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.

Different Patterns of Ionic Liquids-Regenerated Cellulose Carriers for Papain Immobilization

2013 ◽  
Vol 864-867 ◽  
pp. 319-323
Author(s):  
Ya Mei Yuan ◽  
Qiu Jin Li ◽  
Song Kun Yao ◽  
Ji Xian Gong ◽  
Jian Fei Zhang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Sem Analysis ◽  
Room Temperature Ionic Liquid ◽  
Free Enzyme ◽  
Regenerated Cellulose ◽  
Imidazolium Chloride

Different patterns (beads, membranes and powders) of cellulose regenerated from room temperature ionic liquid 1-butyl-3-methyl imidazolium chloride ([Bmim]Cl) were prepared to immobilized papain molecules. It is found that regenerated cellulose (RC) membranes was the best pattern for papain loading and immobilization. Removing the supernatant of the solution containing free enzyme as well as RC carriers before immobilization without the addition of ethanol as the precipitant were benefit for increasing the activity of the immobilized papain. Papain could be immobilized successfully on the surface of RC carriers through SEM analysis.

An efficient process for lignin extraction and enzymatic hydrolysis of corn stalk by pyrrolidonium ionic liquids

2016 ◽  
Vol 148 ◽  
pp. 138-145 ◽  
Author(s):  
Hui-Hui Ma ◽  
Bi-Xian Zhang ◽  
Peng Zhang ◽  
Shuang Li ◽  
Yun-Fei Gao ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Enzymatic Hydrolysis ◽  
Corn Stalk ◽  
Efficient Process ◽  
Lignin Extraction ◽  
Hydrolysis Of

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.

Effects of ionic liquid/water mixture pretreatment on the composition, the structure and the enzymatic hydrolysis of corn stalk

2018 ◽  
Vol 122 ◽  
pp. 142-147 ◽  
Author(s):  
Xiaohui Hu ◽  
Li Cheng ◽  
Zhengbiao Gu ◽  
Yan Hong ◽  
Zhaofeng Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Enzymatic Hydrolysis ◽  
Liquid Water ◽  
Water Mixture ◽  
Corn Stalk ◽  
Hydrolysis Of

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 Pyrrolidinium Ionic Liquids as Effective Solvents for Lignin Extraction and Enzymatic Hydrolysis of Lignocelluloses

BioResources ◽  
2016 ◽  
Vol 11 (3) ◽  
Author(s):  
Xiao-Mei Hu ◽  
Shuang Li ◽  
Hui-Hui Ma ◽  
Bi-Xian Zhang ◽  
Yun-Fei Gao
Keyword(s):  
Ionic Liquids ◽  
Enzymatic Hydrolysis ◽  
Lignin Extraction ◽  
Hydrolysis Of

Immobilization of Papain on Regenerated Cellulose from Ionic Liquids

2013 ◽  
Vol 448-453 ◽  
pp. 1651-1655
Author(s):  
Ya Mei Yuan ◽  
Qiu Jin Li ◽  
Song Kun Yao ◽  
Wei Zhang ◽  
Jian Fei Zhang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
High Activity ◽  
Ethyl Ester ◽  
Enzyme Activities ◽  
Room Temperature ◽  
Immobilized Enzyme ◽  
Regenerated Cellulose ◽  
Ester Hydrochloride ◽  
Imidazolium Chloride

Films and beads of cellulose regenerated from room temperature ionic liquid 1-butyl-3-methyl imidazolium chloride ([BmiCl) were prepared. In this work, regenerated cellulose (RC) films and beads were modified with NaIO4, and then papain was immobilized. The immobilized enzyme activities of RC carriers were determinated by BAEE (N-benzoyl-DL-arginine ethyl ester hydrochloride) method. According to the experiments, 5.0mg/mL of free papain was fixed to obtain the immobilized enzyme with high activity. Moreover, high content of cellulose regenerated from ILs (<saturated content) was benefit to achieve high activity of enzyme after immobilization.

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