Co-catalysis of corncob with dilute formic acid plus solid acid SO42−/SnO2-montmorillonite under the microwave for enhancing the biosynthesis of furfuralcohol

Valorisation of corncob into furfuryl alcohol and furoic acid via chemoenzymatic cascade catalysis

“…In our study, corncob was converted into FAL (83.2 mM) at 47.3% yield by Sn-GP (3.6 wt%) and maleic acid (0.5 wt%) in water at 170 °C within 30 min. Although the FAL yield was not high, organic solvent was avoided, and the FAL preparation process from biomass was easier to perform compared to previous reporsts (Huang et al 2019 ; Peng et al 2019 ; Yang et al 2020 ).…”

“…It is known that toluene is highly toxic, and it should be avoided to be used. Co-catalysis of HCOOH (1.0 wt%) and SO 4 2− /SnO 2 -MMT (2.0 wt%) was used to catalyze corncob into FAL (77.8 mM) in the yield of 40.2% at 180 °C within 10 min under microwave (600 W) (Huang et al 2019 ). However, high energy consumption was required.…”

“… Reaction media Ref. Bamboo shoot shell (BSS) Sn–adamellite 170 °C, 30 min 57.5% (70.2 mM) H 2 O, pH 1.0 Yang et al ( 2020 ) Alkali-treated dewaxed rice straw Sn–sepiolite 170 °C, 20 min 42.2% (97.8 mM) H 2 O, pH 1.0 Xue et al ( 2018 ) D -Xylose SO 4 2− /SnO 2 -argil 180 °C, 20 min 50.8% (107.6 mM) H 2 O, oxalic acid (0.35 wt%) He et al ( 2017b ) Corncob-derived D -xylose SO 4 2− /SnO 2 –kaoline 170 °C, 30 min 74.3% (67.3 mM) H 2 O–toluene (1:2, v:v), OP-10 10 mM Huang et al ( 2019 ) Corncob SO 4 2− /SnO 2 -MMT 180 °C, 10 min 40.2% (77.8 mM) H 2 O–HCOOH (1.0 wt%), Microwave (600 W) Zhang et al ( 2020c ) Corncob Sn-BTN 170 °C, 30 min 53.3% (103.4 mM) MIBK-H 2 O (1:1), pH 1.0 Peng et al ( 2019 ) Corncob Sn-GP 170 °C, 30 min 47.3% (83.2 mM) H 2 O, maleic acid (0.5 wt%) This study …”

Efficient Synthesis of Biobased Furoic Acid from Corncob via Chemoenzymatic Approach

“…Various homogeneous and heterogeneous catalysts have been utilized for the valorization of lignocellulosic biomass into furfural [5][6][7]. Widely utilized heterogeneous chemocatalysts, including heteropolyacids, niobium-oxide, H-SAPO-34, MCM-41, zeolites, sulfonated montmorillonite, sulfonated kaolin, sulfonated perlite, and so on [3,4,[8][9][10][11][12], exhibit excellent catalytic activity for catalyzing biomass, xylan, or xylose into furfural than homogeneous chemocatalysts and are easier to recover [13][14][15].…”