Kinetics of fractionation by SO2–ethanol–water (SEW) treatment: understanding the deconstruction of spruce wood chips

RSC Advances ◽  
2012 ◽  
Vol 2 (7) ◽  
pp. 3057 ◽  
Author(s):  
Mikhail Iakovlev ◽  
Adriaan van Heiningen
Keyword(s):  
Wood Chips ◽  
Spruce Wood ◽  
Kinetics Of

A STUDY CONCERNING THE KINETICS OF THE SULPHITE PROCESS

1936 ◽  
Vol 14b (9) ◽  
pp. 336-345
Author(s):  
A. J. Corey ◽  
O. Maass
Keyword(s):  
Wood Chips ◽  
Wood Meal ◽  
Spruce Wood ◽  
Controlled Conditions ◽  
Kinetics Of

Delignification rates of spruce wood chips and wood-meal have been investigated under carefully controlled conditions at temperatures ranging from 100° to 140 °C. The rates are shown to be in only approximate agreement with the monomolecular law, but the change in the rate of delignification with temperature obeys the equation of Arrhenius.

A STUDY OF THE MECHANISM AND KINETICS OF THE SULPHITE PROCESS

1939 ◽  
Vol 17b (4) ◽  
pp. 121-132 ◽  
Author(s):  
J. M. Calhoun ◽  
F. H. Yorston ◽  
O. Maass
Keyword(s):  
Temperature Coefficient ◽  
Arrhenius Equation ◽  
Practical Interest ◽  
Effect Of Temperature ◽  
Wood Meal ◽  
Spruce Wood ◽  
Mechanism And Kinetics ◽  
Kinetics Of

The rate of delignification of resin extracted spruce wood-meal has been determined in calcium-base sulphite liquor at temperatures from 130 °C. down to 50 °C. No break was found in the temperature coefficient curve at the lower temperatures, the reaction following the Arrhenius equation closely. Possible mechanisms of the reaction are discussed in the light of existing theories, and the effect of temperature on the yield of pulp is pointed out for its practical interest.

Enhancement of ethanol production from spruce wood chips by ionic liquid pretreatment

2013 ◽  
Vol 102 ◽  
pp. 163-169 ◽  
Author(s):  
Marzieh Shafiei ◽  
Hamid Zilouei ◽  
Akram Zamani ◽  
Mohammad J. Taherzadeh ◽  
Keikhosro Karimi
Keyword(s):  
Ionic Liquid ◽  
Ethanol Production ◽  
Wood Chips ◽  
Ionic Liquid Pretreatment ◽  
Spruce Wood

Chemical and thermal properties of precipitates made from hydrolysate of spruce wood chips

2019 ◽  
Vol 53 (4) ◽  
pp. 889-909 ◽  
Author(s):  
Dmitry Tarasov ◽  
Mathew Leitch ◽  
Pedram Fatehi
Keyword(s):  
Thermal Properties ◽  
Wood Chips ◽  
Spruce Wood

Swelling, viscoelastic, and anatomical studies on ionic liquid-swollen Norway spruce as a screening tool toward ionosolv pulping

Holzforschung ◽  
2015 ◽  
Vol 69 (9) ◽  
pp. 1059-1067 ◽  
Author(s):  
Hatem Abushammala ◽  
Jorge F. Pontes ◽  
Gustavo H. Gomes ◽  
Anayancy Osorio-Madrazo ◽  
Rossana M.S.M. Thiré ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Norway Spruce ◽  
Viscoelastic Behavior ◽  
Mechanical Analysis ◽  
Promising Candidate ◽  
Sem Images ◽  
Spruce Wood ◽  
Kinetics Of ◽  
Kinetics Of Swelling

