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

ENERGYO ◽  
2018 ◽  
Author(s):  
Fang Li ◽  
Hongfang Ma ◽  
Weiyong Ying
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Co Hydrogenation ◽  
Central Composite Rotatable Design ◽  
Modeling And Optimization ◽  
Central Composite ◽  
Ethanol Synthesis ◽  
Rotatable Design

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

2014 ◽  
Vol 12 (1) ◽  
pp. 245-255
Author(s):  
Fang Li ◽  
Hongfang Ma ◽  
Weiyong Ying
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Co Hydrogenation ◽  
Quadratic Model ◽  
Central Composite Rotatable Design ◽  
Co Conversion ◽  
Experimental Values ◽  
Central Composite ◽  
Ethanol Synthesis ◽  
Rotatable Design

Abstract 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/γ-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 R2 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.

scholarly journals Densification and volumetric change during supersolidus liquid phase sintering of prealloyed brass Cu28Zn powder: Modeling and optimization

2014 ◽  
Vol 46 (1) ◽  
pp. 23-35 ◽  
Author(s):  
A. Mohammadzadeh ◽  
M. Azadbeh ◽  
Sabahi Namini
Keyword(s):  
Response Surface Methodology ◽  
Liquid Phase ◽  
Response Surface ◽  
Three Dimensional ◽  
Liquid Phase Sintering ◽  
Central Composite Rotatable Design ◽  
Volumetric Change ◽  
Short Period ◽  
Central Composite ◽  
Rotatable Design

An investigation has been made to use response surface methodology and central composite rotatable design for modeling and optimizing the effect of sintering variables on densification of prealloyed Cu28Zn brass powder during supersolidus liquid phase sintering. The mathematical equations were derived to predict sintered density, densification parameter, porosity percentage and volumetric change of samples using second order regression analysis. As well as the adequacy of models was evaluated by analysis of variance technique at 95% confidence level. Finally, the influence and interaction of sintering variables, on achieving any desired properties was demonstrated graphically in contour and three dimensional plots. In order to better analyze the samples, microstructure evaluation was carried out. It was concluded that response surface methodology based on central composite rotatable design, is an economical way to obtain arbitrary information with performing the fewest number of experiments in a short period of time.

Sign in / Sign up

Export Citation Format

Share Document