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Erschienen in: Cellulose 18/2019

23.09.2019 | Original Research

Effects of alkaline hydrogen peroxide treatment on cellulose accessibility of switchgrass pretreated by acidic deep eutectic solvent

verfasst von: Zhu Chen, Yisheng Sun, Caixia Wan

Erschienen in: Cellulose | Ausgabe 18/2019

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Abstract

Choline chloride: lactic acid (ChCl:LA) is a promising green acidic deep eutectic solvent for biomass fractionation and lignin extraction. This study reported an efficient ChCl:LA pretreatment for delignification and xylan solubilization from biomass. Under a mild condition (30 min, 130 °C), 83.4% lignin and 80.4% xylan were selectively removed from switchgrass. The pretreated switchgrass was highly enriched with cellulose (71.4%), but showed slow release of sugar. Its enzymatic hydrolysis efficiency was much improved by alkaline hydrogen peroxide (AHP) post-treatment. Synergistic effects of AHP suggested that additional physical barrier to cellulose accessibility could be created through side reactions between LA and cellulose. After AHP post-treatment, cellulose became highly accessible and digestible, with 94.1% glucose yield even at a high solid loading (20%). ChCl:LA can be recycled and reused without conditioning although pretreatment effectiveness diminished gradually. Overall, an efficient ChCl:LA pretreatment was developed for biomass pretreatment, and possible interaction between LA and cellulose during the pretreatment can be decoupled by AHP post-treatment.

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Literatur
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Metadaten
Titel
Effects of alkaline hydrogen peroxide treatment on cellulose accessibility of switchgrass pretreated by acidic deep eutectic solvent
verfasst von
Zhu Chen
Yisheng Sun
Caixia Wan
Publikationsdatum
23.09.2019
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 18/2019
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-019-02759-5

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