Abstract To screen ionic liquid (IL) candidates for wood ionosolv pulping, swelling and viscoelastic studies on Norway spruce wood treated with ionic liquids have been conducted. In particular, the temperature dependency and kinetics of swelling in 1-butyl-3-methylimidazolium acesulfamate ([BMIM]Ace) and in 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) were in focus. The kinetics of volumetric swelling in [BMIM]Ace yielded an Ea of 54 kJ.mol-1 compared to 23 kJ.mol-1 in [EMIM]OAc. The viscoelastic behavior of IL-swollen wood was studied by dynamic mechanical analysis, and the lowest in situ glass transition temperature (Tg) of lignin was ∼58°C and ∼65°C in [BMIM]Ace and in [EMIM]OAc, respectively. These Tg values are lower than that found in water. Higher Tg was calculated by the Gordon-Taylor equation, which means that swelling is not only due to the plasticizing effect of the ILs. SEM images showed that [EMIM]OAc has a stronger plasticizing effect than [BMIM]Ace. Overall, [EMIM]OAc is the most efficient agent for wood swelling, softening, and disintegration and, thus, it is the most promising candidate for ionosolv pulping.

Degradation of Poplar and Spruce Wood Chips Using Alkaline Glycerol

2005 ◽  
Vol 27 (11) ◽  
pp. 1073-1084 ◽  
Author(s):  
Ayhan Demirbaş ◽  
Ali Celik
Keyword(s):  
Wood Chips ◽  
Spruce Wood

Biomechanical pulping of spruce wood chips with Streptomyces cyaneus CECT 3335 and handsheet characterization

Holzforschung ◽  
2005 ◽  
Vol 59 (2) ◽  
pp. 173-177 ◽  
Author(s):  
Manuel Hernández ◽  
M. Jesus Hernández-Coronado ◽  
M. Isabel Pérez ◽  
Esteban Revilla ◽  
Juan C. Villar ◽  
...  
Keyword(s):  
Lignin Content ◽  
Middle Lamella ◽  
Treated Wood ◽  
Strength Properties ◽  
Wood Chips ◽  
Fiber Network ◽  
Spruce Wood ◽  
Gradual Loss ◽  
Acid Soluble Lignin ◽  
Streptomyces Cyaneus

AbstractThe actinobacteriumStreptomyces cyaneusCECT 3335 was evaluated for its ability to delignify spruce wood chips (Picea abies) after 2 weeks of incubation prior to refiner mechanical pulping. Weight loss of the chips during the treatment ranged from 2% to 3%. Chemicalanalysis of the treated wood showed an increase in acid-soluble lignin content concomitant with a notable increase in the acid/aldehyde+ketone [AC/(AL+KE)] ratio of the lignin compared with the control. Structural alterations in wood cell walls were observed by optical and scanning microscopy using astra blue-safranin staining and cryosections stained with gold/palladium, respectively. A gradual loss of lignin from the lumen towards the middle lamella and incipient defiberization could be observed. The estimation of specific energy for the defibration and refining stages of treated pulp showed a 24% reduction in the energy required, largely due to a 30% saving in the defibration of chips. The analysis of handsheets obtained from treated pulp showed a notable improvement in some strength properties, such as breaking length, tear index and stretch. In addition, the high Gurley air resistance value indicates more packing of the voids of the fiber network. These results demonstrate for the first time the suitability ofStreptomyces cyaneusfor biomechanical pulping purposes.

Conditioning of SO2-ethanol-water spent liquor from spruce for the production of chemicals by ABE fermentation

Holzforschung ◽  
2011 ◽  
Vol 65 (4) ◽  
Author(s):  
Evangelos Sklavounos ◽  
Mikhail Iakovlev ◽  
Minna Yamamoto ◽  
Lydia Teräsvuori ◽  
German Jurgens ◽  
...  
Keyword(s):  
Forest Biomass ◽  
Mixed Forest ◽  
Abe Fermentation ◽  
Wood Chips ◽  
Spruce Wood ◽  
Spent Liquor ◽  
Acetone Butanol Ethanol

Abstract The objective of this study is to develop a process for conditioning spent liquor produced by SO2-ethanol-water (SEW) fractionation of spruce wood chips for fermentation to butanol, ethanol and acetone/isopropanol, i.e., by means of the so called acetone-butanol-ethanol (ABE) process using Clostridia bacteria. This study serves as part of an overall project aiming at the development of economic processes for producing chemicals and biofuels from mixed forest biomass via SEW fractionation and ABE fermentation technologies.

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