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Effects of bulk and surface defects of TiO[subscript 2] support on the physico-chemical properties of Co/TiO[subscript 2] catalyst VIA methanation |
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| รหัสดีโอไอ | |
| Title | Effects of bulk and surface defects of TiO[subscript 2] support on the physico-chemical properties of Co/TiO[subscript 2] catalyst VIA methanation |
| Creator | Supawan Supawanitchmongkol |
| Contributor | Bunjerd Jongsomjit |
| Publisher | Chulalongkorn University |
| Publication Year | 2550 |
| Keyword | Titanium dioxide, Methanation, Cobalt catalysts |
| Abstract | In this work, the effects of bulk and surface defects on TiO[subscript 2] upports prepared by the sol-gel method were investigated over Co/TiO[subscript 2] catalyst. The 20%wt of cobalt were impregnated onto TiO[subscript 2] having different amounts of bulk and surface defects, which were prepared from the sol-gel method by controlling the water: alkoxide molar ratios during sol-gel synthesis. The Co/TiO[subscript 2] catalysts were characterized with different techniques including XRD, N[subscript 2]-physisorption, SEM, TEM, H[subscript 2]-chemisorption, temperature-programmed reduction (TPR). It showed that the optimum amount of bulk and surface defects can result in high total H[subscript 2] chemisorption, high reducibility, low reduction temperature, and consequently high conversion for methanation of the Co/TiO[subscript 2] catalyst. This was attributed to changes in the SMSI property superimposed with the interaction between cobalt and TiO[subscript 2] support caused by impregnate cobalt onto different bulk and surface defects on TiO[subscript 2]. |
| URL Website | cuir.car.chula.ac.th |
