New process of maize stalk amination treatment by steam explosion

Chen, Hongzhang; Liu, Liying; Yang, Xu-Zhao; Li, Zuohu

doi:10.1016/j.biombioe.2004.06.010

Cited by 43 publications

(23 citation statements)

References 15 publications

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“…The enzymatic hydrolysis plat stages started after 48 h. The hydrolysis rate improvement of SEWS treated with [BMIM]Cl was less than that of wheat straw treated with [BMIM]Cl. Previous studies proved that steam explosion could reduce the particle size and expand the micropores of straw, which increased sites for bacterial attachment and accessibility to free enzymes [19,20] . Breakdown of hemicellulose and delignification of the cell wall have been suggested as the main chemical reactions, which increased availability of cellulose [21][22][23] .…”

Section: Effect Of [Bmim]cl Treatment On Enzymatic Hydrolysis Of Steamentioning

confidence: 99%

Enzymatic hydrolysis of cellulose materials treated with ionic liquid [BMIM] Cl

2006

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A new cellulose solvent ionic liquid 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) was used to treat wheat straw and steam-exploded wheat straw (SEWS) in order to improve the enzymatic hydrolysis rates, while the water was used as the control. The enzymatic hydrolysis results showed that the hydrolysis rates of materials treated with [BMIM]Cl were improved. The hydrolysis rate of treated wheat straw could reach 70.37% and the SEWS could be completely hydrolyzed, while hydrolysis rates of the wheat straw and SEWS treated with water were 42.78% and 68.78% under the same conditions, respectively. The FTIR analysis and polymerization degree measurement indicated that the hydrolysis rates improvement was attributed to the decrease of the polymerization degrees of cellulose and hemicellulose, the absolute crystallinity degree of cellulose and the increase of its reaction accessibility.

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Section: Effect Of [Bmim]cl Treatment On Enzymatic Hydrolysis Of Steamentioning

confidence: 99%

Enzymatic hydrolysis of cellulose materials treated with ionic liquid [BMIM] Cl

2006

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“…Steam explosion is the most commonly used method for the pretreatment of lignocellulosic materials [7][8][9]. The physicochemical treatment steams materials with highpressure saturated steam for several seconds to a few minutes, and then exposes these materials to atmospheric pressure.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Oil Extraction from Sumac Fruit using Steam‐Explosion Pretreatment

Chen

2010

J Americ Oil Chem Soc

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Steam explosion, in which materials are crushed through rapid decompression after high-pressure steaming, has been widely used for biomass pretreatment. In this study, we used steam-explosion pretreatment (SEP) for oil extraction from sumac fruit. SEP reduced particle size and formed fissures and micropores on the fruit. The kinetics of the extraction process indicates that under optimal conditions (steam pressure 1.5 MPa, residence time 3 min), the oil yield at equilibrium increased to 16.04%, approximately fourfold higher than that of the raw sample. The mass transfer coefficient of the oil extraction decreased as a result of SEP. In addition, the acidity of the extracted oil decreased and peroxide value increased in the steam-exploded sample compared with that of the raw material. Few changes in fatty acid composition were observed, with low palmitic acid content and high linoleic acid composition. These results suggest that SEP improved the yield of oil extraction from sumac fruit and affected oil quality.

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“…By the combination of steam explosion and solvent extraction (ethanol [164]; ionic liquids [165,166]; glycerol [167]; etc.). It achieves raw chemical fractionation and forms a high-value transformed route for straw that includes xylooligosaccharide (or xylitol) from straw hemicellulose, enzymatic hydrolysis and fermentation of cellulose, and lignin separation and purification.…”

Section: Research Methods For Cellulose Biotransformation Ecological mentioning

confidence: 99%

Research Methods for the Biotechnology of Lignocellulose

Chen

2014

Biotechnology of Lignocellulose

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Biotechnology for lignocellulose conversion is developed with its research and application. During this process, the research method plays an important role in discovering, exploring, and establishing theories. The research method for lignocellulose conversion is also necessary for industrialization testing and control. In this chapter, research methods for the biotechnology of lignocellulose are presented. According to the biological conversion process of lignocelluloses, research methods are classified into three types: research methods for primary refining, research methods for hydrolysis with microorganisms, and research methods for fermentation engineering. Finally, research methods for the whole biotransformation process are also summarized. In each part, the related research advances of my group are also given. Keywords Research methods • Biochemical methods • Fermentation engineering methods • Primary refining methods • Life cycle assessment Research Methods for the Cellulose Primary Refining Process IntroductionCellulose materials should be converted into middle products first and then converted into final bioenergy and biomaterials. However, for cellulose materials, the compact structure formed by cellulose, hemicellulose, and lignin results in high energy cost while converting cellulose materials into sugar. Moreover, it is hard to fulfill the requirements of further conversion into bioenergy and biomaterials. Therefore, it would be important to research the changes of lignocellulosic materials in the process of primary conversion and the effect of different methods on these changes. This way, the recalcitrance of hydrolysis would be solved, and refining technology would be set up for the conversion of different materials into related products [1]. The recalcitrance of lignocellulosic materials includes two aspects: structure and components. Currently, characterization methods for lignocellulosic material components are usually from the papermaking area. In addition, near-infrared, X-ray diffraction, and electrical scanning technologies are applied to analyze the crystal structure and surface characteristics of cellulose materials. However, advanced characterization technology should be introduced to form a complete characterization technology system for deep and realistic recognition from different levels and aspects.Cross-discipline examination and re-creation are necessary to overcome difficult problems in the sciences. Now, discoveries are usually from a visual description or modeling. So, the scientific rules should be followed to find the recalcitrance of cellulose materials in the primary refining process: from visual to abstract, from macro to micro, from outside to inside. In this section, the research methods are introduced gradually according to this order.At first, the morphological and structural changes should be characterized because it could provide direct recognition. Especially, different changes could be observed in the process of primary refining, including special structur...

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New process of maize stalk amination treatment by steam explosion

Cited by 43 publications

References 15 publications

Enzymatic hydrolysis of cellulose materials treated with ionic liquid [BMIM] Cl

Enzymatic hydrolysis of cellulose materials treated with ionic liquid [BMIM] Cl

Enhancement of Oil Extraction from Sumac Fruit using Steam‐Explosion Pretreatment

Research Methods for the Biotechnology of Lignocellulose

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