Kinetics of enzymatic hydrolysis of rice straw by the pretreatment with a bio-based basic ionic liquid under ultrasound

2015 ◽  
Vol 50 (4) ◽  
pp. 623-629 ◽  
Author(s):  
Chun-Yao Yang ◽  
Tony J. Fang
Keyword(s):  
Ionic Liquid ◽  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Basic Ionic Liquid ◽  
Kinetics Of ◽  
Hydrolysis Of

scholarly journals Generation of highly amenable cellulose-Iβ via selective delignification of rice straw using a reusable cyclic ether-assisted deep eutectic solvent system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chiranjeevi Thulluri ◽  
Ravi Balasubramaniam ◽  
Harshad Ravindra Velankar
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Deep Eutectic Solvent ◽  
Solvent System ◽  
Cyclic Ether ◽  
Cellulolytic Enzymes ◽  
Ammonium Bromide ◽  
Selective Delignification ◽  
Cellulose Iβ ◽  
Hydrolysis Of

AbstractCellulolytic enzymes can readily access the cellulosic component of lignocellulosic biomass after the removal of lignin during biomass pretreatment. The enzymatic hydrolysis of cellulose is necessary for generating monomeric sugars, which are then fermented into ethanol. In our study, a combination of a deep eutectic (DE) mixture (of 2-aminoethanol and tetra-n-butyl ammonium bromide) and a cyclic ether (tetrahydrofuran) was used for selective delignification of rice straw (RS) under mild conditions (100 °C). Pretreatment with DE-THF solvent system caused ~ 46% delignification whereas cellulose (~ 91%) and hemicellulose (~ 67%) recoveries remained higher. The new solvent system could be reused upto 10 subsequent cycles with the same effectivity. Interestingly, the DE-THF pretreated cellulose showed remarkable enzymatic hydrolysability, despite an increase in its crystallinity to 72.3%. Contrary to conventional pretreatments, we report for the first time that the enzymatic hydrolysis of pretreated cellulose is enhanced by the removal of lignin during DE-THF pretreatment, notwithstanding an increase in its crystallinity. The current study paves way for the development of newer strategies for biomass depolymerization with DES based solvents.

Enzymatic Hydrolysis of Ammonia-Treated Rice Straw

2003 ◽  
Vol 105 (1-3) ◽  
pp. 155-164 ◽  
Author(s):  
Betzabé Sulbarán-De-Ferrer ◽  
Marielena Aristiguieta ◽  
Bruce E. Dale ◽  
Alexis Ferrer ◽  
Graciela Ojeda-De-Rodriguez
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Hydrolysis Of
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