Kinetic Model of Catalytic Self-Condensation of Cyclohexanone over Amberlyst 15

2014 ◽  
Vol 53 (49) ◽  
pp. 19117-19127 ◽  
Author(s):  
David Lorenzo ◽  
Ernesto Simón ◽  
Aurora Santos ◽  
Arturo Romero
Keyword(s):  
Kinetic Model ◽  
Amberlyst 15

scholarly journals A Simple Pseudo-Homogeneous Reversible Kinetic Model for the Esterification of Different Fatty Acids with Methanol in the Presence of Amberlyst-15

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1843 ◽  
Author(s):  
Mauro Banchero ◽  
Giuseppe Gozzelino
Keyword(s):  
Fatty Acids ◽  
Kinetic Model ◽  
Niobium Oxide ◽  
Catalytic Mechanism ◽  
Saturated Fatty Acids ◽  
Industrial Process ◽  
Main Reaction ◽  
Kinetic Behavior ◽  
Amberlyst 15 ◽  
Biodiesel Synthesis

Fatty acid esterification with alcohols is a crucial step in biodiesel synthesis. Biodiesel consists of long-chain alkyl esters that derive from the transesterification or hydro-esterification of the triglycerides that are contained in vegetable oils. In the first route, the esterification of the free fatty acids is an important pretreatment of the feed; in the second, it is the main reaction of the industrial process. Knowledge of appropriate kinetic models for the catalytic esterification of fatty acids with alcohols is critical in the design of biodiesel synthesis processes. In this work, the kinetic behavior of the reversible esterification of lauric, myristic, palmitic and stearic acid, which are the most common saturated fatty acids that are contained in triglyceride feedstocks for biodiesel, with methanol at different temperatures (70–150 °C) and molar ratios of the reactants (1:1–1:2–1:5) was investigated in a batch laboratory basket reactor both in the presence and absence of Amberlyst-15 as the catalyst. Results obtained with Amberlyst-15 were fitted through a ready-to-use pseudo-homogeneous reversible model suitable for process design. The kinetic model was compared with that obtained in a previous work with niobium oxide as the catalyst. With respect to the results that were obtained with niobium oxide, the influence of the chain length of the acid on the kinetic behavior was strongly reduced in the presence of Amberlyst-15. This phenomenon was ascribed to a different catalytic mechanism.

scholarly journals Solketal Production by Glycerol Acetalization Using Amberlyst-15 Catalyst

2020 ◽  
Vol 20 (1) ◽  
pp. 67
Author(s):  
Hary Sulistyo ◽  
Edwin Nur Huda ◽  
Tri Sarifah Utami ◽  
Wahyudi Budi Sediawan ◽  
Suprihastuti Sri Rahayu ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Cetane Number ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Fuel Additive ◽  
Stirrer Speed ◽  
Glycerol Conversion ◽  
Amberlyst 15 ◽  
Operation Conditions

Glycerol, as a by-product of biodiesel production, has recently increased due to the rapid growth of the biodiesel industry. Glycerol utilization is needed to increase the added value of glycerol. Glycerol can be converted to solketal, which can be used as a green fuel additive to enhance an octane or cetane number. Conversion of glycerol to solketal was conducted via acetalization reaction with acetone using amberlyst-15 as the catalyst. The objective of present study was to investigate the effect of some operation conditions on glycerol conversion. Furthermore, it also aimed to develop a kinetic model of solketal synthesis with amberlyst-15 resins. The experiment was conducted in a batch reactor, equipped with cooling water, thermometer, stirrer, and a water bath. The variables that have been investigated in the present work were reaction temperature, reactants molar ratio, catalyst loading, and stirrer speed for 3 hours of reaction time. Temperatures, reactants molar ratio, and stirrer speed appeared to have a significant impact on glycerol conversion, where the higher values led to higher conversion. On the other hand, in the presence of catalyst, the increase of catalyst loading has a less significant impact on glycerol conversion. The results showed that the highest glycerol conversion was 68.75%, which was obtained at 333 K, the reactant’s molar ratio was  4, the amount of catalyst was 1 wt%, and stirrer speed of 500 rpm. Based on the pseudo-homogeneous kinetic model, the resulting kinetic model suitable for this glycerol capitalization. The value of parameters k and Ea were 1.6135 108 min-1 and 62.226 kJ mol-1,respectively. The simulation model generally fits the experimental data reasonably well in the temperature range of 313-333 K.

