Abstract. The gas phase hydrogenation of acrolein over supported silver catalysts has been investigated with a focus on the influence of the support acidity. Acidity has been varied by preparing silver catalysts supported on silica/alumina supports with varying SiO2/Al2O3 ratio. After the catalytic experiments the Ag catalysts exhibit similar particle sizes, as revealed with TEM (transmissi…
Abstract. Different silica-, alumina-, and aluminosilicate-supported heteropolyacid catalysts were prepared using phosphomolybdic acid H3PMo12O40·xH2O, phosphotungstic acid H3PW12O40·xH2O, silicotungstic acid H4SiW12O40·xH2O, and ammonium phosphomolybdate (NH4)3PMo12O40·xH2O as precursor compounds. The as-synthesised solids were characterised by nitrogen adsorption, XRD, TG/DTA, Raman s…