Base activation of persulfate: an effective pretreatment method to enhance glucose production from lignocellulosic biomass

Pretreatment is a necessary process in biorefineries to overcome recalcitrance of biomass and enhance its conversion efficiency for further transformation. NaOH activation of Na 2 S 2 O 8 , which merges alkaline pretreatment and advanced oxidation processes (AOPs) into one process, was performed at...

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Veröffentlicht in:Cellulose (London) 2021-05, Vol.28 (7), p.4039-4051
Hauptverfasser: Yang, Jirui, Wang, Xiaoqi, Shen, Feng, Qi, Xinhua
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creator Yang, Jirui
Wang, Xiaoqi
Shen, Feng
Qi, Xinhua
description Pretreatment is a necessary process in biorefineries to overcome recalcitrance of biomass and enhance its conversion efficiency for further transformation. NaOH activation of Na 2 S 2 O 8 , which merges alkaline pretreatment and advanced oxidation processes (AOPs) into one process, was performed at room temperature (25 °C) within a short duration (60 min). High concentration of NaOH plays a critically important role in NaOH–Na 2 S 2 O 8 pretreatment, which not only selectively removed hemicellulose in the lignocellulosic feedstock, but also activated Na 2 S 2 O 8 to produce strong oxidative radicals, leading to disruption of lignin matrix. The surface area and porosity for the pretreated feedstock were significantly increased compared with those of the pristine counterpart. After pretreatment by 5.12 M NaOH and 0.85 M Na 2 S 2 O 8 , the maximum glucose yield of the feedstock was increased by 47.4% compared with that of pristine counterpart (60.3% vs. 40.9%). This study provides an effective and easily-realizable pretreatment method for the utilization of lignocellulosic biomass. Graphic abstract
doi_str_mv 10.1007/s10570-021-03796-9
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NaOH activation of Na 2 S 2 O 8 , which merges alkaline pretreatment and advanced oxidation processes (AOPs) into one process, was performed at room temperature (25 °C) within a short duration (60 min). High concentration of NaOH plays a critically important role in NaOH–Na 2 S 2 O 8 pretreatment, which not only selectively removed hemicellulose in the lignocellulosic feedstock, but also activated Na 2 S 2 O 8 to produce strong oxidative radicals, leading to disruption of lignin matrix. The surface area and porosity for the pretreated feedstock were significantly increased compared with those of the pristine counterpart. After pretreatment by 5.12 M NaOH and 0.85 M Na 2 S 2 O 8 , the maximum glucose yield of the feedstock was increased by 47.4% compared with that of pristine counterpart (60.3% vs. 40.9%). This study provides an effective and easily-realizable pretreatment method for the utilization of lignocellulosic biomass. 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subjects Biomass
Bioorganic Chemistry
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Glass
Glucose
Lignocellulose
Natural Materials
Organic Chemistry
Original Research
Oxidation
Physical Chemistry
Polymer Sciences
Pretreatment
Raw materials
Room temperature
Sodium persulfate
Sustainable Development
title Base activation of persulfate: an effective pretreatment method to enhance glucose production from lignocellulosic biomass
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