scholarly journals Enzymatic hydrolysis of lignocellulosic polysaccharides in the presence of ionic liquids

2015 ◽  
Vol 17 (2) ◽  
pp. 694-714 ◽  
Author(s):  
R. M. Wahlström ◽  
A. Suurnäkki
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Enzymatic Hydrolysis ◽  
Recent Progress ◽  
Biomass Pretreatment ◽  
Enzymatic Systems ◽  
Hydrolysis Of

This article reviews the recent progress in designing compatible ionic liquid–enzymatic systems for biomass pretreatment and hydrolysis as a step in the production of biofuels and -chemicals from lignocellulosic polysaccharides.

scholarly journals Enzymatic hydrolysis of chicken viscera proteins in the presence of an ionic liquid as a strategy to improve the antioxidant properties of the hydrolysates

2019 ◽  
Author(s):  
Vitor Geniselli da Silva ◽  
Ruann Janser Soares de Castro
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Enzymatic Hydrolysis ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Protein Hydrolysates ◽  
Tetramethylammonium Bromide ◽  
Chicken Viscera ◽  
Hydrolysis Of

Aiming to explore the use of ionic liquids (ILs) not yet described in the literature, this work evaluated the hydrolysis of proteins from chicken viscera using the protease Alcalase modified and unmodified by the IL tetramethylammonium bromide. The protein hydrolysates produced in the presence of the IL presented values of antioxidant activities 40% higher than the hydrolysates obtained without IL. In addition, with the presence of the IL, it was possible to obtain protein hydrolysates from chicken viscera with similar antioxidant activities, compared to the protein hydrolysates produced without IL, using 1/3 of the amount of enzyme.

Ionic Liquid 1-Ethyl-3-Methylpyridinium Diethyl Phosphate Pretreatment of Mulberry Residue

2012 ◽  
Vol 253-255 ◽  
pp. 777-780 ◽  
Author(s):  
Qiang Li ◽  
Xu Ding Gu ◽  
Geng Sheng Ji ◽  
Juan Juan Fei ◽  
Yuan Yuan Feng ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Enzymatic Hydrolysis ◽  
Cellulosic Biomass ◽  
Biomass Pretreatment ◽  
Diethyl Phosphate ◽  
In Situ Processing ◽  
Mild Temperature ◽  
Short Time ◽  
Hydrolysis Of

The IL 1-ethyl-3-methylpyridinium diethyl phosphate ([EPyM][EMP]) and 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) were compared in view of thier superority in pretreatment toward accelerating enzymatic hydrolysis of cellulosic biomass, and they could be recyclable. Efficient ionic liquid pretreatments of cellulose can be obtained with short duration times (20 min) at 50-120 °C with [EPyM][EMP] and [EMIM]OAc. And [EPyM][EMP] showed preferable cellulosic biomass pretreatment capability. The short time and mild temperature of cellulose solubilization allowed a in situ processing of [EPyM][EMP] IL-pretreatment and saccharification.

scholarly journals An Efficient Process for Pretreatment of Lignocelluloses in Functional Ionic Liquids

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Shi-Jia Dong ◽  
Bi-Xian Zhang ◽  
Yun-Fei Gao ◽  
Xiao-Mei Hu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Enzymatic Hydrolysis ◽  
Complex Structure ◽  
Sem Analysis ◽  
Regenerated Cellulose ◽  
Corn Stalk ◽  
Imidazolium Chloride ◽  
Lignin Extraction ◽  
Hydrolysis Of

