Methanol steam reforming overCo-Cu-Zn/γ-Al2O3catalyst: Kinetic andRSM-BBDmodeling approaches

To develop kinetic model for methanol steam reforming, the experiment tests at various operating conditions (ie, temperature: 180 degrees C-500 degrees C, pressure: 1-11 bar and H2O/CH3OH ratio [S/M] of 0.75-3.75) on Co-Cu-Zn/gamma-Avnl(2)O(3)catalyst. The kinetic model development relied on Langmuir-Freundlich (LF) method. Also, three second-order model applied by using response surface methodology-box behnken design (RSM-BBD) approach to predict the various responses including methanol conversion, H(2)and CO yield. The deviation of kinetic model in predicting responses was 10.86% and showed good forecasting H(2)yield compared to other responses. However, RSM-BBD approach had a better ability in predicting the methanol conversion with error of 5.21% than products selectivity. The methanol conversion and CO yield were almost constant (equal zero) up to 260 degrees C. The methanol conversion of 100% reached close to 500 degrees C at pressures of 1 and 6 bar. An augmentation inS/Mled to enhance in methanol conversion and H(2)yield, while this trend for CO yield was reverse.