Table 4 Esterification of Oleic acid and rice bran oil have been performed with glycerol (3:1) in the presence of SiO2-TiO2 and SiO2-Al2O3(6 h; T = 200 °C, catalyst = 2 % by weight, 84 % FFAs, 16 % triglycerides)
Catalyst | Substrate | Starting FFAs (%) | Final FFAs (%) | Conv (%) | |
|---|---|---|---|---|---|
1 | SiO2-TiO2 | Oleic acid | 100 | 5.0 | 95.0 |
2 | SiO2-Al2O3 | Oleic acid | 100 | 11.0 | 89.0 |
3 | SiO2-TiO2 | Rice bran oil | 84.2 | 7.0 | 92.0 |
4 | SiO2-Al2O3 | Rice bran oil | 84.2 | 19.0 | 77.0 |