Antioxidative properties of hydrogenated cardanol for cotton biodiesel by PDSC and UV/VIS

Bicudo, Tatiana de Campos; Rodrigues Filho, M. G.; Souza, A. G.; Santos, I. M. G.; Silva, M. C. D.; Sinfrônio, F. S. M.; Vasconcelos, A. F. F.

Antioxidative properties of hydrogenated cardanol for cotton biodiesel by PDSC and UV/VIS

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dc.contributor.author	Bicudo, Tatiana de Campos
dc.contributor.author	Rodrigues Filho, M. G.
dc.contributor.author	Souza, A. G.
dc.contributor.author	Santos, I. M. G.
dc.contributor.author	Silva, M. C. D.
dc.contributor.author	Sinfrônio, F. S. M.
dc.contributor.author	Vasconcelos, A. F. F.
dc.date.accessioned	2020-10-09T19:29:05Z
dc.date.available	2020-10-09T19:29:05Z
dc.date.issued	2009-04-27
dc.description.resumo	Biodiesel is a non-toxic biodegradable fuel that consists of alkyl esters produced from renewable sources, vegetal oils and animal fats, and low molecular mass alcohols, and it is a potential substitute for petroleum-derived diesel. Depending on the raw materials used, the amount of unsaturated fatty acids can vary in the biodiesel composition. Those substances are widely susceptible to oxidation processes, yielding polymeric compounds, which are harmful to the engines. Based on such difficulty, this work aims to evaluate the antioxidant activity of cashew nut shell liquid (cardanol), as additive for cotton biodiesel. The oxidative stability was investigated by the pressure differential scanning calorimetry (PDSC) and UV/Vis spectrophotometer techniques. The evaluated samples were: as-synthesized biodiesel – Bio T0, additivated and heated biodiesel – Bio A (800 ppm L –1 of hydrogenated cardanol, 150°C for 1 h), and a heated biodiesel – Bio B (150°C, 1 h). The oxidative induction time (OIT) analyses were carried out employing the constant volume operation mode (203 psi oxygen) at isothermal temperatures of 80, 85, 90, 100°C. The high pressure OIT (HPOIT) were: 7.6, 15.7, 22.7, 64.6, 124.0 min for Bio T0; 41.5, 77.0, 98.6, 106.6, 171.9 min for Bio A and 1.7, 8.2, 14.8, 28.3, 56.3 min for Bio B. The activation energy (E) values for oxidative processes were 150.0 1.6 (Bio T0), 583.8 1.5 (Bio A) and 140.6 0.1 kJ mol –1 (Bio B). For all samples, the intensities of the band around 230 nm were proportional to the inverse of E, indicating small formation of hyper conjugated compounds. As observed, cardanol has improved approximately four times the cotton biodiesel oxidative stability, even after the heating process	pt_BR
dc.identifier.citation	BICUDO, Tatiana de Campos et al. Antioxidative properties of hydrogenated cardanol for cotton biodiesel by PDSC and UV/VIS. Journal Of Thermal Analysis And Calorimetry, [S.L.], v. 97, n. 2, p. 605-609, 27 abr. 2009. Disponível em: https://link.springer.com/article 10.1007%2Fs10973-008-9600-3. Acesso em:08 set. 2020. http://dx.doi.org/10.1007/s10973-008-9600-3	pt_BR
dc.identifier.doi	10.1016/j.fuel.2008.10.015
dc.identifier.issn	1579-8943
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/30363
dc.language	en	pt_BR
dc.publisher	Springer	pt_BR
dc.rights	Attribution-NonCommercial 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc/3.0/br/	*
dc.subject	Biodiesel	pt_BR
dc.subject	PDSC	pt_BR
dc.subject	UV/Vis	pt_BR
dc.title	Antioxidative properties of hydrogenated cardanol for cotton biodiesel by PDSC and UV/VIS	pt_BR
dc.type	article	pt_BR