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.

Automated summary

The study explored the reaction mechanism of methanol steam reforming through experiments and kinetic model development, identifying the influencing factors under various operating conditions. Mathematical modeling and response surface methodology were used to predict methanol conversion, hydrogen, and carbon monoxide yields, revealing the impact of different factors on reaction products.