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Two step biodiesel production from Calophyllum inophyllum oil: Studies on thermodynamic and kinetic modelling of modified β‐zeolite catalysed pre‐treatment
Author(s) -
Sathyaselvabala Vasanthakumar,
Ponnusamy Senthilkumar,
Periyaraman Premkumar Manickam,
Selvaraj Dinesh Kirupha,
Thangaraj Vidhyadevi,
Subramanian Sivanesan
Publication year - 2012
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20603
Subject(s) - biodiesel , catalysis , methanol , chemistry , zeolite , biodiesel production , arrhenius equation , endothermic process , reaction rate constant , phosphoric acid , adsorption , kinetics , reaction rate , transesterification , thermodynamics , chemical engineering , organic chemistry , activation energy , physics , quantum mechanics , engineering
Biodiesel is one of the alternative fuels that can help in reducing oil dependence. β‐Zeolite was modified with phosphoric acid and the modified β‐zeolite was used as catalyst for the esterification of free fatty acids (FFA) present in pinnai oil and its effect on esterification reaction was studied. Influence of catalyst amount, methanol to oil ratio and temperature on specific reaction rate was modelled using Langmuir–Hinshelwood (LH) kinetics, pseudo first order kinetics and Arrhenius equation, respectively. The kinetic constant values obtained in LH kinetics show that the adsorption capacity of FFA on catalyst surface was approximately 23 times higher than that of methanol. From pseudo first order kinetic modelling it is found that methanol to oil molar ratio of 9 gives the optimum k value. Thermodynamic studies were also performed to prove the endothermic nature of Pβ catalysed esterification reaction. © 2011 Canadian Society for Chemical Engineering