One-pot co-catalysis of corncob with dilute hydrochloric acid and tin-based solid acid for the enhancement of furfural production. (November 2018)

• Record Type: Journal Article
• Authors: Jiang, Chun-Xia; Di, Jun-Hua; Su, Chun; Yang, Si-Yu; Ma, Cui-Luan; He, Yu-Cai
• Is Part Of: Bioresource technology. Volume 268(2018)
• Page Start: 315
• Page End: 322
• Publication Date: 2018-11
• Subjects: Furfural -- Corncob -- SO42−/SnO2-diatomite -- Co-catalysis -- γ-Valerolactone; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.07.147
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Furfural was synthesized via co-catalysis of corncob with HCl plus SO4 2− /SnO2 -DTM. The relationship between pKa of acid and TOF of co-catalysis was explored. γ-GVL–water (6:4, v/v) biphasic system was built for furfural production. High furfural yield (68.9%) from corncob was achieved under the optimum condition. An effective catalyst recycling was demonstrated. Abstract: A newly synthesized solid acid catalyst SO4 2− /SnO2 -diatomite was prepared for synthesizing furfural from corncob in the presence of homogeneous Brönsted acid. The relationship between pKa of Brönsted acid and turnover frequency (TOF) of co-catalysis with Brönsted acid plus SO4 2− /SnO2 -diatomite was explored on the conversion of corncob to furfural. HCl (pKa = −7.0) (0.5 wt%) plus SO4 2− /SnO2 -diatomite (3.6 wt%) gave the highest furfural yield (40.1%) with TOF value at 2.98 h −1 in the aqueous media. In the γ-valerolactone–water (6:4, v:v) biphasic media containing 15 g/L ZnCl2, one-pot conversion of corncob with co-catalysts gave a furfural yield of 68.9% at 170 °C for 30 min. Additionally, an efficient SO4 2− /SnO2 -diatomite recycling was achieved with a productivity of 15.6 g furfural/(g solid acid·day) after 5 cycles of repeated use. Clearly, this one-pot co-catalysis process has high potential application for furfural production in future.