Selective gas-phase conversion of maleic anhydride to propionic acid on Pt-based catalysts

SILVINA A. REGENHARDT; A.F. TRASARTI; MEYER, CAMILO; GARETTO, TERESITA; MARCHI, ALBERTO

CATALYSIS COMMUNICATIONS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2013 vol. 35 p. 59 - 63

1566-7367

Pt-based catalysts, supported on Al2O3, SiO2 and SiO2-Al2O3, were prepared by incipient wetness impregnation and tested in the gas phase hydrogenation of maleic anhydride at atmospheric pressure and 240ºC. In these conditions, the hydrogenolytic activity pattern was: Pt/SiO2 > Pt/Al2O3 > Pt/SiO2-Al2O3, which is just the opposite of the support acidity trend. These metal Pt-based catalysts showed high selectivity to propionic acid, which was always higher than 80%. The selectivity pattern to this product was: Pt/Al2O3 > Pt/SiO2 > Pt/SiO2-Al2O3. Both activity and selectivity patterns may be explained on the basis of metal-support interaction and support acidity.