Evaluation of Antioxidant Activity of Natural Extracts on the Oxidative Stability of Cottonseed Biodiesel

Freitas, João Paulo Almeida; França, Fernanda Rocha Morais; Silva, Maria S.; Toms, Richard J.; Silva, Gabriel Francisco da

doi:10.1590/0104-6632.20190362s20180308

Cited by 14 publications

(3 citation statements)

References 27 publications

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“…It can be observed that the addition of antioxidants to biodiesel to prolong storage time can also reduce KV. Previous studies reported that KV was reduced at lower concentrations of antioxidant additives PY at (500 ppm) and slightly increased at high concentrations (1000 ppm), but lower than pure biodiesel having concluded that the addition of antioxidants to biodiesel increases storage stability and also improves KV 39,43 . Similar study showed an improvement in terms of KV (5.9 mm 2 s −1 ) and stability of biodiesel, using a concentration of 3000 ppm of PY and tert‐butyl hydroxyquinone (TBHQ) 42 …”

Section: Resultsmentioning

confidence: 80%

“…Previous studies reported that KV was reduced at lower concentrations of antioxidant additives PY at (500 ppm) and slightly increased at high concentrations (1000 ppm), but lower than pure biodiesel having concluded that the addition of antioxidants to biodiesel increases storage stability and also improves KV. 39,43 Similar study showed an improvement in terms of KV (5.9 mm 2 s −1 ) and stability of biodiesel, using a concentration of 3000 ppm of PY and tert-butyl hydroxyquinone (TBHQ). 42 the BHT presented values of density within the standards of (850-900 kg m −3 ) ANP, ASTM, EN (Table 1) after 1176 h, but B100 extrapolated the limits.…”

Section: Evaluation Of Storage Stabilitymentioning

confidence: 73%

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A novel application of Mangifera indica L and Eugenia uniflora L extracts as antioxidants to control biodiesel oxidation stability

Neuana¹,

Barboza²,

Santos

et al. 2020

Env Prog and Sustain Energy

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The present research aims to evaluate the effect on the stability of biodiesel during the storage period at 60°C and at low temperatures of the antioxidants from extracts of mango (biodiesel with extracts of mango), pitanga (biodiesel with extracts of pitanga) added at concentrations of 500, 2000, 4000 and 8000 parts per million to soybean biodiesel. All samples were characterized by the tests of acid value, kinematic viscosity, cloud point, pour point, pour point, cold filter plugging point and Fourier transform infrared (FTIR). Through the FTIR, it was observed that the CH and OH regions showed greater intensity for the non‐additive biodiesel (B100) in relation to the additive Biodiesel, which shows the antioxidant effect of the additives on the oxidative stability of biodiesel. The effect of the extracts on thermo‐oxidative stability follows the sequence: mango leaf extracts > pitanga leaf extracts > B100 after 504 h and at the low temperature the effect of antioxidant following sequence: pitanga extract > mango extract > B100 showing the effect of the antioxidant additives of leaf extracts on the stability of soybean biodiesel at regions of high and low temperatures. The mango and pitanga leaves extracts, are very promising as green antioxidant for biodiesel because it allows the longest storage time without deteriorating.

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Section: Resultsmentioning

confidence: 80%

Section: Evaluation Of Storage Stabilitymentioning

confidence: 73%

A novel application of Mangifera indica L and Eugenia uniflora L extracts as antioxidants to control biodiesel oxidation stability

Neuana¹,

Barboza²,

Santos

et al. 2020

Env Prog and Sustain Energy

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show abstract

“…responsible for these properties are mainly curcuminoids (curcumin, demethoxycurcumin, bisdemethoxycurcumin and cyclocurcumin), followed by phenolic acids, and flavonoids (Chumroenphat et al, 2021). (Freitas et al, 2019).…”

Section: Phenolic Compoundsmentioning

confidence: 99%

Assessment of natural and pyrolytic antioxidants as additives to biodiesel production

