a one-step hydrothermal method,and the influence of the introduction of four different types of transition metal elements on the structure of the Silicalite-1 zeolite was studied.Comprehensive character-ization results showed that the crystallinity of the zeolite was not affected by low metal loading,and the metal species were uniformly dispersed on the surface of zeolite.In the hydrogenation of furfural,Ni-based catalyst S-Ni2 showed excellent catalytic activity toward furfural transformation with 96%furfural conversion and 71%furan selectivity.Cu-based catalyst S-Cu1 showed extraordinary selectivity toward furfuryl alcohol(100%),which was much higher than that over Cu-based catalyst prepared by impregnation method(76%).Therefore,compared with the impregnation method,one-step hydrother-mal method could be used to obtain a catalyst with high selectivity,and the method wass also simple and easy to operate.This work would open up a new direction for developing highly efficient,stable,and low-cost hydrogenation catalysts,and promote the valorization of biomass.
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