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Breakdown of Cell Wall Nanostructure in Dilute Acid Pretreated Biomass
Abstract
The generation of bioethanol from lignocellulosic biomass holds great promise for renewable and clean energy production. A better understanding of the complex mechanisms of lignocellulose breakdown during various pretreatment methods is needed to realize this potential in a cost and energy efficient way. Here we use small-angle neutron scattering (SANS) to characterize morphological changes in switchgrass lignocellulose across molecular to submicrometer length scales resulting from the industrially relevant dilute acid pretreatment method. Our results demonstrate that dilute acid pretreatment increases the cross-sectional radius of the crystalline cellulose fibril. This change is accompanied by removal of hemicellulose and the formation of R(g) ∼ 135 A lignin aggregates. The structural signature of smooth cell wall surfaces is observed at length scales larger than 1000 A, and it remains remarkably invariable during pretreatment. This study elucidates the interplay of the different biomolecular components in the breakdown process of switchgrass by dilute acid pretreatment. The results are important for the development of efficient strategies of biomass to biofuel conversion.
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Citations
Cited by
Deconstruction of Lignocellulosic Biomass to Fuels and Chemicals
Chundawat, S. P. S., Beckham, G. T., Himmel, M. E., & Dale, B. E. (2011) · Annual Review of Chemical and Biomolecular Engineering · doi:10.1146/annurev-chembioeng-061010-114205 · Cited by 1,017
Pretreatment and Lignocellulosic Chemistry
Hu, F., & Ragauskas, A. (2012) · BioEnergy Research · doi:10.1007/s12155-012-9208-0 · Cited by 462
Self-citationSingh, J., Suhag, M., & Dhaka, A. (2015) · Carbohydrate Polymers · doi:10.1016/j.carbpol.2014.10.012 · Cited by 462
Pseudo-lignin formation and its impact on enzymatic hydrolysis
Hu, F., Jung, S., & Ragauskas, A. (2012) · Bioresource Technology · doi:10.1016/j.biortech.2012.04.037 · Cited by 409
Self-citationKo, J. K., Kim, Y., Ximenes, E., & Ladisch, M. R. (2015) · Biotechnology and Bioengineering · doi:10.1002/bit.25349 · Cited by 357
Metadata
- Authors
- Pingali, S. V., Urban, V. S., Heller, W. T., McGaughey, J., O’Neill, H., Foston, M., Myles, D. A., Ragauskas, A., & Evans, B. R.
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-08-20
- Volume
- 11
- Issue
- 9
- Pages
- 2329-2335
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2024787583
- Cited by
- 167
- References
- 0
- FWCI
- 8.92
- Type
- journal article
- Language
- en
- Open access
- closed
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- Pingali, S. V., Urban, V. S., Heller, W. T., McGaughey, J., O’Neill, H., Foston, M., Myles, D. A., Ragauskas, A., & Evans, B. R. (2010). Breakdown of Cell Wall Nanostructure in Dilute Acid Pretreated Biomass. Biomacromolecules. https://doi.org/10.1021/bm100455h
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