Applying a face-centered central composite design to optimize the preferential CO oxidation over a PtAu/CeO₂-ZnO catalyst

详细信息	查看全文 | 推荐本文 |

• 作者：Sangobtip Pongstabodee^a ; ^c ; ^{sangobtip@gmail.com} ; ^{sangobtip.p@chula.ac.th} ; Sutarawadee Monyanon^a ; Apanee Luengnaruemitchai^b ; ^c
• 关键词：H2O and CO2 content ; Preferential oxidation of CO ; Statistical design of experiment ; Face-centered central composite design
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：March, 2012
• 卷：37
• 期：6
• 页码：4749-4761
• 文件大小：1008 K

摘要

The catalytic performance for the preferential oxidation of CO over a 1%(w/w) PtAu/CeO₂-ZnO catalyst prepared by co-precipitation was investigated using a full 2^k factorial design with three central points and a 95%confidence interval, in order to screen for the importance of the operating temperature (掳C) and the H₂O and CO₂ contents (%) in the simulated reformate gas on the CO conversion and selectivity. The catalyst was characterized by TEM, BET, XRD and FTIR. The temperature and CO₂ content had a significant influence on the conversion, whilst the selectivity depended on the temperature only. A face-centered central composite design was then used to evaluate the optimal conditions by simultaneously considering the maximal conversion, selectivity and constraints of the composition of realistic reformate gas. The difference in the estimated response and the experimental one was within 卤2%and 卤3%for routing simulated and realistic reformate gases, respectively.