Catalytic performance on CuO-Cr2O3-Ga2O3 mixed oxides for water gas shift reaction: Effects of Ga/Cr molar ratio
- Catalytic performance on CuO-Cr2O3-Ga2O3 mixed oxides for water gas shift reaction: Effects of Ga/Cr molar ratio
- 김아롱; 이발상; 박명준; 문동주; 배종욱
- WGS; CuO-Cr2O3-Ga2O3; Surface area of copper; Ga/Cr molar ratio; Copper crystallite size
- Issue Date
- Catalysis communications
- VOL 19, 66-69
- Water gas shift (WGS) reaction was carried out on the coprecipitated CuO–Cr2O3–Ga2O3 mixed oxides to
elucidate the effects of Ga2O3 species to catalytic performances. WGS catalysts are prepared at a fixed molar
ratio of Cu/(Cr+Ga) at 1.0/0.1 by varying Ga/Cr molar ratio from 0 to 4. The catalytic activities on CuO–Cr2O3–
Ga2O3 are found to be in the shape of volcano curve in terms of Ga/Cr molar ratio and the highest activity was
observed on the catalyst having equimolar ratio of Ga/Cr in all tested temperature ranges of 160–280 °C. The
observed activities are strongly related with the metallic surface area of copper crystallites, and the high surface
area of metallic copper could be obtained by controlling the formation rate of copper–chromium nuclei at an
optimum Ga/Cr molar ratio on CuO–Cr2O3–Ga2O3 mixed oxides.
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