Record Details

Concentration-independent rate constant for biodiesel synthesis from homogeneous-catalytic esterification of free fatty acid

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Concentration-independent rate constant for biodiesel synthesis from homogeneous-catalytic esterification of free fatty acid
 
Creator HASSAN, SZ
VINJAMUR, M
 
Subject Concentration-independent rate constant
Taguchi method
Biodiesel
Esterification
Free fatty acid
ION-EXCHANGE-RESINS
WASTE COOKING OIL
OLEIC-ACID
SUNFLOWER OIL
ACETIC-ACID
KINETICS
METHANOL
EQUILIBRIUM
ALCOHOL
TRANSESTERIFICATION
 
Description Dependence of the second-order rate constant (SRC) on the reactants' concentration, for esterification or Fatty acids, is found empirically in the published reports. Taguchi method is used to study dependency of the rate constant on temperature, reactants' concentration, and catalyst loading for the synthesis of biodiesel from sulfuric acid-catalyzed esterification of free fatty acid (ETA) with methanol. On the basis of general literature on dependency of rate constant on reactants' concentration and the esterification-rate determining step, concentration term embedded in the units of SRC has been identified as catalyst concentration. Accordingly SRC has been modified to include the catalyst concentration in the rate law, which is consistent with the general mass-action rate law reported by Blum and bus (1964) and Pikar (2011). Analysis of the modified rate constant showed it to be independent of the reactants' concentration, It is thus named as 'concentration independent rate constant (ClRC)'. The predictions of kinetics of the esterification of FFA are better using CIRC than other commonly used rate forms. The modified rate constant is shown to be equivalent to Bronsted-Bjerrum relation. Moreover, the modified rate constant is more general than the reported ones for esterification of fatty acids and it predicts kinetics well over a wide range of reaction parameters. (C) 2014 Elsevier Ltd. All rights reserved,
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-28T17:01:54Z
2014-12-28T17:01:54Z
2014
 
Type Article
 
Identifier CHEMICAL ENGINEERING SCIENCE, 107290-301
0009-2509
1873-4405
http://dx.doi.org/10.1016/j.ces.2013.12.022
http://dspace.library.iitb.ac.in/jspui/handle/100/16951
 
Language English