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A hybrid strategy for efficient valorization of bulrush into furoic acid in water–ChCl-based deep eutectic solvent by Dong Yang; Nana Zhao; Shuxin Tang; Xuan Zhu; Cuiluan Ma; Bo Fan; Jianguang Liang; Bingqi Yu; Linsong Yang; Yu-Cai He is a Engineering article available to read on EtoBox.

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Furoic acid, an important biobased furan chemical, was synthesized from available, inexpensive and renewable bulrushes (Phragmites communis) via chemoenzymatic route in aqueous media containing DES (deep eutectic solvent) as an additive. Organic carboxylic acid as HBD (hydrogen-bond-donor) was used to prepare ChCl-based DES for transforming bulrushes to furfural. By studying the relationship between pKa value of different organic acids in DESs and furfural yield, ChCl-based DES with citric acid (pKa = 3.13) as HBD could obtain higher furfural yield. ChCl:Citric acid (20.0 vol% dose) yielded furfural (75.5 mM) at 47.64% yield from AS-bulrush (NaOH-soaked bulrush) at 180 • C in 30 min. Characteristics of untreated and pretreated bulrushes were captured with XRD (X-ray diffraction), FT-IR (Fourier transform infrare spectra), and SEM (scanning electron microscope). AS-bulrush-valorized furfural was sequentially biotransformed into furoic acid with HMFOMUT (Recombinant E. coli HMFOMUT) whole-cells at 30 • C in ChCl:Citric acid-H 2 O (pH 7.0). The yield of furoic acid reached 42.51% after 56 h. This study developed an environmentally friendly strategy for chemoenzymatic cascade catalysis

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Author

Dong Yang; Nana Zhao; Shuxin Tang; Xuan Zhu; Cuiluan Ma; Bo Fan; Jianguang Liang; Bingqi Yu; Linsong Yang; Yu-Cai He

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)