Kinetics of Cellulose Hydrolysis in an Oscillatory Baffled Reactor

2016 ◽  
Author(s):  
Joseph Ikwebe ◽  
Adam Harvey
Keyword(s):  
Cellulose Hydrolysis ◽  
Kinetics Of

scholarly journals Enzyme kinetics of cellulose hydrolysis

1989 ◽  
Vol 262 (3) ◽  
pp. 1001-1001 ◽  
Author(s):  
C J Bailey
Keyword(s):  
Enzyme Kinetics ◽  
Cellulose Hydrolysis ◽  
Kinetics Of

scholarly journals Stochastic modelling of cellulose hydrolysis with Gauss and Weibull distributed transition probabilities

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Joseph Mcgreg Duru ◽  
Oana Cristina Pârvulescu ◽  
Tănase Dobre ◽  
Cristian Eugen Răducanu
Keyword(s):  
Acid Hydrolysis ◽  
Stochastic Models ◽  
Transition Probabilities ◽  
Stochastic Modelling ◽  
Cellulose Hydrolysis ◽  
Process Conditions ◽  
Hydrolysis Of Cellulose ◽  
Model Equations ◽  
Kinetics Of ◽  
Hydrolysis Of

AbstractTwo Markov-type stochastic models were developed to describe the kinetics of acid hydrolysis of cellulose. One of them involved a Gauss (normal) distribution of probabilities of chemical bond breaking, the other a Weibull distribution. It was considered that the random breaking of cellulose was based on the cleavage of a parent macromolecule into two descendants. Model equations and kinetics of acid hydrolysis of cellulose consisting of 10 and 100 units of cellobiose were presented. The effects of acid concentration and temperature on the kinetics of hydrolysis process were taken into account. The results obtained applying both stochastic models were in a reasonable agreement with those obtained using a deterministic kinetic model. These stochastic models can accurately describe the kinetics of acid hydrolysis and cover the drawbacks of some deterministic kinetic models, e.g., large number of model equations and parameters, modification of parameter values by changing the process conditions.

scholarly journals Kinetics of sulfur dioxide-alcohol-water (SAW) pulping of sugarcane straw (SCS)

TAPPI Journal ◽  
2017 ◽  
Vol 16 (06) ◽  
pp. 313-328 ◽  
Author(s):  
ASIF MASIH SHARAZI ◽  
ADRIAAN VAN HEININGEN
Keyword(s):  
Sulfur Dioxide ◽  
Lignin Content ◽  
Cellulose Hydrolysis ◽  
Solvent System ◽  
Kappa Number ◽  
Hydrolysis Rate ◽  
Sugarcane Straw ◽  
Linear Relationships ◽  
Alcohol Water ◽  
Kinetics Of

Pulping kinetics of sugarcane straw (SCS) using the sulfur dioxide (SO2)-alcohol-water (SAW) system were investigated with different solvents (methanol, ethanol, and isopropanol) in order to evaluate the effect of the solvents. The methanol, ethanol, and isopropanol SAW pulps are identified as SMW, SEW, and SPW, respectively. The pulping experiments were carried out at 135°C, 145°C, and 155°C with cooking liquor (L/F = 4 L/kg feedstock) composition; SO2/alcohol/water of 12/44/44 w%. The pulps were characterized in terms of yield, kappa number, viscosity, cellulose, and hemicellulose and lignin content. After a fast initial dissolution phase, two regimes of delignification were identified in all solvent systems: a bulk and a residual phase. Bulk delignification and xylan removal followed first order kinetics in residual lignin and xylan, respectively, while the cellulose hydrolysis rate was zeroth order in cellulose. Linear relationships between Klason lignin content and kappa number were developed for each solvent system after correcting the acid insoluble lignin for ash and non-oxidizable matter. The corrected lignin content on original SCS was used to develop the bulk delignification kinetics. Rate constants and activation energies for bulk delignification, xylan removal, and cellulose hydrolysis were evaluated for each pulping system. In terms of degree of delignification, the pulping systems followed the sequence of: SMW <SEW <SPW. Bleachable grade pulps with acceptable intrinsic viscosity (>800 ml/g) were produced in SEW and SPW systems, while the lower rate of delignification and higher rate of cellulose hydrolysis in SMW yielded much lower viscosity pulps of higher kappa number at the same pulping temperature and time. The results are explained in terms of the effective acidity and lignin/carbohydrate dissolution properties of the pulping liquors.

scholarly journals Enzyme kinetics of cellulose hydrolysis of Miscanthus and oat hulls

3 Biotech ◽  
2017 ◽  
Vol 7 (5) ◽  
Author(s):  
Ekaterina I. Makarova ◽  
Vera V. Budaeva ◽  
Aleksey A. Kukhlenko ◽  
Sergey E. Orlov
Keyword(s):  
Enzyme Kinetics ◽  
Cellulose Hydrolysis ◽  
Oat Hulls ◽  
Kinetics Of ◽  
Hydrolysis Of

Modeling Intrinsic Kinetics of Enzymatic Cellulose Hydrolysis

2008 ◽  
Vol 23 (3) ◽  
pp. 626-637 ◽  
Author(s):  
Suma Peri ◽  
Srinivas Karra ◽  
Y. Y. Lee ◽  
M. Nazmul Karim
Keyword(s):  
Cellulose Hydrolysis ◽  
Intrinsic Kinetics ◽  
Kinetics Of
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