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The effects of lignosulfonate (LS) on enzymatic saccharification of pure cellulose were studied. Four fractions of LS with different molecular weight (MW) prepared by ultrafiltration of a commercial LS were applied at different loadings to enzymatic hydrolysis of Whatman paper under different pH.…
Author(s): Hongming Lou, Haifeng Zhou, Xiuli Li, Mengxia Wang, J.Y. Zhu, Xueqing Qiu
Keywords: enzymatic hydrolysis, cellulose saccharification, lignosulfonate, surfactant cellulase binding, hydrophobic interaction, nonproductive binding
Source: Cellulose, Volume 21, 2014; pp. 1351-1359.
Year: 2014
This study applied dilute acid (DA) and sulfite pretreatment to overcome the recalcitrance of lignocelluloses (SPORL) to deconstruct earlywood and latewood cell walls of Douglas fir for fermentable sugars production through subsequent enzymatic hydrolysis. DA pretreatment removed almost all the…
Author(s): Chao Zhang, Xiaochun Lei, C. Tim Scott, J.Y. Zhu, Kecheng Li
Keywords: cell walls, pretreatment, enzymatic hydrolysis, earlywood and latewood, recalcitrance
Source: Bioenerg. Res. Volume 7, 2014; pp. 362-370.
Year: 2014
Hydrolysis experiments with commercial cellulases have been performed to understand the effects of cell wall crystallinity and lignin on the process. In the focus of the paper are loblolly pine wood samples, which were systematically delignified and partly ball-milled, and, for comparison, Whatman…
Author(s): Umesh P. Agarwal, J.Y. Zhu, Sally A. Ralph
Keywords: ball milling, cellulase, cellulose, crystallinity, enzymatic hydrolysis, hydrolysis, lignin, loblolly pine, wood
Source: Holzforschung 2013; Volume 67, Number 4: 2013; pp. 371–377.
Year: 2013
The use of renewable materials has received a great deal of attention over the last several decades due to the environmental impact and finite resources of petroleum and other non-renewable resources. Cellulose nanofibrils are a type of nanomaterial made from natural resources like wood and non-…
Author(s): Yan Qing, Ronald Sabo, J.Y. Zhu, Zhiyong Cai, Yiqiang Wu
Keywords: Cellulose nanofibrils, enzymatic hydrolysis, mechanical properties, cellulose nanocrystals
Source: In Proceedings of Advancements in Fiber-Polymer Composites: Wood Fiber, Natural Fibers, and Nanocellulose, May 6-7, 2013, Milwaukee, WI; 2013; 3 p.
Year: 2013
Cellulose nanofibrils (CNFs), which are generated from abundant, environmentally friendly natural plant resources, display numerous interesting properties such as outstanding mechanical strength, negligible light scattering, and low thermal expansion (Zimmermann et al., 2010). These nanofibers are…
Author(s): Yan Qing, Ronald Sabo, Zhiyong Cai, Yiqiang Wu
Keywords: cellulose nanofibrils, enzymatic hydrolysis, mechanical properties, cellulose nanocrystals
Source: In Proceedings of Advancements in Fiber-Polymer Composites: Wood Fiber, Natural Fibers, and Nanocellulose, May 6-7, 2013, Milwaukee, WI; 2013; 3 p.
Year: 2013
One key barrier to converting woody biomass to biofuel through the sugar platform is the low efficiency of enzymatic cellulose saccharification due to the strong recalcitrance of the crystalline cellulose. Significant past research efforts in cellulosic biofuels have focused on overcoming the…
Author(s): Ronald Sabo, J.Y. Zhu
Keywords: cellulose nanofibrils, cellulosic biofuel, enzymatic hydrolysis
Source: In: Production and applications of Cellulose Nanomaterials, Chapter 2.1, TAPPI Press 2013; pp. 191-193.
