Effect of steam explosion pretreatment with ultra-high temperature and pressure on effective utilization of softwood biomass

Asada, Chikako; Sasaki, Chizuru; Uto, Yoshihiro; Sakafuji, Jun; Nakamura, Yoshitoshi

doi:10.1016/j.bej.2011.09.013

Cited by 44 publications

(26 citation statements)

References 20 publications

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“…The yields of these molecules significantly decreased from the steam exploded sample that indicates the reduction of the hemicellulose component during the steam explosion in agreement with the literature data [4,[24][25][26][27][28]. This finding has been confirmed by the TG/MS curves of the samples (Fig.…”

Section: Pyrolysis Resultssupporting

confidence: 91%

“…Steam explosion is recognized as one of the most cost-effective pretreatment process [22,23] with high effectiveness especially for softwoods [24,25]. During this method biomass is treated with high-pressure saturated steam and then the pressure is suddenly reduced, which makes the materials undergo an explosive decompression.…”

Section: Introductionmentioning

confidence: 99%

“…The applied temperature and pressure of the steam explosion can influence the effectiveness of the pretreatment process [26,27]. The three main effects of the steam explosion are the hydrolysis of the hemicellulose fraction, changing the structure of lignin components and reducing the alkali ion content of the samples [23][24][25]. This pretreatment method can become more effective with the addition of sulfuric acid or sulfur dioxide catalysts.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal behavior of native, washed and steam exploded lignocellulosic biomass samples

Sebestyén

Jakab

May

et al. 2013

Journal of Analytical and Applied Pyrolysis

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The aim of this study was to evaluate the chemical changes in the main components (cellulose, hemicellulose and lignin) of various lignocellulosic biomass samples during the steam explosion pretreatment. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetry/mass spectrometry (TG/MS) measurements have been performed on different native, washed and steam exploded woody (willow and spruce) and herbaceous (hemp, wheat straw and sweet sorghum bagasse) biomass samples. The main differences between the thermal decomposition of the samples are interpreted in terms of the altered structure of the biomass samples by the effective steam explosion treatment and the different alkali ion contents which have been determined using inductively coupled plasma-optical emission spectroscopy (ICP-OES) method. In order to separate these two effects, the native biomass samples have been washed with hot water to remove the main parts of the potassium and sodium ions. The concentration of K + and Na + has been reduced in the treated biomass samples so the thermal decomposition mechanism has been altered due to the elimination of the catalytic effects. Principal Component Analysis (PCA) has been used to find statistical correlations between the data. The functional group compositions of the lignin molecules have been modified significantly as indicated by the pyrograms and the score plot of the PCA. The amount of hemicellulose has been reduced. On the other hand, the relative amount of the structurally modified cellulose has been increased in the samples by the steam explosion pretreatment step.

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Section: Pyrolysis Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal behavior of native, washed and steam exploded lignocellulosic biomass samples

Sebestyén

Jakab

May

et al. 2013

Journal of Analytical and Applied Pyrolysis

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show abstract

“…The wood pieces were treated in a batch steam treatment apparatus (steam explosion apparatus NK-2L; Japan Chemical Engineering and Machinery Co. Ltd., Osaka, Japan) (Asada et al, 2012). The apparatus consisted of a steam generator, a pressurized digester, a receiver, and a condenser with a silencing action.…”

Section: High Temperature Saturated Steam Treatmentmentioning

confidence: 99%

Chemical characteristics and enzymatic saccharification of lignocellulosic biomass treated using high-temperature saturated steam: Comparison of softwood and hardwood

Asada

Sasaki

Hirano

et al. 2015

Bioresource Technology

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“…However, since lignocellulosic materials undergoes lignifications and the pretreatment method, i.e. delignification method, is necessary for the effective saccharification and fermentation of lignocellulosic materials [3][4][5], it is desired for cost-effective bioethanol production to use other biomass as a source of bioethanol production. On the other hand, microalgae have been attracted as the most promisingly renewable resource for bioethanol production because of their faster growth rate, higher photosynthetic efficiency and polysaccharide production compared with other energy biomass [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Efficient Extraction of Starch from Microalgae Using Ultrasonic Homogenizer and Its Conversion into Ethanol by Simultaneous Saccharification and Fermentation

Asada¹,

Doi²,

Sasaki³

et al. 2012

Self Cite

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To utilize starch and protein contained in microalgae as carbon and nitrogen sources for ethanol production, an extraction method, i.e. ultrasonic treatment using a homogenizer, and simultaneous saccharification and fermentation (SSF) of extracted microalgae solution were studied using Chlamydomonas fasciata Ettl 437. 30 min of ultrasonic treatment gave the maximum extraction ratio of starch contained in microalgae, i.e. 93.8%, that corresponded to 0.408 g-starch/g-dry microalgae. SSF of the extracted solution obtained from ultrasonic treated microalgae at 30 min by glutase-AN and Saccahromyces cerevisiae AM12 provided 0.194 and 0.168 g-ethanol/g-dry microalgae with and without yeast extract, respectively, corresponding to 79.5 and 68.8% of theoretical ethanol yield.

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Effect of steam explosion pretreatment with ultra-high temperature and pressure on effective utilization of softwood biomass

Cited by 44 publications

References 20 publications

Thermal behavior of native, washed and steam exploded lignocellulosic biomass samples

Thermal behavior of native, washed and steam exploded lignocellulosic biomass samples

Chemical characteristics and enzymatic saccharification of lignocellulosic biomass treated using high-temperature saturated steam: Comparison of softwood and hardwood

Efficient Extraction of Starch from Microalgae Using Ultrasonic Homogenizer and Its Conversion into Ethanol by Simultaneous Saccharification and Fermentation

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