Kinetic model for the increase of reaction order during polyesterification

2004 ◽  
Vol 43 (12) ◽  
pp. 1487-1493 ◽  
Author(s):  
Tapio Salmi ◽  
Erkki Paatero ◽  
Per Nyholm
Keyword(s):  
Kinetic Model ◽  
Reaction Order

scholarly journals Kinetic study on iso-concentration hydrogen peroxide bleaching of poplar chemi-thermomechanical pulp by the process of continuous chemical supplement

BioResources ◽  
2018 ◽  
Vol 13 (3) ◽  
pp. 5408-5415
Author(s):  
Xianqi Sun ◽  
Qingxi Hou ◽  
Haizhen Shi ◽  
Lichun Zhou
Keyword(s):  
Kinetic Model ◽  
Initial Phase ◽  
Reaction Rate ◽  
Reaction Order ◽  
Slow Phase ◽  
Thermomechanical Pulp ◽  
Bleaching Process ◽  
Peroxide Bleaching ◽  
Bleached Pulp ◽  
Continuous Chemical

In the authors’ previous studies, a bleaching process based on continuous chemical supplementation (CCS) was proposed to improve the effectiveness of peroxide bleaching of chemi-thermomechanical pulp (CTMP). In this study, the kinetic model of the CCS process of peroxide bleaching was applied to poplar CTMP to explore how the bleaching rate was affected. The model was based on the rate of chromophore elimination characterized by the brightness gains of bleached pulp. The reaction rate of chromophore destruction proceeded via a rapid initial phase followed by a slow phase. The equation of reaction rate was confirmed. The value of reaction order was -3.62, and the activation energy was 288.8 kJ/mol. The developed kinetic model was a good fit for the experimental results.

Mean-field study of the synergic effect of the CO–NO reaction on a heterogeneous substrate of interconnected sectors

2010 ◽  
Vol 88 (4) ◽  
pp. 383-392
Author(s):  
Joaquín Cortés ◽  
Eliana Valencia
Keyword(s):  
Field Theory ◽  
Activation Energy ◽  
Kinetic Model ◽  
Bimetallic Catalyst ◽  
Reaction Order ◽  
Mean Field Theory ◽  
Mean Field ◽  
Reduction Reaction ◽  
Synergic Effect ◽  
Heterogeneous Catalytic

A mean-field theory study is made of the behaviour of a kinetic model of the reduction reaction of NO by CO catalyzed by a surface with simple heterogeneity consisting of two interconnected sectors that differ in their NO dissociation activation energy. A synergistic effect is manifested in the activity, apparent activation energy, and reaction order of the system. This situation, analogous to that observed in the literature in the case of a heterogeneous catalytic particle, is used in the paper to analyze a real case of a bimetallic catalyst.

scholarly journals The Prediction of CMDB Propellant lifetime Based on Arrhenius accelerated model, Berthelot’s equation and Multi-step Prout-Tompkins Model

2021 ◽  
Vol 2083 (3) ◽  
pp. 032018
Author(s):  
Qiong Wang ◽  
Yan Gu ◽  
Jiao Jiao Du ◽  
Lin Jia ◽  
Lin Jun Zhang
Keyword(s):  
Kinetic Model ◽  
General Model ◽  
Reaction Order ◽  
Accelerated Aging ◽  
Original Data ◽  
Lifetime Estimation ◽  
Vital Parameter ◽  
Safe Storage

Abstract Different models were provided to predict the storage lifetime of propellants more accurately. The stabilizer was recognized as a vital parameter for double based propellants’ storage lifetime estimation. The stabilizer contents of a certain RDX-CMDB propellant were traced during the accelerated aging tests. Based on that, the safe storage lifetime of this propellant were predicted using the Berthelot’s equation, Arrhenius accelerated equation and the advanced kinetic model, respectively. The predicted results were compared and the causes were analysed. It found that the biggest disadvantage of Berthelot’s equation and Arrhenius accelerated equation is that the predicted results are significantly affected by the original data. In details, the minor difference of original data will bring tremendous errors when extrapolating to normal temperature. The general model which can be used to depict complex reactions adopted in AKTS software was preferred compared to reaction order (RO) model and Prout-Tompkins (PT) model.

Studies on Curing Kinetics of Epoxy Resin / Modified Amine System

2013 ◽  
Vol 652-654 ◽  
pp. 121-126 ◽  
Author(s):  
Dong Bo Guan ◽  
Zhong Yi Cai ◽  
Xiao Jie Zhai ◽  
Wei Guo Yao ◽  
Shou Jun Wang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Kinetic Model ◽  
Epoxy Resin ◽  
Reaction Kinetic ◽  
Reaction Order ◽  
Curing Kinetics ◽  
Curing Conditions ◽  
Reaction Kinetic Model ◽  
Amine System ◽  
Kinetics Of

In this paper, E51 epoxy resin with 1050B modified polyamine and 1055B Modified polyamide was studied by non-isothermal DSC, and then we use Kissinger and Ozawa methods to calculate the activation energy and reaction order n, obtained its curing reaction kinetic model, and the reaction is a complicated reaction, at last we determine the E51 epoxy resin and 1050B modified polyamine / 1055B Modified polyamide curing conditions.

A KINETIC MODEL FOR THE CRYSTAL VIOLET MINERALIZATION IN WATER BY THE ELECTRO- FENTON PROCESS

2008 ◽  
Vol 7 (1) ◽  
pp. 9-12 ◽  
Author(s):  
Ilie Siminiceanu ◽  
Carmen-Ionela Alexandru ◽  
Eric Brillas
Keyword(s):  
Kinetic Model ◽  
Crystal Violet ◽  
Fenton Process

Achieving Procedure of a Kinetic Model to Predict the Influence of the Process Global Temperature on a Technological Alcoholic Fermentation II. An Arrhenius type Kinetic Model

2008 ◽  
Vol 59 (4) ◽  
Author(s):  
Neculai Catalin Lungu ◽  
Maria Alexandroaei
Keyword(s):  
Experimental Data ◽  
Saccharomyces Cerevisiae ◽  
Kinetic Model ◽  
Economic Efficiency ◽  
Fermentation Process ◽  
Alcoholic Fermentation ◽  
Global Temperature ◽  
Medium Temperature ◽  
Biotechnological Process

The aim of the present work is to offer a practical methodology to realise an Arrhenius type kinetic model for a biotechnological process of alcoholic fermentation based on the Saccharomyces cerevisiae yeast. Using the experimental data we can correlate the medium temperature of fermentation with the time needed for a fermentation process under imposed conditions of economic efficiency.

Five-Lump Kinetic Model for the Catalytic Cracking Process\

2018 ◽  
Vol 69 (10) ◽  
pp. 2633-2637
Author(s):  
Raluca Dragomir ◽  
Paul Rosca ◽  
Cristina Popa
Keyword(s):  
Kinetic Model ◽  
Programming Language ◽  
Catalytic Cracking ◽  
Computational Method ◽  
Industrial Data ◽  
New Model ◽  
Optimization And Control ◽  
Cracking Process ◽  
And Control ◽  
Matlab Programming

The main objectives of the present paper are to adaptation the five-kinetic model of the catalytic cracking process and simulation the riser to predicts the FCC products yields when one of the major input variable of the process is change. The simulation and adaptation are based on the industrial data from Romanian refinery. The adaptation is realize using a computational method from Optimization Toolbox from Matlab programming language. The new model can be used for optimization and control of FCC riser.

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