title: Nanosized CuO and ZnO catalyst supported on titanium chip for conversion of carbon dioxide to methyl alcohol.
abstract: In order to reutilize spent metallic titanium chips (TC) as catalyst support or photocatalytic materials, the surface of the TC was modified by thermal treatment under air atmosphere. TC-supported nanosized CuO and ZnO catalysts were prepared by impregnation (IMP) and co-precipitation (CP) method, respectively. The catalytic activity for CO2 hydrogenation to CH3OH was investigated using a flow-typed reactor under various reaction pressures. The crystals of CuO and ZnO was well formed on TC. CO2 conversion, CH3OH selectivity, and CH3OH yield were obtained as a function of time on stream over CuO-ZnO/TC catalysts. Conversion of CO2 to CH3OH over CuO-ZnO/TC catalyst by CP method and CuO/ZnO/TC catalyst by IMP method were ca. 16% and ca. 12%, respectively. Conversion of CO2 over CuO-ZnO/TC catalyst by CP method was increased with increasing reaction temperature in the range of 15-30 atm. Maximum selectivity and yield to CH3OH over CuO-ZnO/TC at 250 degrees C were ca. 90% at 20 atm and ca. 18.2% at 30 atm, respectively.
authors.affiliation: Department of Chemical Engineering, Sunchon National University, Suncheon, Jeonnam 540-742, South Korea.
authors.forename: Hyeong-Seok
authors.initials: HS
authors.lastname: Seo
authors.forename: Chul-Min
authors.initials: CM
authors.lastname: Park
authors.forename: Ki-Joong
authors.initials: KJ
authors.lastname: Kim
authors.forename: Woon-Jo
authors.initials: WJ
authors.lastname: Jeong
authors.forename: Min-Chul
authors.initials: MC
authors.lastname: Chung
authors.forename: Sang-Chul
authors.initials: SC
authors.lastname: Jung
authors.forename: Sang-Chai
authors.initials: SC
authors.lastname: Kim
authors.forename: Ho-Geun
authors.initials: HG
authors.lastname: Ahn