Year: 2013
This study investigated the effects of chemical pretreatment and disk-milling conditions on energy consumption for size-reduction and the efficiency of enzymatic cellulose saccharification of a softwood. Lodgepole pine wood chips produced from thinnings of a 100-year-old unmanaged forest were…
Author(s): W. Zhu, Junyong Zhu, Roland Gleisner, X.J. Pan
Keywords: Size reduction, disk-milling, disk refining, forest biomass, woody biomass, enzymatic hydrolysis, saccharification, SPORL, fuelwood, biomass energy, biomass, utilization, biotechnology, energy consumption, pretreatment, sugars, cellulose, hydrolysis, lodgepole pine, sulfuric acid, enzymes, biotechnology, industrial applications, wood chips, lignocellulose, biodegradation, glucose, feedstock, hemicellulose, biomass fuel, bioconversion, biorefining, wood extractives, chemical utilization, chips
Source: Bioresource technology. Vol. 101 (2010): p. 2782-2792.
Year: 2010
This review presents a comprehensive discussion of the key technical issues in woody biomass pretreatment: barriers to efficient cellulose saccharification, pretreatment energy consumption, in particular energy consumed for wood-size reduction, and criteria to evaluate the performance of a…
Author(s): Junyong Zhu, X.J. Pan
Keywords: Pretreatment, woody biomass, forest biomass, enzymatic hydrolysis, saccharification, cellulosic ethanol, size reduction, alcohol, fuelwood, biomass energy, biomass, utilization, biotechnology, energy consumption, sugars, lignocellulose, biodegradation, cellulose, hydrolysis, feedstock, lignin, enzymes, industrial applications, SPORL, biomass fuel, ethanol, bioconversion, biorefining, wood extractives, chemical utilization, review article
Source: Bioresource technology. Vol. 101 (2010): p. 4992-5002.
Year: 2010
Dilute acid (DA) and Sulfite Pretreatment to Overcome Recalcitrance of Lignocelluloses (SPORL) pretreatments were directly applied to wood chips of four poplar wood samples of different genotypes (hereafter referred to as poplars; Populus tremuloides Michx. ‘native aspen collection’; Populus…
Author(s): Z.J. Wang, J.Y. Zhu, Ronald S. Jr. Zalesny, K.F. Chen
Keywords: Aspen, poplar, enzymatic hydrolysis, fermentation, cellulosic ethanol, pretreatment, recalcitrance, hydrolysis, sugars, biomass energy, biomass, pretreatment, lignocellulose, biotechnology, wood chips, enzymes, industrial applications, fuelwood, cellulose, lignin, biodegradation, Populus deltoides, Populus tremuloides, Populus nigra, Populus maximowiczii, hemicellulose, feedstock, sulfuric acid, fungi, yeast fungi, Saccharomyces cerevisiae, hydrolysis, SPORL, biomass fuel, bioconversion, alcohol, biorefining, biofuels, saccharification, chips, chemical utilization, xylan, cellulosic ethanol
Source: Fuel. Vol. 95 (May 2012): p. 606-614.
Year: 2012
In scale-up, the potential of ethanol production by dilute sulfuric acid pretreatment using corncob was investigated. Pretreatments were performed at 170 °C with various acid concentrations ranging from 0% to 1.656% based on oven dry weight. Following pretreatment, pretreated biomass yield ranged…
Author(s): Jae-Won Lee, J.Y. Zhu, Danilo Scordia, Thomas W. Jeffries
Keywords: Pretreatment, enzymatic hydrolysis, corncobs, ethanol, fermentation, corn residues, biomass utilization, biomass energy, fungi, biotechnology, yeast fungi, enzymes, industrial applications, hydrolysis, Pichia stipitis, glucose, chemical reactions, sugars, sulfuric acid, feedstock, alcohol, biomass fuel, biorefining, bioconversion, corn as fuel, xylan, decay fungi, acid hydrolysis, xylose, hydrolysates
Source: Applied biochemistry and biotechnology. Vol. 165, nos. 3/4 (Oct. 2011): p. 814-822.
Year: 2011
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