Methanol steam reforming over <scp>Co‐Cu‐Zn</scp> / <scp> γ‐Al <sub>2</sub> O <sub>3</sub> </scp> catalyst: Kinetic and <scp>RSM‐BBD</scp> modeling approaches
Amir Mosayebi
Abstract
To develop kinetic model for methanol steam reforming, the experiment tests at various operating conditions (ie, temperature: 180°C-500°C, pressure: 1-11 bar and H2O/CH3OH ratio [S/M] of 0.75-3.75) on Co-Cu-Zn/γ-Avnl2O3 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, H2 and CO yield. The deviation of kinetic model in predicting responses was 10.86% and showed good forecasting H2 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°C. The methanol conversion of 100% reached close to 500°C at pressures of 1 and 6 bar. An augmentation in S/M led to enhance in methanol conversion and H2 yield, while this trend for CO yield was reverse.