Topochemical Understanding of Lignin Distribution During Hydrothermal Flowthrough Pretreatment. Issue 32 (27th August 2018)

• Record Type: Journal Article
• Authors: Jung, Seokwon; Trajano, Heather L.; Yoo, Chang Geun; Foston, Marcus B.; Hu, Fan; Tolbert, Allison K.; Wyman, Charles E.; Ragauskas, Arthur J.
• Is Part Of: ChemistrySelect. Volume 3:Issue 32(2018)
• Page Start: 9348
• Page End: 9352
• Publication Date: 2018-08-27
• Subjects: Flowthrough pretreatment -- Surface characteristics -- ToF-SIMS -- Topochemical effect; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201801837
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Changes in surface properties during biomass pretreatments are important parameters to understand and engineer biological biomass conversion processes. In particular, different influences on the surface of biomass are expected between flowthrough and batch pretreatments. For a better understanding of biomass surface changes by hydrothermal flowthrough pretreatment, the mechanism by which the surface of biomass is altered in terms of cellulose and lignin was investigated using time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and compared with the bulk chemical composition and the results from scanning electron microscope (SEM). ToF‐SIMS analysis results provide semi‐quantitative information of cellulose and lignin and support the other observation from SEM and bulk compositional analyses. In brief, more lignin was observed on the surface of biomass at the early stage hydrothermal pretreatment, while the lignin mainly located at the cell corners was reduced by extended pretreatment time. Unlike batch pretreatment, pseudo‐lignin formation was not observed on the poplar surface during the flowthrough process. Abstract : Distribution of lignin on the surface of poplar during hydrothermal flowthrough pretreatment was investigated using surface characterization methods. More lignin was observed on the surface of biomass at the early stage, while the lignin at the cell corners decreased by extended pretreatment time. Pseudo‐lignin formation was not observed on the surface during the flowthrough process.