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 language | American English |
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Pages (from-to) | 1545-1549 |
Number of pages | 5 |
Journal | Topics in Catalysis |
Volume | 57 |
Issue number | 17-20 |
DOIs | |
State | Published - 1 Nov 2014 |
Keywords
- Biodiesel
- FFA
- Heterogeneous catalysis
- Sulfated zirconia
- Waste recycling
All Science Journal Classification (ASJC) codes
- General Chemistry
- Catalysis