One-step production of biodiesel from rice bran oil catalyzed by chlorosulfonic acid modified zirconia via simultaneous esterification and transesterification

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58 Citations (Scopus)


Due to the high content (25-50%) of free fatty acid (FFA), crude rice bran oil usually requires a two steps conversion or one step conversion with very harsh condition for simultaneous esterification and transesterification. In this study, chlorosulfonic acid modified zirconia (HClSO3-ZrO2) with strong acidity and durability is prepared and it shows excellent catalytic activity toward simultaneous esterification and transesterification. Under a relative low reaction temperature of 120°C, HClSO3-ZrO2catalyzes a complete conversion of simulated crude rice bran oil (refined oil with 40wt% FFA) into biodiesel and the conversion yield keep at above 92% for at least three cycles. Further investigation on the tolerance towards FFA and water reveals that it maintains high activity even with the presence of 40wt% FFA and 3wt% water. It shows that HClSO3-ZrO2is a robust and durable catalyst which shows high potential to be commercial catalyst for biodiesel production from low grade feedstock.
Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalBioresource Technology
Publication statusPublished - 1 Jan 2013


  • Biodiesel
  • Chlorosulfonic acid
  • Rice bran oil
  • Simultaneous esterification and transesterification
  • Sulfated zirconia

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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