Table 3.

Composition of the waste cooking oil feedstock and the product mixture of each catalytic process SiO₃-SO₃H/(Buⁿ₄N)(BF₄), SiO₂-SO₃H/Aliquat 336, and SiO₃-SO₃H involving methanol in refluxing DMSO.

	SiO2-SO3H/(Bun4N)(BF4)		SiO2-SO3H/Aliquat 336		SiO2-SO3H
Assay	Result (% w/w)	Standard Deviation	Result (% w/w)	Standard Deviation	Result (% w/w)	Standard Deviation
FAME	98.40	3.10	86.35	3.38	99.51	2.94
Free glycerol	0.01	0,01	0.04	0.01	0.01	0.01
Total glycerol	0.29	0.07	2.16	0.08	0.09	0.07
Monoacylglycerol	0.86	0.27	4.87	0.29	0.28	0.26
Diacylglycerol	0.37	0.12	4.00	0.13	0.07	0.12
Triacylglycerol	0.09	0.26	0.35	0.28	0.02	0.25