Falconí Heredia

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Brazil is one of the largest producers and consumers of biodiesel in the world, with a production of 6.7 million m 3 in 2021. Its main sources for biodiesel production are soybean oil and animal fat. The low oxidative stability of biodiesel is a problem that has not yet been satisfactorily solved and represents the main barrier to market expansion. Therefore, a promising approach to improve oxidative stability is the addition of antioxidants. This study evaluated the effect and performance of natural extracts of Scenedesmus obliquus (S. obliquus), Haematococcus pluvialis (H. pluvialis), curcuma sp. (turmeric), Bixa Orellana (annatto) seeds, coffee husk (C. husk), and commercial Haematococcus pluvialis (C.H. pluvialis) as antioxidants during long-term storage of biodiesel matrices from soybean (Glycine max), canola (Brassica napus), and macauba (Acrocomia aculeata). In addition, the antioxidant properties of bio-oils produced from the slow pyrolysis of biodiesel synthesis of soybean, canola, macauba, and depigmented S. obliquus biomass were also investigated. Among the natural extracts, turmeric and S. obliquus stood out, which at the concentration of 3000 ppm produced increased stability time (35.0% for soybean, 51.8% for canola, and 338.4% for macauba) and (36.0% for soybean, 46.7% for canola, and 122.0% for macauba) respectively. Furthermore, the addition of S. obliquus bio-oil at a concentration of 4000 ppm produced an increase in stability time of 116.8 % (13.2 h) for soybean, 194.5% (17.7 h) for canola, and 563.5% (13.21 h) for macauba, which meets the Brazilian standard requirement (ANP resolution no. 798/219) of a minimum stability time of 12 hours for biodiesel. Keywords: Biodiesel. Catalysis. Natural antioxidants. Microalgae. Oxidation stability. Pyrolysis antioxidant

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A review on thermally induced phase separation technology in the fabrication of microporous polymer membrane devices for sustained‐repellent delivery: Crystallization and morphological studies

Mapossa,

Tewo,

Ray

et al. 2024

Journal of Polymer Science

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This article reports recent advances in thermally induced phase separation technology in fabricating microporous scaffold polymeric membranes as devices suitable for the controlled release of insect repellent. The key aspects, such as the crystallization behavior and morphological study of the polymeric membrane‐based repellent, were reported and discussed. Studies demonstrated that trapping of such repellents into microporous polymeric materials can be achieved by spinodal decomposition of the polymer/liquid repellent system. Usually, solubility is enhanced at elevated temperatures. Rapid cooling of such solution below the UCST leads to the formation of cocontinuous phase structures by decomposition. The polymer then forms an open‐cell structure with the repellent trapped inside. Approaches to forming such an open‐cell polymer structure containing mosquito repellent were successfully performed and confirmed with the SEM and POM techniques. It showed the structure of a polymer and liquid repellent prepared by spinodal decomposition, providing proof that thermally induced spinodal decomposition is a route to trap liquid mosquito repellent into a microporous polymer matrix. Additionally, the effects of polymer type, repellent nature, cooling conditions, and fillers on the morphology and performance of TIPS membranes are also discussed. Finally, challenges in developing microporous polymeric membrane‐based repellent using TIPS technology are addressed.

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Evaluation of Antioxidant Activity of Natural Extracts on the Oxidative Stability of Cottonseed Biodiesel

Cited by 14 publications

References 27 publications

A novel application of Mangifera indica L and Eugenia uniflora L extracts as antioxidants to control biodiesel oxidation stability

A novel application of Mangifera indica L and Eugenia uniflora L extracts as antioxidants to control biodiesel oxidation stability

Assessment of natural and pyrolytic antioxidants as additives to biodiesel production

A review on thermally induced phase separation technology in the fabrication of microporous polymer membrane devices for sustained‐repellent delivery: Crystallization and morphological studies

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