Glycerol Esters from Real Waste Cooking Oil Using a Robust Solid Acid Catalyst

Venkatesh Subbiah, Peter Van Zwol, Alexandre C. Dimian, Vitaly Gitis, Gadi Rothenberg

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Notwithstanding the food-for-fuel debate, turning waste cooking oil and fat (WCO) into a valuable product is a classic example of green chemistry. We demonstrate that sulfated zirconia and lanthanum-supported sulfated zirconia are good catalysts for the esterification of WCO free fatty acids (FFAs) with glycerol, giving high-value monoglycerides. Various catalysts were first screened using palmitic acid as a model FFA. Subsequently, six 10-kg batches of actual WCO were collected from commercial cookeries over a period of 28 weeks, pre-treated in a purpose-built decanter and esterified with industrial grade glycerol using heterogeneous catalysis. Good yield and turnovers were obtained. The pre-treatment stage and the catalytic esterification experiments are described and discussed.

    Original languageAmerican English
    Pages (from-to)1545-1549
    Number of pages5
    JournalTopics in Catalysis
    Volume57
    Issue number17-20
    DOIs
    StatePublished - 1 Nov 2014

    Keywords

    • Biodiesel
    • FFA
    • Heterogeneous catalysis
    • Sulfated zirconia
    • Waste recycling

    All Science Journal Classification (ASJC) codes

    • General Chemistry
    • Catalysis

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