Preparation of Pd-In/C Bimetallic Catalysts Preparation and its Application on Catechol Phenols of Pyrolysis Bio-oil Hydrotreatment

Abstract

Pyrolyisis  bio-oil cannot be directly used as a transportation fuel without prior upgrading. Usually hydrotreating is used in upgrading pyrolysis bio-oil to improve the quality. Active component of common bio-oil hydrogenation catalyst include Pt, Pd, Ru etc. Metallic indium was induced as a cheap substitute for the expensive Pd catalyst . The bimetallic catalyst of Pd-In/C was prepared by means of wet impregnation. The desired catalyst was obtained under the conditions of pH = 6.0, 500r/min, 90min and 100℃. And the desired catalyst was used to hydrogenate catechol at the conditions of 200℃, 5.0MPa H₂, 2.0h and 0.25g Pd-In/C. After reaction, the catechol phenols of pyrolysis bio-oil could be completely converted into alcoholic compounds. The effective In promotion is most probably related to the formation of a new alloy phase or intermetallic Pd and In compound. The bimetallic catalyst  Pd-In/C provides a new choice for bio-oil hydrogenation.