Synthesis of Imine Compound With Antioxidant and Anticorrosion Activity Applied in Biodiesel
Name: LUCAS FERREIRA MARTINS
Type: MSc dissertation
Publication date: 14/05/2019
Advisor:
Name |
Role |
|---|---|
| VALDEMAR LACERDA JUNIOR | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| GLORIA MARIA DE FARIAS VIÉGAS AQUIJE | External Examiner * |
| REGINALDO BEZERRA DOS SANTOS | External Examiner * |
| VALDEMAR LACERDA JUNIOR | Advisor * |
| VIVIAN CHAGAS DA SILVEIRA | Co advisor * |
| WANDERSON ROMÃO | Internal Examiner * |
Summary: Biodiesel is a renewable biofuel produced from transesterification of vegetable oils and animal fats with short-chain alcohols. Despite being environmentally friendly, biodiesel has low oxidative stability and is gradually degraded by autooxidation reactions. Furthmore, metallic structures are corroded when immersed in biodiesel, for being a higher electric conductive (compared with petro diesel) and hygroscopic medium. To rise oxidative stability and not damage fuel engines and storage tanks, antioxidants (reduce catalytic radical reactions) and corrosion inhibitors (adsorbs on metallic surface) are added in biodiesel. In this dissertation are discussed the synthesis of the new phenolic-iminic compound N,N-bis-(4-hexadecanoate)salicylidene-ethylenedimaine, named IM, to play as multifunctional molecule, exhibiting antioxidative and corrosion inhibition activity. IM reduced carbon steel AISI 1020 coupons immersed in biodiesel, at room temperature and under heating and showed better results than commercial compounds butylated hydroxytoluene (BHT), tert-butylhydroquinone (TBHQ) and pyrogallol (PY). IM also increased oxidative stability of biodiesel contaminated with cooper ions, working as metal chelator, and reduced dissolved oxygen in biodiesel, working as oxygen scavenger. Corrosion was evaluated by light microscopy, scanning electron microscopy and atomic force microscopy. Oxidative stability tests were made by PetroOXY method.
