| 초록 |
Ketonization of fatty acids to fatty ketones is a promising route to produce high-value chemicals such as lube base oil. Catalytic selectivity and deactivation in ketonization of C18 fatty acids having different unsaturation degree over TiO2 catalyst were studied. The results showed that fatty ketone yield gradually decreased with increasing degree of unsaturation, while byproducts (methyl ketones, and olefins) were produced due to McLafferty rearrangement. In ketonization of unsaturated fatty acids, McLafferty rearrangement and cracking produced polyunsaturated olefins which could be easily transformed to coke. The results implied that the ketonization of natural fatty acids requires the pre-saturation of C=C bonds for sustainable production of fatty ketones. Indeed, ketonization of saturated fatty acid mixture from hydrogenative hydrolysis of palm oil showed high fatty ketone yield and negligible deactivation. |
