Application of Response Surface Methodology and Central Composite Rotatable Design for Modeling and Optimization of Catalyst Compositions in Ethanol Synthesis via CO Hydrogenation

作者：Li, Fang; Ma, Hongfang; Ying, Weiyong^*

来源：International Journal of Chemical Reactor Engineering, 2014, 12(1): 245-255.

DOI：10.1515/ijcre-2013-0156

• central composite rotatable design
• response surface methodology
• CO hydrogenation
• ethanol

A statistical analysis about the effect of catalyst compositions on ethanol synthesis from CO hydrogenation was studied. The effect of Rh loading (0-3 wt.%), Fe loading (2-10 wt.%) and Mn loading (0.5-2.5 wt.%) of RhMnFe/gamma-Al2O3 was studied through response surface methodology (RSM) combined with a central composite rotatable design (CCRD). A linear and a quadratic model were proposed to correlate the three variables to the two responses: CO conversion and ethanol selectivity. The predicted values for ethanol selectivity were in a good agreement with the experimental values, with R-2 of 0.9779. The optimum conditions for achieving the maximum ethanol selectivity (27.8%) while limiting CO conversion at a moderate level (>20%) were as follows: Rh loading of 2.5 wt.%, Mn loading of 2.5 wt.% and Fe loading of 4 wt.%. Two representing catalysts were characterized by XRD, TPR and DRIFTS.

• 出版日期2014-3-21
• 单位华东理工大学