Rheological characterization of dilute acid pretreated softwood.
(2011) In Biotechnology and Bioengineering 108(5). p.1031-1041- Abstract
- Large-scale bioethanol production from lignocellulosic biomass will require high solids loading in the enzymatic hydrolysis step. However, slurries of pretreated lignocelluloses are complex fluids due to the fibrous nature, especially at high concentrations of water insoluble solids (WIS). A prerequisite for dealing with transport issues and for developing efficient full-scale processes is a fundamental understanding of the flow properties of pretreated lignocellulose. A comprehensive rheological characterization of dilute acid pretreated spruce has been carried out in this study, accounting for the effects of WIS concentration, particle size distribution (PSD), and the degree of enzymatic hydrolysis. The rheology of pretreated spruce... (More)
- Large-scale bioethanol production from lignocellulosic biomass will require high solids loading in the enzymatic hydrolysis step. However, slurries of pretreated lignocelluloses are complex fluids due to the fibrous nature, especially at high concentrations of water insoluble solids (WIS). A prerequisite for dealing with transport issues and for developing efficient full-scale processes is a fundamental understanding of the flow properties of pretreated lignocellulose. A comprehensive rheological characterization of dilute acid pretreated spruce has been carried out in this study, accounting for the effects of WIS concentration, particle size distribution (PSD), and the degree of enzymatic hydrolysis. The rheology of pretreated spruce slurries was found to be strongly dependent on the WIS concentration. The storage modulus (G'(LVR)) and yield stress showed typical power-law dependencies on volume fraction and WIS content. Milling of the pretreated material resulted in significantly higher yield stress and viscosity, likely due to narrower PSD, which suggests that the strength of the network of the coarsest fibers determines the rheology of these materials to a large extent. During enzymatic hydrolysis, yield stress and viscosity decreased dramatically, partly due to decreasing WIS content, but possibly also due to changes in fiber properties such as the chemical composition. Biotechnol. Bioeng. © 2010 Wiley Periodicals, Inc. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1756808
- author
- Wiman, Magnus LU ; Palmqvist, Benny LU ; Tornberg, Eva LU and Lidén, Gunnar LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Biotechnology and Bioengineering
- volume
- 108
- issue
- 5
- pages
- 1031 - 1041
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:21449021
- wos:000288394300005
- scopus:79953158843
- pmid:21449021
- ISSN
- 1097-0290
- DOI
- 10.1002/bit.23020
- language
- English
- LU publication?
- yes
- id
- e34c4b16-f73f-41a8-9d93-4eada61170cd (old id 1756808)
- date added to LUP
- 2016-04-01 10:21:32
- date last changed
- 2023-11-09 18:50:47
@article{e34c4b16-f73f-41a8-9d93-4eada61170cd,
abstract = {{Large-scale bioethanol production from lignocellulosic biomass will require high solids loading in the enzymatic hydrolysis step. However, slurries of pretreated lignocelluloses are complex fluids due to the fibrous nature, especially at high concentrations of water insoluble solids (WIS). A prerequisite for dealing with transport issues and for developing efficient full-scale processes is a fundamental understanding of the flow properties of pretreated lignocellulose. A comprehensive rheological characterization of dilute acid pretreated spruce has been carried out in this study, accounting for the effects of WIS concentration, particle size distribution (PSD), and the degree of enzymatic hydrolysis. The rheology of pretreated spruce slurries was found to be strongly dependent on the WIS concentration. The storage modulus (G'(LVR)) and yield stress showed typical power-law dependencies on volume fraction and WIS content. Milling of the pretreated material resulted in significantly higher yield stress and viscosity, likely due to narrower PSD, which suggests that the strength of the network of the coarsest fibers determines the rheology of these materials to a large extent. During enzymatic hydrolysis, yield stress and viscosity decreased dramatically, partly due to decreasing WIS content, but possibly also due to changes in fiber properties such as the chemical composition. Biotechnol. Bioeng. © 2010 Wiley Periodicals, Inc.}},
author = {{Wiman, Magnus and Palmqvist, Benny and Tornberg, Eva and Lidén, Gunnar}},
issn = {{1097-0290}},
language = {{eng}},
number = {{5}},
pages = {{1031--1041}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Biotechnology and Bioengineering}},
title = {{Rheological characterization of dilute acid pretreated softwood.}},
url = {{http://dx.doi.org/10.1002/bit.23020}},
doi = {{10.1002/bit.23020}},
volume = {{108}},
year = {{2011}},
}