The Study on Pulverized Wood Characteristics and Its Enzymatic Saccharification

Kobayashi, Nobusuke; Ushikoshi, Juntaro; Inano, Minoru; Takaoka, Kazue; Itaya, Yoshinori

doi:10.3775/jie.89.975

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…After this research work, many researchers became involved in biomass hydrothermal experiment and then developed enzyme saccharification pretreatment technique and chemicals production technology. Yamada et al, Hayashi et al, Kumagai et al, − and Kobayashi et al − conducted hydrothermal experiment with various biomass species. This research work clarified decomposing material of biomass, illustrated the hydrolysis mechanism of lignocellulose associated with the hydrothermal reaction, and explained the optimum reaction conditions of different biomasses, in a batch type reactor.…”

Section: Introductionmentioning

confidence: 99%

Fluid Behavior of Woody Biomass Slurry during Hydrothermal Treatment

Kobayashi

Okada

Tanabe

et al. 2011

Ind. Eng. Chem. Res.

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Hydrothermal experiment of woody biomass was carried out in an autoclave, and a property change of the woody slurry associated with hydrothermal reaction was analyzed. The reaction conditions, such as reaction temperature, reaction period, and slurry concentration, were varied in this experiment, and the effect of the hydrothermal conditions on the slurry characteristics was evaluated. To evaluate the property change of the woody slurry, apparent viscosity, particle size, pH, and ζ potential measurements of the hydrothermally influenced slurry were conducted. The fluid resistance of the slurry during hydrothermal experiment was also measured with an autoclave reactor. With application of hydrothermal treatment on a woody slurry, significant change of the slurry property was observed. The particle size decreased during hydrothermal experiment with increasing reaction temperature, and this particle size change influenced the slurry behavior. Due to the particle size reduction, the apparent viscosity of the treated slurry became smaller, and the treated slurry showed strong pseudoplastic fluid behavior. With a longer reaction period, the particle size was getting smaller by the hydrolysis reaction; however, particle size enlargement caused by a swelling and/or agglomeration occurred when the reactor’s temperature started to increase. This particle size enlargement behavior at the beginning of the hydrothermal experiment increased the fluid resistance of the slurry significantly. pH value and the ζ potential value were also influenced by the hydrothermal treatment. pH and absolute ζ potential values dropped with increasing reaction temperature; however, the absolute ζ potential value of the slurry reversely increased when the reaction temperature was over 523 K. The increment of carboxyl radical on the surface of the reacted particle changed particle−particle and particle−solvent interactions.

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