Autocatalyzed and heterogeneously catalysed esterification kinetics of glycolic acid with ethanol

2021 ◽  
Author(s):  
Laura Reyes ◽  
Clémence Nikitine ◽  
Léa Vilcocq ◽  
Pascal Fongarland
Keyword(s):  
Reaction Kinetics ◽  
Chemical Equilibrium ◽  
Glycolic Acid ◽  
Esterification Reaction ◽  
Kinetics Of

The chemical equilibrium and reaction kinetics in homogeneously and heterogeneously catalyzed systems were investigated for the reversible esterification reaction of glycolic acid with ethanol. In a first approach, the thermodynamic...

Reaction kinetics of the esterification reaction between ethanol and acetic acid catalyzed by Keggin heteropolyacids

2013 ◽  
Vol 111 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Xiufeng Lu ◽  
Hengbo Yin ◽  
Lingqin Shen ◽  
Yonghai Feng ◽  
Aili Wang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reaction Kinetics ◽  
Esterification Reaction ◽  
Keggin Heteropolyacids ◽  
Acid Catalyzed ◽  
Kinetics Of

Esterification Reaction Kinetics of Acetic and Oleic Acids with Ethanol in the Presence of Amberlyst 15

2017 ◽  
Vol 43 (11) ◽  
pp. 5701-5709 ◽  
Author(s):  
Afeeq Shahid ◽  
Yousuf Jamal ◽  
Sher Jamal Khan ◽  
Jamshed Ali Khan ◽  
Bryan Boulanger
Keyword(s):  
Reaction Kinetics ◽  
Esterification Reaction ◽  
Amberlyst 15 ◽  
Kinetics Of

scholarly journals The Kinetics of Calcium Oxide Catalyzed Esterification of Glycerol with Free Fatty Acids Using Pseudo-homogeneous Model Approach

REAKTOR ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 1
Author(s):  
Megawati Megawati ◽  
Dhoni Hartanto ◽  
Catur Rini Widyastuti ◽  
Diyah Saras Wati ◽  
Eny Nurhayati
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Reaction Kinetics ◽  
Calcium Oxide ◽  
Homogeneous Model ◽  
Solid Catalyst ◽  
Esterification Reaction ◽  
Oxide Content ◽  
Reaction Constants ◽  
Kinetics Of

Abstract This research aims to study the reaction kinetics of esterification reaction of glycerol with free fatty acid (FFA) using calcium oxide catalyst to produce mono-diacylglycerol (MDAG) using pseudo-homogeneous approach. The effects of time and temperature on the reaction conversion were investigated simultaneously. The FFA used was from the waste of cocoa production process, while the solid catalyst used was calcium oxide from eggshell ash. The results show that the cocoa based FFA was composed of palmitic acid (49.24%), methyl stearate (1.05%), oleic acid (25.39%), and stearic acid (24.32%). The calcium oxide content in the eggshell ash was 60% w/w. At all temperatures studied (60, 70, and 80oC), as the reaction time increased, the conversion increased sharply in the first 5 minute followed by a gradual raise to an almost constant value after 20 minutes (0.844; 0.845; and 0.854, respectively). Pseudo-homogeneous second order model can describe the reaction kinetics satisfactorily. The reaction constants (k) at 60, 70, and 80oC were 0.00384, 0.003401, and 0.003518 (L/mole.minute), respectively. The effects of temperature on reaction rate obey the Arrhenius’ equation with collision factor (A) is 0.2659 (L/mole.minute) and activation energy (Ea) is 3544 J/mol. Keywords: calcium oxide; free fatty acid; glycerol; pseudo-homogeneous approach

Esterification reaction kinetics of acetic acid and n‐pentanol catalyzed by sulfated zirconia

2020 ◽  
Vol 52 (8) ◽  
pp. 499-512 ◽  
Author(s):  
Fabiane Hamerski ◽  
Giovana Gonçalves Dusi ◽  
Julia Trancoso Fernandes dos Santos ◽  
Vítor Renan da Silva ◽  
Fernando Augusto Pedersen Voll ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reaction Kinetics ◽  
Sulfated Zirconia ◽  
Esterification Reaction ◽  
Kinetics Of

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

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