Gradient Concentration Control of Active Components on the Industrial Cs-P/γ-Al2O3Catalyst

For supported catalysts, it is particularly important to ensure the effective loading of the active component on the support. A new industrial Cs-P/γ-Al2O3catalyst with controllable distribution of active components was developed and applied to the aldol condensation reaction of methyl propionate and formaldehyde. The distribution of active components was controlled by adjusting the preparation conditions, especially the adsorption time, to form the catalyst with a gradient concentration of active components, which had been confirmed by the EMPA and SEM-EDS characterization. In addition, the kinetic equations including pseudo-first- and pseudo-second-order kinetic models as well as isotherm equations based on Freundlich and Langmuir models were used to describe the adsorption process to provide valuable process parameters for industrial production of catalysts.