| 초록 |
Platinum catalysts have been commonly used for HI decomposition. In previous paper, effect of support in HI decomposition using Pt catalyst were reported and Al2O3 was the best support to get good characteristic. In this study, the deactivation phenomenon of Pt/Al2O3 catalyst and reasons of this catalysts deactivation were investigated. The initial maximum conversions of Pt(0.5)/Al2O3, was 18.72%. About 7h later, the conversion using Pt(0.5)/Al2O3 catalyst reached on a stead state. As a result, the reasons of Pt catalysts deactivation were explored that 1) Transforming Pt from active to inactive because of fouling I2 on catalyst not only active site but also supports and 2) Sintering of Pt during HI decomposition. Catalyst was prepared by impregnation method and activity tests were carried out with fixed-bed reactor. In addition, analysis methods such as BET, CO gas chemisorption, CO-chemisorption, XRD, TEM, and TG were used for the characteristic of the catalysts. |
