1-Butanol dehydration and oxidation over vanadium phosphate catalysts

Puzzo, F.; Capece, N.; Setti, L.; Pavarelli, G.; De Maron, J.; Tabanelli, T.; Cavani, F.

doi:10.1016/j.apcata.2023.119243

The transformation of 1-butanol into either butenes or maleic anhydride was carried out both with and without oxygen, using V/P/O catalysts. With vanadyl pyrophosphate prepared by coprecipitation, at temperature lower than 240 ◦C and without oxygen, selectivity to butenes was higher than 90%, but a slow deactivation took place. At temperature higher than 300 ◦C and in the presence of air, maleic and phthalic anhydrides were the prevailing products, with selectivity of 60% and 14%, respectively. Catalytic performance was affected by crystallinity and acidity. αI-VOPO4 showed a poor performance in the absence of air, with a quick deactivation due to coke accumulation; but it displayed an excellent selectivity to butenes (close to 98%) at temperatures lower than 320 ◦C in the presence of air, with stable performance. At temperature higher than 360 ◦C, α I-VOPO4 was reduced to vanadyl pyrophosphate and catalyzed the direct oxidation of 1-butanol into maleic anhydride, but with 35% selectivity

Puzzo F., Capece N., Setti L., Pavarelli G., De Maron J., Tabanelli T., et al. (2023). 1-Butanol dehydration and oxidation over vanadium phosphate catalysts. APPLIED CATALYSIS A: GENERAL, 661, 1-10 [10.1016/j.apcata.2023.119243].