Advantage of Acid Sulfite Cooking as Processes of Bioethanol Production

Tanifuji, Keishi; Takahashi, Shiho; Kajiyama, Mikio; Ohi, Hiroshi; Nakamata, Keiichi

doi:10.2524/jtappij.65.494

Cited by 27 publications

(15 citation statements)

References 12 publications

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“…Wood(40-60 mesh)and pulp samples were first subjected to a treatment with 72% sulfuric acid at room temperature or 2.5 h. Thereafter, the mixture was diluted with water to 4% sulfuric acid concentration and then subjected to hydrolysis at 120℃ for 1 h. Klason lignin content of these samples was determined by weighing the acid-insoluble residue obtained from hydrolysis, while the content of acid-soluble lignin was determined by using the UV method 9) . The hydrolysates were diluted and subjected to ion chromatography to analyze the mono sugars 10) . The wood samples were subjected to alkaline nitrobenzene oxidation analysis 11) on lignin aromatic structure.…”

Section: Chemical Analysis Of Wood and Pulpmentioning

confidence: 99%

Kraft Cooking and Bleaching Ability of Lowdensity Acacia Wood and Hardwoods with Varying Chemical Characteristics of Lignin

et al. 2018

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Low-density acacia(Acacia hybrid)wood chips, relatively high-density acacia(Acacia mearnsii)wood chips, eucalyptus(Eucalyptus globulus)wood chips, and Japanese mixed hardwood chips were cooked through a kraft cooking process using the continuous conventional mill digester. Chemical composition of these wood chips and properties of the obtained pulps were compared. Low-density acacia wood chips showed the highest lignin content, the lowest combined yield of syringaldehyde and vanillin obtained by alkaline nitrobenzene oxidation analysis of the lignin, and the worst cooking response among the four kinds of woods. When the mixture ratio of low-density acacia wood chips in the feedstock was increased, pulp yield and hemicellulose (xylan)content of the pulp were decreased. The physical properties(breaking length, bursting strength, and folding endurance)of the bleached kraft pulp hand sheets slightly decreased with decreasing xylan content of the pulp. However, changes in the hand sheet strength properties had negligible effects on the quality of the paper products.

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Section: Chemical Analysis Of Wood and Pulpmentioning

confidence: 99%

Kraft Cooking and Bleaching Ability of Lowdensity Acacia Wood and Hardwoods with Varying Chemical Characteristics of Lignin

et al. 2018

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“…It has been reported that hemicelluloses in lignocellulosic biomass are first hydrolyzed by acids such as HCl, H2SO4, or H2SO3 into monosaccharides (Taherzadeh and Karimi 2007). Subsequently the fermentation process was employed to convert the monosaccharides into useful compounds, such as ethanol and others (Tanifuji et al 2011;Gaur et al 2016;Kapoor et al 2016). As catalyst, acid catalyzes not only the hydrolysis of polysaccharides into monosaccharides, but also further degradation reactions of monosaccharides into furans and carboxylic acid.…”

Section: Introductionmentioning

confidence: 99%

Decomposition Study of Methyl α-D-Glucopyranoside (MGPα) and Lignin Model Compounds for better Glucose Yield during Sulfurous Acid Treatment

et al. 2017

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From the perspective of bio-refinery, sulfurous acid (H2SO3) treatment of lignocellulosic biomass is attractive because of its ability to act both as an acid catalyst and as a sulfonation agent. Therefore, its capability to hydrolyze polysaccharides (especially glucan) into monosaccharides was compared with two other acids, hydrochloric and sulfuric acids. The decomposition of methyl α-D-glucopyranoside (MGPα) in these three acids, hydrochloric, sulfuric, and sulfurous acids were studied. In addition, p-creosol and vanillyl alcohol were introduced to check whether it is possible to convert polysaccharides (such as hemicelluloses) into monosaccharides during the sulfurous acid treatment. The results showed that the decomposition of MGPα is much slower in H2SO3 than in HCl and H2SO4. The ligninsulfonic acid resulting from the lignin sulfonation reaction can be expected to improve the efficiency of hydrolysis of polysaccharides into monosaccharides during sulfurous acid treatment. Moreover, a higher actual yield of glucose was obtained in this case than in the other two acids. .

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“…Palmitic acid was expected to be bound to the residual lignin of EFB pulps. Tanifuji et al (2011) used Py-GC/MS to measure the enzyme activity in terms of FPU adsorbed to residual lignin. However, the amount of enzyme present in the form of protein was not estimated.…”

Section: Py-gc/ms Of the Residual Ligninmentioning

confidence: 99%

“…It is therefore important to enhance our understanding on the adsorption of enzymes on residual lignin when EFB is used as a raw material for bioethanol production. In a previous study (Tanifuji et al 2011), the enzyme activity in terms of filter paper units (FPU) adsorbed onto residual lignin has been estimated by pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Residual Lignin Obtained by the Enzymatic Hydrolysis of Oil Palm Empty Fruit Bunch Pulps

H'ng

Nakagawa-Izumi

Leh³

et al. 2016

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Residual lignin present in alkali pulps prepared from oil palm (Elaeis guineensis) empty fruit bunch was isolated using an enzymatic method and characterized successfully by pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS). These pulps were prepared by sodaanthraquinone (AQ) and prehydrolysis (PH) soda-AQ cooking methods (pulp yields were 45.3 and 33.9%, respectively). Py-GC/MS of the residual lignin showed that two pyrolysis products which were indole and methylindole originating from the enzyme (contents 12 to 44%), in addition to eight pyrolysis products originating from syringyl (S) and guaiacyl (G) structure of lignin. Furthermore, palmitic acid was also detected in the residual lignin (contents 0.11 to 0.28%). The residual lignin was subjected to further purification by a cellobiose treatment method, and the quantity of enzyme present in the residual lignin was found to decrease after the treatment. Residual lignin in PH-soda-AQ pulp exhibited a higher S/G ratio (0.86 to 0.98) than that in soda-AQ pulp (0.76 to 0.97). This study showed that the contents of lignin (19 to 44%) and enzyme in enzymatically isolated lignin can be estimated by the Py-GC/MS method.

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Advantage of Acid Sulfite Cooking as Processes of Bioethanol Production

Cited by 27 publications

References 12 publications

Kraft Cooking and Bleaching Ability of Lowdensity Acacia Wood and Hardwoods with Varying Chemical Characteristics of Lignin

Kraft Cooking and Bleaching Ability of Lowdensity Acacia Wood and Hardwoods with Varying Chemical Characteristics of Lignin

Decomposition Study of Methyl α-D-Glucopyranoside (MGPα) and Lignin Model Compounds for better Glucose Yield during Sulfurous Acid Treatment

Characterization of Residual Lignin Obtained by the Enzymatic Hydrolysis of Oil Palm Empty Fruit Bunch Pulps

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