Green process prorogue by xylanase enzyme and cellulose-derived sulfonated graphene oxide-like reinforcement in xylose and furfural production from corncob biomass

Ninh Thi Tinh, Le Minh Bao, Dang Duc Nhan, Pham Phi Bao, Tat Minh Hoang, Nguyen Thanh Hoai Nam, Nguyen Minh Dat, Nguyen Nhat Khoa, Nguyen Thi Hanh, Quach Thi Thanh Huong, Tong Thanh Danh and Huu Hieu Nguyen

Renewable Energy, 2024, vol. 232, issue C

Abstract: In this study, a process following the principles of green chemistry was applied for effective agricultural by-product conversion into biochemicals. Corncob was synergistically pretreated with a mixture of hydrogen peroxide:glacial acetic acid (1:2:2 wt/v/v) which was denoted as C-HPAC and then xylanase enzyme-assisted hydrolysis to obtain the highest xylose content of 1.99g with 66.41 % separation efficiency at 50 °C for 15h, and xylanase enzyme content of 0.4g/3g C-HPAC. Otherwise, the sulfonated graphene oxide-like structural material (EC-SGO) was synthesized through the sulfonation method using various concentrations of H2SO4 agent with EC-GO that was calcined with the mixture of ferrocene and cellulose (1:1 wt/wt) at 300 °C for 30 min. The highest furfural yield was 76.63 ± 2.23 % under the conditions of 60 mg EC-SGO catalyst, xylose concentration of 3 g/L, and NaCl 0.05 mol/L, at 180 °C in 60 min. Hence, the synergistic effect of NaCl and Brønsted acid sites (−SO3H) was confirmed through the XPS spectrum with an acid content of 0.6895 mmol/gcatalyst and depicted simultaneously a vital role through the proposal mechanism of converting xylose to furfural. The synthesized catalyst retains its stability for the multiple cycles of furfural production. Furthermore, this work has provided a route for the fractional separation of xylose and cellulose with assisted-enzymatic.

Keywords: Corncob; Xylanase enzyme; Sulfonated graphene oxide-like; Furfural (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:232:y:2024:i:c:s0960148124011078

DOI: 10.1016/j.renene.2024.121039

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