Optimization and statistical analysis of Au-ZnO/Al_2O_3 catalyst for CO oxidation

• 作 者: Wenjin Yan Xinli Jia Tao Chen Yanhui Yang
• 机 构: School of Chemical and Biomedical Engineering,Nanyang Technological University,Institute of Chemical
• 出 处: Journal of Energy Chemistry
• 发表日期: 2013年03期
• 关键词: calcination reactivity heterogeneous verified details terminated handle heating

In our former work[Catal.Today 174(2011) 127],12 heterogeneous catalysts were screened for CO oxidation,and Au-ZnO/Al_2O_3 was chosen and optimized in terms of weight loadings of Au and ZnO.The present study follows on to consider the impact of process parameters (catalyst preparation and reaction conditions),in conjunction with catalyst composition(weight loadings of Au and ZnO,and the total weight of the catalyst),as the optimization of the process parameters simultaneously optimized the catalyst composition.The optimization target is the reactivity of this important reaction.These factors were first optimized using response surface methodology(RSM) with 25 experiments,to obtain the optimum:100 mg of 1.0%Au-4.1%ZnO/Al_2O_3 catalyst with 220℃calcination and 100℃reduction.After optimization,the main effects and interactions of these five factors were studied using statistical sensitivity analysis(SA).Certain observations from S A were verified by reaction mechanism,reactivity test and/or characterization techniques,while others need further investigation.

In our former work [Catal. Today 174 (2011) 127], 12 heterogeneous catalysts were screened for CO oxidation, and Au-ZnO / Al 2 O 3 was chosen and optimized in terms of weight loadings of Au and ZnO. The present study follows on to consider the impact of process parameters (catalyst preparation and reaction conditions), in conjunction with catalyst composition (weight loadings of Au and ZnO, and the total weight of the catalyst), as the optimization of the process parameters when optimized catalyst composition. optimization target is the reactivity of this important reaction. These factors were first optimized using this response surface methodology (RSM) with 25 experiments, to obtain the optimum: 100 mg of 1.0% Au-4.1% ZnO / Al 2 O 3 catalyst with 220 ° C. calcination and 100 ℃ reduction. After optimization, the main effects and interactions of these five factors were studied using statistical sensitivity analysis (SA) .Certain observations from SA were verified by reaction mechanism, reactivity test and / or characterization techniques, while others need further investigation.