A Mesoporous Ce0.5Zr0.5O2 Solid Solution Catalyst for CO Hydrogenation to iso-C4 Hydrocarbons

Abstract

Mesoporous Ce 0.5 Zr 0.5 O 2 solid solution catalyst was synthesized by a sol-gel process using block copolymer Pluronic P123 as the template. The as-prepared catalyst was characterized by X-ray diffraction, H 2 -Temperature-programed reduction, BET, and X-ray photoelectron spectra techniques. The catalytic properties of the catalyst were evaluated by the synthesis of iso-C 4 hydrocarbons via CO hydrogenation. The mesoporous catalyst showed much better catalytic selectivity and yield of isobutene and isobutane (i-C 4 ) from CO hydrogenation at 673-723 K, 5.0 MPa, and 720 h -1 , than the solid Ce 0.5 Zr 0.5 O 2 catalyst prepared by coprecipitation. This was due to the higher BET surface area, pore volume and the reducibility of the mesoporous Ce 0.5 Zr 0.5 O 2 catalyst.