Effect of Basic Promoters on Porous Supported Alumina Catalysts for Acetins Production

A facile strategy for the design of porous supports was obtained by modifying sol-gel method followed wet impregnation technique. In this respect, herein, acidity γ-Al2O3 phase modulated adding basic MgO, La2O3 or ZnO promoters to form binary supported catalysts. The Ni and Co dispersion on associated with their tunable morphologies resulted in highly alumina-based physicochemical properties solids were comprehensively investigated XRD, textural properties, Raman FTIR spectroscopy, SEM-EDS, TEM, EPR XPS analyses. catalytic performances esterification glycerol presence acetic acid (EG) acetins production evaluated. dispersed NiO Co3O4 active species produced synergistic effects appearing be reason activity EG reaction. Under optimized reaction conditions, NiCo/MgO-Al2O3 found a robust solid superior performance improved stability four cycles 65.0% conversion an exclusive selectivity 53% triacetin. Co2+/Co3+ Ni2+ strongly interacting spinel MgAl2O4 phases, latter having large number lattice oxygen species, considered another component besides those glycerol.