Hydrolysis of cellulose using heteropoly salts derivatives from H3PW12O40 with different redox properties as catalysts

Abstract

Heteropoly salts containing different numbers of vanadium atoms (K 4 [PVW 11 O 40 (HPW), and used as catalysts in hydrolysis of cellulose reactions in order to change the redox properties and verify whether the cluster of catalysts are involved in mechanism reaction. The hydrolysis reactions following a full 23 factorial design with the variables: mass ratio (catalyst/substrate), reaction time and temperature. The variables evaluated were significant at a 90% confidence level including second and third order interactions. According to the conducted experiments, the catalysts were all active in hydrolysis. The best results occurred when HPW was used suggesting that the redox properties did not have much influence in depolymerization of cellulose and the hydrolysis mechanism are assigned to acidic properties of the medium. The main products obtained from the reactions were glucose and HMF, which are products of great interest in the chemical industry.

Effect of Different Supported Heteropoly Acid on the Catalytic Hydrothermal Conversion of Cellulose into Formic Acid

“…The cellulose conversion and FA yield for the other three catalyst follow the order of PTA-HT (32 %, 7.35 %) > STA-HT (17 %, 2.87%) > Calcined HT (9%, 1.86 %), respectively. As referred to previous studies [3][21] [22][23], raw HPA was highly reactive for cellulose conversion and it was interesting to notice that heterogeneous HPA catalyst can play a key role in cellulose valorization process. STA-HT, on the other hand, has poor cellulose conversion and no FA yield.…”