Details

Autor(en) / Beteiligte

• Yang, Shuang
• Wang, Yuanyu
• Kang, Xiheng
• Yang, Xianpeng
• Zhang, Chenyuan
• Deng, Lulu
• Meng, Xianzhi
• Song, Xueping
• Wang, Lei

Titel

Effects of various acid catalysts in dimethyl isosorbide/water co-solvent system for lignocellulosic biomass pretreatment

Ist Teil von

• Industrial crops and products, 2023-11, Vol.203, p.117169, Article 117169

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Novel organosolv pretreatments of biomass using biobased green solvents have attracted increasing attention to realize sustainable biorefinery. We have demonstrated that the feasibility of dimethyl isosorbide/water co-solvent in fractionating lignocellulosic biomass (Eucalyptus) for multiple products under a mild condition (120 °C, 60 min). To take a further step towards revealing the effects of catalysts, we explored various Brønsted (e.g., H2SO4, HCl, and p-TsOH), Lewis acid catalysts (e.g., AlCl3 and FeCl3) and their combinations in this co-solvent system. An interesting finding was that the delignification efficiency of AlCl3 was lower than that of H2SO4 (69.9% vs 91.2%), while the cellulose conversion efficiency of the pretreated pulp was similar (∼80%). It is hypothesized that the presence of Al3+ could inhibit the binding of lignin to cellulase, which was supported by the quantum chemistry calculations. Results revealed the presence of cation− π interactions between Al3+ and lignin with interaction energy (ΔE) was 1022.04 kJ/mol and 1003.04 kJ/mol for S and G type of lignin, respectively. In addition, the pretreatment with H2SO4 -AlCl3 co-catalyst could achieve a high lignin removal efficiency of 93.0% and almost complete enzymatic hydrolysis of obtained cellulose pulp (∼100%). This research demonstrated that the co-catalyst strategy effectively improved the overall performance of the solvent-based biorefinery. •Revealed the effects of various acid catalysts in the DMI/H2O co-solvent system.•H2SO4-AlCl3 co-catalyst could achieve 93% lignin removal efficiency.•H2SO4-AlCl3 co-catalyst resulted in complete enzymatic hydrolysis of cellulose.•The interaction energies between Al3+ and lignin were quantified.