Transesterification of waste cooking oil by heteropoly acid (HPA) catalyst: Optimization and kinetic model

Amin Talebian-Kiakalaieh, Nor Aishah Saidina Amin, Alireza Zarei, Iman Noshadi

Research output: Contribution to journalArticlepeer-review

163 Scopus citations


Transesterification of waste cooking oil with heterogeneous (heteropoly acid) catalyst and methanol has been investigated. Response Surface Methodology (RSM) and Artificial Neural Network (ANN) were employed to study the relationship between process variables and free fatty acid conversion and for predicting the optimal parameters. The highest conversion was 88.6% at optimum condition being 14h, 65°C, 70:1 and 10wt% for reaction time, reaction temperature, methanol to oil molar ratio and catalyst loading, respectively. The RSM and ANN could accurately predict the experimental results, with R2=0.9987 and R2=0.985, respectively. Kinetics studies were investigated to describe the system. The reaction followed first-order kinetics with the calculated activation energy, Ea=53.99kJ/mol while the pre-exponential factor, A=2.9×107min-1. These findings can help improve an environmentally friendly biodiesel process that conforms to ASTM D6751 standards.

Original languageEnglish (US)
Pages (from-to)283-292
Number of pages10
JournalApplied Energy
StatePublished - 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • General Energy
  • Management, Monitoring, Policy and Law
  • Building and Construction
  • Renewable Energy, Sustainability and the Environment


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