Document Detail

Ferric sulphate catalysed esterification of free fatty acids in waste cooking oil.
MedLine Citation:
PMID:  20435468     Owner:  NLM     Status:  MEDLINE    
In this work, the esterification of free fatty acids (FFA) in waste cooking oil catalysed by ferric sulphate was studied as a pre-treatment step for biodiesel production. The effects of reaction time, methanol to oil ratio, catalyst concentration and temperature on the conversion of FFA were investigated on a laboratory scale. The results showed that the conversion of FFA reached equilibrium after an hour, and was positively dependent on the methanol to oil molar ratio and temperature. An optimum catalyst concentration of 2 wt.% gave maximum FFA conversion of 59.2%. For catalyst loadings of 2 wt.% and below, this catalysed esterification was proposed to follow a pseudo-homogeneous pathway akin to mineral acid-catalysed esterification, driven by the H(+) ions produced through the hydrolysis of metal complex [Fe(H(2)O)(6)](3+) (aq).
Suyin Gan; Hoon Kiat Ng; Chun Weng Ooi; Nafisa Osman Motala; Mohd Anas Farhan Ismail
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Bioresource technology     Volume:  101     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-06-21     Completed Date:  2010-10-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  7338-43     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Ltd. All rights reserved.
Department of Chemical and Environmental Engineering, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
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MeSH Terms
Fatty Acids, Nonesterified / metabolism*
Ferric Compounds / chemistry*
Methanol / chemistry
Plant Oils / chemistry*
Reproducibility of Results
Time Factors
Waste Products / analysis*
Reg. No./Substance:
0/Fatty Acids, Nonesterified; 0/Ferric Compounds; 0/Plant Oils; 0/Waste Products; 10028-22-5/ferric sulfate; 67-56-1/Methanol

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