scholarly journals Kinetic Studies of the Glycerolysis of Urea to Glycerol Carbonate in the Presence of Amberlyst-15 as Catalyst

2021 ◽  
Vol 16 (1) ◽  
pp. 52-62
Author(s):  
Hary Sulistyo ◽  
Wahyudi Budi Sediawan ◽  
Reviana Inda Dwi Suyatno ◽  
Indah Hartati
Keyword(s):  
Kinetic Model ◽  
Active Sites ◽  
Outer Part ◽  
Kinetic Studies ◽  
Order Reaction ◽  
Second Order ◽  
Glycerol Carbonate ◽  
Glycerol Concentration ◽  
Second Order Reaction ◽  
Amberlyst 15

Amberlyst-15, a strong acidic ion-exchange resin, has showed as a potential and an effective catalyst for the glycerolysis process of urea to glycerol carbonate. In this work, the kinetic model of the urea glycerolysis over Amberlyst-15 catalyst was investigated. The kinetic model was developed by considering simultaneous steps of urea dissolution in glycerol, mass transfer of urea and glycerol from the bulk of the liquid into the outer part of the catalyst, diffusion of urea and glycerol into the inner part of the particle through the catalyst pores, and irreversible second order reaction of urea and glycerol on the active sites. The irreversibility of second order reaction of urea glycerolysis was validated and proven. The proposed kinetic model was simulated and validated with the experimental data. The kinetic studies show that mechanism proposed works well. Furthermore, the activation energy was found to be 145.58 kJ.mol−1 and the collision factor was in 8.00×1010 (m3)2.kg−1.mol−1.s−1. The simulation result shows that the predicted liquid temperatures were close to the experimental temperature data. It also gave glycerol concentration profile inside the catalyst particle as a function of glycerolysis time and position. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 

A kinetic model of the Amberlyst-15 catalyzed transesterification of methyl stearate with n-butanol

2011 ◽  
Vol 102 (5) ◽  
pp. 4270-4272 ◽  
Author(s):  
Venkata K.S. Pappu ◽  
Abraham J. Yanez ◽  
Lars Peereboom ◽  
Evan Muller ◽  
Carl T. Lira ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Methyl Stearate ◽  
Amberlyst 15

scholarly journals Kinetics Modeling of Glycerol Carbonate Synthesis from Glycerol and Urea over Amberlyst-15 Catalyst

2019 ◽  
Vol 19 (4) ◽  
pp. 1066
Author(s):  
Hary Sulistyo ◽  
Sabariyanto Sabariyanto ◽  
Muhammad Noor Ridho Aji ◽  
Muhammad Mufti Azis
Keyword(s):  
Experimental Data ◽  
Kinetic Model ◽  
Experimental Result ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Glycerol Carbonate ◽  
Green Solvent ◽  
Glycerol Conversion ◽  
Exponential Factor ◽  
Amberlyst 15

Synthesize of glycerol carbonate from glycerol and urea is an attractive path as glycerol carbonate has a large potential as a green solvent. The aim of the present study was to develop a kinetic model of glycerol carbonate synthesis with amberlyst-15 resins as a catalyst. The investigation was carried out at various temperatures from 353 to 383 K and catalyst loading from 0.25 to 1 wt.% of glycerol. The experimental results indicated that both temperature and catalyst loading have an important effect on the glycerol conversion. According to the experimental result, the highest glycerol conversion was found 36.90% which was obtained using a molar ratio of urea to glycerol 1:3, catalyst loading of 1 wt.%, stirrer speed of 700 rpm, the temperature of 383 K and reaction time of 5 h. A kinetic model was developed based on elementary steps that take place over the catalyst. The model estimated that the pre-exponential factor was 2.89.104 mol.g–1.min–1 and the activation energy was 50.5 kJ.mol–1. By comparing the simulation and experimental data, it could be inferred that the model could predict the trend of experimental data well over the range of temperature and catalyst loading investigated in the present study.

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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