Effect of acid catalyst on structural transformation and hydrolysis of cellulose in hydrothermal conditions

2008 ◽  
Vol 10 (6) ◽  
pp. 623 ◽  
Author(s):  
Shigeru Deguchi ◽  
Kaoru Tsujii ◽  
Koki Horikoshi
Keyword(s):  
Structural Transformation ◽  
Acid Catalyst ◽  
Hydrothermal Conditions ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

The Effect of Dicarboxylic Acid Catalyst Structure on Hydrolysis of Cellulose Model Compound D-Cellobiose in Water

2021 ◽  
Vol 08 ◽  
Author(s):  
Harshica Fernando ◽  
Ananda S. Amarasekara
Keyword(s):  
Dicarboxylic Acid ◽  
Model Compound ◽  
Acid Catalyst ◽  
Catalytic Activities ◽  
Polycarboxylic Acids ◽  
Hydrolysis Of Cellulose ◽  
Phthalic Acids ◽  
Turn Over Frequency ◽  
Turn Over ◽  
Hydrolysis Of

Background: Polycarboxylic acids are of interest as simple mimics for cellulase enzyme catalyzed depolymerization of cellulose. In this study, DFT calculations were used to investigate the effect of structure on dicarboxylic acid organo-catalyzed hydrolysis of cellulose model compound D-cellobiose to D-glucose. Methods: Binding energy of the complex formed between D-cellobiose and acid (Ebind), as well as glycosidic oxygen to dicarboxylic acid closest acidic H distance were studied as key parameters affecting the turn over frequency of hydrolysis in water. Result: α-D-cellobiose - dicarboxylic acid catalyst down face approach showed high Ebind values for five of the six acids studied; indicating the favorability of down face approach. Maleic, cis-1,2-cyclohexane dicarboxylic, and phthalic acids with the highest catalytic activities showed glycosidic oxygen to dicarboxylic acid acidic H distances 3.5-3.6 Å in the preferred configuration. Conclusion: The high catalytic activities of these acids may be due to the rigid structure, where acid groups are held in a fixed geometry.

Hydrolysis of Cellulose by a Solid Acid Catalyst under Optimal Reaction Conditions

2009 ◽  
Vol 113 (8) ◽  
pp. 3181-3188 ◽  
Author(s):  
Daizo Yamaguchi ◽  
Masaaki Kitano ◽  
Satoshi Suganuma ◽  
Kiyotaka Nakajima ◽  
Hideki Kato ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Reaction Conditions ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of ◽  
Optimal Reaction

scholarly journals Sulfonic-acid-functionalized carbon fiber from waste newspaper as a recyclable carbon based solid acid catalyst for the hydrolysis of cellulose

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 28902-28907 ◽  
Author(s):  
Runming Gong ◽  
Zihao Ma ◽  
Xing Wang ◽  
Ying Han ◽  
Yanzhu Guo ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Sulfonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Cellulosic Materials ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of ◽  
Carbon Based

Waste newspaper is one of the most common cellulosic materials.

PENGARUH KONSENTRASI KATALIS ASAM DAN KECEPATAN PENGADUKAN PADA HIDROLISIS SELULOSA DARI AMPAS BATANG SORGUM MANIS

EKUILIBIUM ◽  
2013 ◽  
Vol 12 (1) ◽  
Author(s):  
Enny Kriswiyanti
Keyword(s):  
Hydrochloric Acid ◽  
Sweet Sorghum ◽  
Reaction Rate ◽  
Acid Catalyst ◽  
Agitation Speed ◽  
First Order ◽  
Reaction Rate Constants ◽  
Glucose Levels ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

<p>Abstract : Sweet sorghum stem residues contains high enough cellulose (36.92%)so it can be<br />hydrolyzed to glucose. In this research, hydrolysis of cellulose is carried out using hydrochloric<br />acid catalyst. This research aims to determine the effect of acid catalyst concentration and<br />agitation speed on the resulting reduction of glucose levels and determine the reaction rate<br />constant of hydrolysis of sweet sorghum stem residues. The observed variables were the<br />concentration of hydrochloric acid catalyst (0.5 N, 1 N, 1.5 N, 2 N) and the agitation speed (150<br />rpm, 200 rpm, 250 rpm, 300 rpm). Glucose samples were analyzed by using the Lane-Eynon<br />method. Data analysis showed the higher concentration of hydrochloric acid (HCl) and the<br />agitation speed, the levels of reduced glucose that is formed is also higher. In this study by<br />assuming a first order reaction, the reaction rate constants obtained at variable concentrations of<br />hydrochloric acid catalyst ranged from 0.0010 to 0.0033 / minute and at agitation speeds variable<br />ranged from 0.0023 to 0.0030 / minute.<br />Keywords : sweet sorghum stem residues, hydrochloric acid, hydrolysis, cellulose</p>

scholarly journals A SYNTHESIS OF SOLID ACID CATALYSTS FOR USING IN HYDROLYSIS OF CELLULOSE FROM RICE STRAW INTO GLUCOSE

2018 ◽  
Vol 55 (1B) ◽  
pp. 145
Author(s):  
T-Que Phuong Phan
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Hydrothermal Carbonization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrolysis Of Cellulose ◽  
Ft Ir ◽  
Physical And Chemical ◽  
Hydrolysis Of

In this study, a carbon–based solid acid catalyst was prepared via hydrothermal carbonization method (HTC) using glucose and pyrolysed waste tyre as carbon precursors and aqueous solution of H2SO4 as sulfonation agent. Prepared catalysts were characterized by X–ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared FT–IR and Brunauer–Emmett–Teller (BET). As the result, catalysts were manufactured with the appropriate physical and chemical characteristics and high acidity.

Sign in / Sign up

Export Citation Format

Share Document