Selective CO Oxidation in Rich Hydrogen by Ultra Fine Cu/Sn-doped ceria Catalysts

• Main Authors: Kun-Zhe Lin, 林昆哲
• Other Authors: JenShi B. Wang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/10476499254980523820

碩士 === 義守大學 === 化學工程學系暨生物技術與化學工程研究所 === 103 === Copper oxide impregnated on tin-doped ceria prepared by reverse microemulsion was used as catalysts for the selective CO oxidation in a rich hydrogen environment by GC-TCD.Therefore,reverse microemulsion method was adopted in this study to prepare ceria of different percentages of tin doping for the selective CO oxidation. Activity test results showed that the best activity performance was obtained by the catalyst of 10% tin-doped ceria, which displays a CO conversion of 45% at 60℃ and almost 95% at 90℃, while still achieving a high CO selectivity of almost 100% due to little hydrogen consumption. However, exceeding 100℃ hydrogen gradually reacts with oxygen resulting in a decrease in selectivity. In addition, from the competitive oxidation tests of CO and H2 at 120℃, it has been demonstrated that CO is more easily oxidized than H2. The catalysts studied in this work can exhibit high CO selectivity and low hydrogen consumption at low temperatures Activity results also match with those of TEM characterizations and BET surface area.