Rubidium- and caesium-doped silicotungstic acid catalysts supported on alumina for the catalytic dehydration of glycerol to acrolein

► Caesium-doped silicotungstic acid catalysts, CsSTA/Al2O3, are selective for glycerol dehydration to acrolein. ► Catalysts are stable for up to 90-h time-on-stream without co-fed O2. ► Catalysts characterisation indicates that high acrolein yield can be correlated with an increased interaction of the active silicotungstic acid with the support.