여영구
2017-02-27T00:24:39Z
2017-02-27T00:24:39Z
2015-06
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, v. 47, NO 8, Page. 489-500
0538-8066
1097-4601
http://onlinelibrary.wiley.com/doi/10.1002/kin.20926/full
http://hdl.handle.net/20.500.11754/25678
In this work, the reaction scheme for the esterification of palm fatty acid distillate performed under the noncatalytic and high-temperature condition (230-290 degrees C) was investigated with a rigorous mathematical modeling. The esterification reaction was assumed to be the pseudo-homogeneous second-order reversible reaction, and the mass transfer effectiveness factor () was introduced in the modeling framework to systematically and collectively consider both evaporation and reaction, which are simultaneously and competitively occurred in the liquid phase. The nonlinear programming problem was constructed with the objective function consisting of the errors between experimental data and the estimated values from the reaction model. The problem was solved by using the Nelder-Mead simplex algorithm to identify kinetic parameters, reaction rate constants, and mass transfer coefficients. The values of mass transfer coefficients were found to follow the Hertz-Knudsen relation and expressed as a function of reaction temperature. From the reaction rate constants obtained from the proposed kinetic models, the apparent activation energy was estimated to be 43.98 kJ/mol, which is lower than the value obtained from the reaction using heterogeneous catalysts. This low value indicates that reactants and products behave as an acid catalyst at relatively high operating temperature and constant pressure. (C) 2015 Wiley Periodicals, Inc.
This work is the outcome of a Manpower Development Program for Energy & Resources supported by the Ministry of Knowledge and Economy (MKE). This work was also supported in part by the Korea Research Foundation Grant (2010-0007152). The authors wish to thank them for their support.
en
WILEY-BLACKWELL
BIODIESEL PRODUCTION
CATALYZED PROCESS
METHANOL
OIL
TRANSESTERIFICATION
PFAD
CONSTANT
WATER
A Kinetic Study for the Noncatalytic Esterification of Palm Fatty Acid Distillate
Article
8
47
10.1002/kin.20926
489-500
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
Hong, Seok Won
Cho, Hyun Jun
Kim, Jin-Kuk
Ahmed, Faisal
Yeo, Yeong-Koo
2015002810
S
COLLEGE OF ENGINEERING[S]
DEPARTMENT OF CHEMICAL ENGINEERING
ykyeo