Catalytic performance of LaCo0.5M0.5O3 (M = Mn, Cr, Fe, Ni, Cu) perovskite-type oxides and LaCo0.5Mn0.5O3 supported on cordierite for CO oxidation
Catalytic performance of LaCo0.5M0.5O3 (M = Mn, Cr, Fe, Ni, Cu) perovskite-type oxides and LaCo0.5Mn0.5O3 supported on cordierite for CO oxidation
Xiaokang Yan(Nanjing University of Technology); Shu-Bao Shen(Nanjing University of Technology); Qiong Huang(Nanjing University of Technology); Bing Li(Nanjing University of Technology); Xiaoliang Xu(Nanjing University of Technology); Ying-Wen Chen(Nanjing University of Technology); She-Min Zhu(Nanjing University of Technology)
19권 2호, 561~565쪽
초록
Catalytic combustion of CO over perovskite-type oxides LaCo0.5M0.5O3 (M = Mn, Cr, Fe, Ni, Cu) and LaCo0.5Mn0.5O3 supported on cordierite were investigated. The catalysts were synthesized by impregnation method with citrate and characterized by XRD, SEM and TPR. The LaCo0.5Mn0.5O3catalyst showed much higher activity in CO oxidation compared with LaCo0.5M0.5O3 (M = Cr, Fe, Ni, Cu)due to different kinds of valence state and lattice oxygen content. When LaCo0.5Mn0.5O3 was supported on cordierite, the activity was improved significantly. However, calcining temperature and the presence of water vapor affected the catalytic activity due to sintering and competition of H2O with CO for adsorption, respectively.
Abstract
Catalytic combustion of CO over perovskite-type oxides LaCo0.5M0.5O3 (M = Mn, Cr, Fe, Ni, Cu) and LaCo0.5Mn0.5O3 supported on cordierite were investigated. The catalysts were synthesized by impregnation method with citrate and characterized by XRD, SEM and TPR. The LaCo0.5Mn0.5O3catalyst showed much higher activity in CO oxidation compared with LaCo0.5M0.5O3 (M = Cr, Fe, Ni, Cu)due to different kinds of valence state and lattice oxygen content. When LaCo0.5Mn0.5O3 was supported on cordierite, the activity was improved significantly. However, calcining temperature and the presence of water vapor affected the catalytic activity due to sintering and competition of H2O with CO for adsorption, respectively.
- 발행기관:
- 한국공업화학회
- 분류:
- 화학공학