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01-04-2014 | Original Paper

Morphological changes in the cellulose and lignin components of biomass occur at different stages during steam pretreatment

Authors: Sai Venkatesh Pingali, Hugh M. O’Neill, Yoshiharu Nishiyama, Lilin He, Yuri B. Melnichenko, Volker Urban, Loukas Petridis, Brian Davison, Paul Langan

Published in: Cellulose | Issue 2/2014

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Abstract

Morphological changes to the different components of lignocellulosic biomass were observed as they occurred during steam pretreatment by placing a pressure reaction cell in a neutron beam and collecting time-resolved neutron scattering data. Changes to cellulose morphology occurred mainly in the heating phase, whereas changes in lignin morphology occurred mainly in the holding and cooling phases. During the heating stage, water is irreversibly expelled from cellulose microfibrils as the elementary fibrils coalesce. During the holding phase lignin aggregates begin to appear and they increase in size most noticeably during the cooling phase. This experiment demonstrates the unique information that in situ small angle neutron scattering studies of pretreatment can provide. This approach could be useful in optimizing the heating, holding and cooling stages of pretreatments to allow the exact size and nature of lignin aggregates to be controlled in order to enhance enzyme accessibility to cellulose and therefore the efficiency of biomass conversion.

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Title: Morphological changes in the cellulose and lignin components of biomass occur at different stages during steam pretreatment
Authors: Sai Venkatesh Pingali
Hugh M. O’Neill
Yoshiharu Nishiyama
Lilin He
Yuri B. Melnichenko
Volker Urban
Loukas Petridis
Brian Davison
Paul Langan
Publication date: 01-04-2014
Publisher: Springer Netherlands
Published in: Cellulose / Issue 2/2014
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-013-0162-6

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