Background and Aims. The complex structure of the lignocelluloses is the main obstacle in the conversion of lignocellulosic biomass into valuable products. Ionic liquids provide the opportunities for their efficient pretreatment for biomass. Therefore, in this work, pretreatment of corn stalk was carried out in ultrasonic-assisted ionic liquid including 1-butyl-3-methylimidazolium chloride [BMIM]Cl, 1-H-3-methylimidazolium chloride [HMIM]Cl, and 1-(1-propylsulfonic)-3-imidazolium chloride [HSO3-pMIM]Cl at 70°C for 2 h. We compared the pretreatments by ionic liquid with and without the addition of deionized water. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were employed to analyze the chemical characteristics of regenerated cellulose-rich materials.Results. [HMIM]Cl and [HSO3-pMIM]Cl were effective in lignin extraction to obtain cellulose-rich materials. FTIR analysis and SEM analysis indicated the effective lignin removal and the reduced crystallinity of cellulose-rich materials. Enzymatic hydrolysis of cellulose-rich materials was performed efficiently. High yields of reducing sugar and glucose were obtained when the corn stalk was pretreated by [HMIM]Cl and [HSO3-pMIM]Cl.Conclusions. Ionic liquids provided the ideal environment for lignin extraction and enzymatic hydrolysis of corn stalk and [HMIM]Cl and [HSO3-pMIM]Cl proved the most efficient ionic liquids. This simple and environmentally acceptable method has a great potential for the preparation of bioethanol for industrial production.

Point by point analysis: how ionic liquid affects the enzymatic hydrolysis of native and modified cellulose

2010 ◽  
Vol 12 (11) ◽  
pp. 1959 ◽  
Author(s):  
Philip Engel ◽  
Radoslav Mladenov ◽  
Helene Wulfhorst ◽  
Gernot Jäger ◽  
Antje C. Spiess
Keyword(s):  
Ionic Liquid ◽  
Enzymatic Hydrolysis ◽  
Point Analysis ◽  
Hydrolysis Of ◽  
Modified Cellulose

Enzymatic hydrolysis of penicillin G in ionic liquids

2008 ◽  
Vol 136 ◽  
pp. S391
Author(s):  
Mai Ngoc Lan ◽  
Sung Ho Ha ◽  
Yoon-Mo Koo
Keyword(s):  
Ionic Liquids ◽  
Enzymatic Hydrolysis ◽  
Penicillin G ◽  
Hydrolysis Of

scholarly journals EVALUATION OF ALKALINE PRETREATMENT ON THE ENZYMATIC HYDROLYSIS OF CARNAUBA STRAW RESIDUE

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Alan De Oliveira Campos ◽  
Francinaldo Leite Da Silva ◽  
Emilianny Rafaely Batista Magalhães ◽  
Gorete Ribeiro De Macedo ◽  
Everaldo Silvino Dos Santos
Keyword(s):  
Enzymatic Hydrolysis ◽  
Cellulosic Ethanol ◽  
Chemical Characterization ◽  
Crystallinity Index ◽  
Biomass Pretreatment ◽  
Cellulose Conversion ◽  
Hydrolysis Of ◽  
Potential Use ◽  
Second Generation Ethanol

Carnauba (Copernicia prunifera) straw residue generated from production of its wax is rich in cellulose, thus showing a potential use in the production of second generation ethanol. However, the high lignin and hemicellulose load associated with cellulose makes it difficult the enzymatic attack, thus having the need of an adequate pretreatment of this material. The objective of this study was to optimize the enzymatic hydrolysis of carnauba straw residue, focusing on the alkaline biomass pretreatment. Therefore, NaOH solutions at concentrations of 1.0% (w/v) (PA1), 2.0% (w/v) (PA2), 3.0% (w/v) (PA3) and 4.0% (w/v) (PA4) were used. The chemical and physical characterization of natural and pre-treated carnauba straw were according to the NREL, and DRX and FTIR performed analyzes. The materials chemical characterization showed that all the used pretreatments were able to remove a significant amount of lignin and hemicellulose, which can improve the enzymes access, favoring the increase of cellulose conversion. In relation to DRX analysis an increase in crystallinity index happens reaching up to 55.15% after the pretreatment PA4, which may be associated to the removal of hemicellulose and amorphous lignin, related to cellulose. After a period of 96 hours of enzymatic hydrolysis, the PA4 pretreated residue showed the best performance with a cellulosic conversion of 78%. Spite of a slightly lower performance of the residue that presented higher cellulose conversion, the pretreated material PA2 is an alternative to reduce costs in the cellulosic ethanol production.

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