Condensed lignin structures and re-localization achieved at high severities in autohydrolysis ofEucalyptus globuluswood and their relationship with cellulose accessibility

2015 ◽  
Vol 112 (9) ◽  
pp. 1783-1791 ◽  
Author(s):  
Fabio Araya ◽  
Eduardo Troncoso ◽  
Regis Teixeira Mendonça ◽  
Juanita Freer
Keyword(s):  
Cellulose Accessibility ◽  
Condensed Lignin

scholarly journals Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility

Biomolecules ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 507
Author(s):  
Eduardo Troncoso-Ortega ◽  
Rosario del P. Castillo ◽  
Pablo Reyes-Contreras ◽  
Patricia Castaño-Rivera ◽  
Regis Teixeira Mendonça ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Eucalyptus Globulus ◽  
Steam Explosion ◽  
Laser Scanning ◽  
Structural Changes ◽  
Micro Particles ◽  
Cellulose Accessibility ◽  
Ft Ir ◽  
Enzymatic Accessibility ◽  
Physical And Chemical

The objective of this study was to investigate structural changes and lignin redistribution in Eucalyptus globulus pre-treated by steam explosion under different degrees of severity (S0), in order to evaluate their effect on cellulose accessibility by enzymatic hydrolysis. Approximately 87.7% to 98.5% of original glucans were retained in the pre-treated material. Glucose yields after the enzymatic hydrolysis of pre-treated material improved from 19.4% to 85.1% when S0 was increased from 8.53 to 10.42. One of the main reasons for the increase in glucose yield was the redistribution of lignin as micro-particles were deposited on the surface and interior of the fibre cell wall. This information was confirmed by laser scanning confocal fluorescence and FT-IR imaging; these microscopic techniques show changes in the physical and chemical characteristics of pre-treated fibres. In addition, the results allowed the construction of an explanatory model for microscale understanding of the enzymatic accessibility mechanism in the pre-treated lignocellulose.

scholarly journals Conversion of Lignocellulosic Biomass to Nanocellulose: Structure and Chemical Process

2014 ◽  
Vol 2014 ◽  
pp. 1-20 ◽  
Author(s):  
H. V. Lee ◽  
S. B. A. Hamid ◽  
S. K. Zain
Keyword(s):  
Molecular Structure ◽  
Mechanical Properties ◽  
Lignocellulosic Biomass ◽  
Chemical Process ◽  
Catalyst Design ◽  
Natural Resistance ◽  
Cellulose Crystallinity ◽  
Biomass Recalcitrance ◽  
Cellulose Accessibility ◽  
High Cellulose

Lignocellulosic biomass is a complex biopolymer that is primary composed of cellulose, hemicellulose, and lignin. The presence of cellulose in biomass is able to depolymerise into nanodimension biomaterial, with exceptional mechanical properties for biocomposites, pharmaceutical carriers, and electronic substrate’s application. However, the entangled biomass ultrastructure consists of inherent properties, such as strong lignin layers, low cellulose accessibility to chemicals, and high cellulose crystallinity, which inhibit the digestibility of the biomass for cellulose extraction. This situation offers both challenges and promises for the biomass biorefinery development to utilize the cellulose from lignocellulosic biomass. Thus, multistep biorefinery processes are necessary to ensure the deconstruction of noncellulosic content in lignocellulosic biomass, while maintaining cellulose product for further hydrolysis into nanocellulose material. In this review, we discuss the molecular structure basis for biomass recalcitrance, reengineering process of lignocellulosic biomass into nanocellulose via chemical, and novel catalytic approaches. Furthermore, review on catalyst design to overcome key barriers regarding the natural resistance of biomass will be presented herein.

scholarly journals Cellulase digestibility of pretreated biomass is limited by cellulose accessibility

2007 ◽  
Vol 98 (1) ◽  
pp. 112-122 ◽  
Author(s):  
Tina Jeoh ◽  
Claudia I. Ishizawa ◽  
Mark F. Davis ◽  
Michael E. Himmel ◽  
William S. Adney ◽  
...  
Keyword(s):  
Cellulose Accessibility ◽  
Pretreated Biomass

scholarly journals Cellulose Accessibility and Zeta potentials of Sugarcane Bagasse Pretreated by Green Liquor and Ethanol for High Hydrolysis Efficiency

BioResources ◽  
2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Wenwen Xue ◽  
Fuhou Lei ◽  
Pengfei Li ◽  
Jianxin Jiang
Keyword(s):  
Sugarcane Bagasse ◽  
Green Liquor ◽  
Zeta Potentials ◽  
Cellulose Accessibility

Cellulose accessibility determines the rate of enzymatic hydrolysis of steam-pretreated spruce

2012 ◽  
Vol 126 ◽  
pp. 208-215 ◽  
Author(s):  
Magnus Wiman ◽  
Dora Dienes ◽  
Mads A.T. Hansen ◽  
Torbjörn van der Meulen ◽  
Guido Zacchi ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Cellulose Accessibility ◽  
Hydrolysis Of

Altered carbon assimilation and cellulose accessibility to maximize bioethanol yield under low-cost biomass processing in corn brittle stalk

2019 ◽  
Vol 21 (16) ◽  
pp. 4388-4399 ◽  
Author(s):  
Leiming Wu ◽  
Shengqiu Feng ◽  
Jun Deng ◽  
Bin Yu ◽  
Youmei Wang ◽  
...  
Keyword(s):  
Low Cost ◽  
Carbon Assimilation ◽  
Cellulose Accessibility ◽  
Biomass Processing ◽  
Bioethanol Yield

Altered carbon assimilation and cellulose accessibility to maximize bioethanol yield under low-cost biomass processing in corn brittle stalk.

Minor Biomass Particle Size for an Efficient Cellulose Accessibility and Enzymatic Hydrolysis

2020 ◽  
Vol 5 (25) ◽  
pp. 7627-7631
Author(s):  
Érika S. Fernandes ◽  
Danilo Bueno ◽  
Fernando C. Pagnocca ◽  
Michel Brienzo
Keyword(s):  
Particle Size ◽  
Enzymatic Hydrolysis ◽  
Cellulose Accessibility ◽  
Biomass Particle Size

scholarly journals Real-time imaging reveals that lytic polysaccharide monooxygenase promotes cellulase activity by increasing cellulose accessibility

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Bo Song ◽  
Bingyao Li ◽  
Xiaoyan Wang ◽  
Wei Shen ◽  
Sungjin Park ◽  
...  
Keyword(s):  
Real Time ◽  
Cellulase Activity ◽  
Lytic Polysaccharide Monooxygenase ◽  
Real Time Imaging ◽  
Cellulose Accessibility ◽  
Polysaccharide Monooxygenase
Sign in / Sign up

Export Citation Format

Share Document