Effect of Microwave-Assisted Pretreatment Conditions on Hemicellulose Conversion and Enzymatic Hydrolysis of Norway Spruce

Kuittinen, Suvi; Rodriguez, Yohama Puentes; Yang, Ming; Keinänen, Markku; Pastinen, Ossi; Siika‐aho, Matti; Turunen, Ossi; Pappinen, Ari

doi:10.1007/s12155-015-9696-9

Cited by 19 publications

(3 citation statements)

References 36 publications

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“…The literature describes the extraction of hemicellulose by various methods, and conventional hot water extraction has been combined with numerous different additives such as acids, bases, or organic solvents. − Also, ionic liquids have been used; however, in large-scale applications, the costs and recycling are still limiting factors . It is possible to enhance the extraction process even with unconventional physical methods, such as applying microwaves or high-voltage electric discharges. , As a whole, the field of research is very broad and diverse, and it can be concluded that extraction of hemicellulosic compounds can be performed with many different methods. From an industrial viewpoint, the question is perhaps more by what means it is practical and economically viable.…”

Section: Introductionmentioning

confidence: 99%

“…25 It is possible to enhance the extraction process even with unconventional physical methods, such as applying microwaves or high-voltage electric discharges. 26,27 As a whole, the field of research is very broad and diverse, and it can be concluded that extraction of hemicellulosic compounds can be performed with many different methods. From an industrial viewpoint, the question is perhaps more by what means it is practical and economically viable.…”

Section: ■ Introductionmentioning

confidence: 99%

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Intensification of Hydrothermal Biomass Fractionation with the Help of Oxygen: Kinetics and Modeling

Rissanen

Lagerquist

Hemming

et al. 2022

ACS Sustainable Chem. Eng.

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The aim of this study was to examine the influence of the oxygen atmosphere on hydrothermal fractionation of Norway spruce at 130−160 °C and 1−50 bar. The quantitative kinetics and qualitative aspects of the hemicellulose extraction were studied. The results show that the fractionation can be considerably enhanced already by low concentrations of oxygen. The ratio of lignin to hemicellulose extracted from the wood did not significantly vary with the gas atmosphere. A mathematical model was successfully developed for the extraction kinetics revealing an activation energy of 114 kJ/mol and 1/5 reaction order for the hydronium ion concentration and 1/7 reaction order for oxygen concentration. The method is easily applicable also to existing equipment and is nontoxic for obtaining extracts for use also in, for example, the alimentary and cosmetics industries, without the need for costly separation steps. Moreover, the process intensification results in increased energy, space, and time efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Intensification of Hydrothermal Biomass Fractionation with the Help of Oxygen: Kinetics and Modeling

Rissanen

Lagerquist

Hemming

et al. 2022

ACS Sustainable Chem. Eng.

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“…Challenges in inhibition during microbial biorefining processes are likely to become more and more important as processes based on high dry-matter content, high product concentrations, and processes with recirculation of process water are developed (Jönsson et al 2013). Even small changes in the pretreatment conditions, such as the pH and temperature, can noticeably affect especially the hemicellulose solubilization from the solid material to the liquid prehydrolysate and the formation of harmful degradation products (Yang et al 2013, Kuittinen et al 2016. Additionally, changes in the pretreatment conditions affect the quality of the remaining solid fraction and in that sense the applicability of the pretreated material.…”

Section: Introductionmentioning

confidence: 99%

Acetone–butanol–ethanol fermentation of non-detoxified dilute acid extracted hemicellulosic hydrolysate from the short-rotation coppice Salix schwerinii E. Wolf

Kuittinen

Yang

Kaipiainen

et al. 2018

BioRes

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The dilute acid-catalyzed extraction of hemicellulosic monosaccharides from the short-rotation coppice Salix schwerinii E. Wolf was optimized to find a balance between the yields of fermentable monosaccharides and sugar degradation products for non-detoxified acetone-butanol-ethanol fermentation with Clostridium acetobutylicum. At the same time, the cellulosic and lignin fractions were kept as intact as possible for further refining. The highest xylose and glucose yields in the liquid prehydrolysate were 65% and 9.45% of their respective original content at a combined severity of 2.29. Increased concentrations of glucose and sugar degradation products in the liquid prehydrolysates were detected with an increasing pretreatment temperature and combined severity, while the acid-insoluble lignin remained stable. During the fermentation of the non-detoxified liquid prehydrolysate with grain starch as the supplement, 66% of the xylose was utilized, and the butanol and acetone-butanol-ethanol yields were 0.22 g/g and 0.35 g/g monosaccharides, respectively, in the fermentation medium. The results suggested that the hemicellulose in S. schwerinii can be separately extracted as a side stream and utilized for butanol fermentation with starch-based materials without a separate detoxification stage.

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Choice of Pretreatment Technology for Sustainable Production of Bioethanol from Lignocellulosic Biomass: Bottle Necks and Recommendations

Kumar¹,

Rajarathinam²,

Thenmozhi³

et al. 2018

Waste Biomass Valor

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Effect of Microwave-Assisted Pretreatment Conditions on Hemicellulose Conversion and Enzymatic Hydrolysis of Norway Spruce

Cited by 19 publications

References 36 publications

Intensification of Hydrothermal Biomass Fractionation with the Help of Oxygen: Kinetics and Modeling

Intensification of Hydrothermal Biomass Fractionation with the Help of Oxygen: Kinetics and Modeling

Acetone–butanol–ethanol fermentation of non-detoxified dilute acid extracted hemicellulosic hydrolysate from the short-rotation coppice Salix schwerinii E. Wolf

Choice of Pretreatment Technology for Sustainable Production of Bioethanol from Lignocellulosic Biomass: Bottle Necks and Recommendations

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