Promoting effect of acid treatment on Pd-Ni/SBA-15 catalyst for complete oxidation of gaseous benzene

Abstract

A novel Pd-Ni/SBA-15 catalyst synthesized by co-impregnation of Pd and Ni precursors onto porous SBA-15 silica support was used for catalytic removal of gaseous benzene. Compared to original Pd/SBA-15 catalyst, the addition of Ni significantly promoted the catalytic performance. Moreover, with introducing acid treatment, the new Pd-Ni/SBA-15 catalyst showed much better catalytic activity than both Pd/SBA-15 catalyst and original Pd-Ni/SBA-15 catalyst, and the benzene could be completely oxidized into CO2 and H2O at 260°C over the new catalyst at a high space velocity of 12,0000mL/(gh).