Valorisation of corncob into furfuryl alcohol and furoic acid via chemoenzymatic cascade catalysis
Jiacheng Ni , Junhua Di , Cuiluan Ma , Yu-Cai He
Bioresources and Bioprocessing ›› 2021, Vol. 8 ›› Issue (1) : 113
Valorisation of corncob into furfuryl alcohol and furoic acid via chemoenzymatic cascade catalysis
Heterogeneous tin-based sulfonated graphite (Sn-GP) catalyst was prepared with graphite as carrier. The physicochemical properties of Sn-GP were captured by FT-IR, XRD, SEM and BET. Organic acids with different pKa values were used to assist Sn-GP for transforming corncob (CC), and a linear equation (Furfural yield = − 7.563 × pKa + 64.383) (R 2 = 0.9348) was fitted in acidic condition. Using sugarcane bagasse, reed leaf, chestnut shell, sunflower stalk and CC as feedstocks, co-catalysis of CC (75.0 g/L) with maleic acid (pKa = 1.92) (0.5 wt%) and Sn-GP (3.6 wt%) yielded the highest furfural yield (47.3%) for 0.5 h at 170 °C. An effective furfural synthesis was conducted via co-catalysis with Sn-GP and maleic acid. Subsequently, E. coli CG-19 and TS completely catalyzed the conversion of corncob-derived FAL to furfurylalcohol and furoic acid, respectively. Valorisation of available renewable biomass to furans was successfully developed in tandem chemoenzymatic reaction.
Furans / Sn-GP / Biomass / Co-catalysis / Chemoenzymatic catalysis
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