V_2O_5 catalyst for synthesis of isobutyraldehyde from methanol and ethanol

The synthesis of isobutyraldehyde from methanol and ethanol was investigated over vanadium catalysts at 375 ℃ and under normal atmospheric pressure.The influence of V2O5 content and preparation conditions of catalysts on catalytic performances was studied.The results showed that 75% V2O5 content,480 ℃ calcination temperature and 2 h calcination time were the optimum conditions,and the ethanol conversion and isobutyraldehyde selectivity reached to 98.03% and 47.52% respectively.The fresh,reacted and regenerated catalysts were investigated by XRD and the reacted catalyst was also tested by DTA-TG to establish change of vanadium oxide.The results showed that V2O5 was reduced to V2O3 during reaction and deactivated catalyst could be regenerated.