Hidroxilação dos óleos de girassol, milho e crambe e caracterização química dos polióis vegetais obtidos

Nascimento, Bárbara Zon; Costa, Ana Paula Oliveira

doi:10.1590/s1517-707620200003.1087

Cited by 2 publications

(5 citation statements)

References 28 publications

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“…Thus, the FTIR analysis agrees with the predicted chemical structure for para nic base oils (represented in Fig. 8) that generally compose more than 85% of turbine engine lubricant oils (Mortier et al 2011).…”

Section: Characterization Of the Turbine Engine Lubricant Oilsupporting

confidence: 81%

“…A control sample (without hydrogel) was used to determine water losses by phenomena other than the removal by the hydrogel (such as decantation or evaporation). Given that slight temperature uctuations and molecular collisions during mixing could potentially affect the emulsion's stability and water content within the oil (Mortier et al 2011), two mixing patterns were studied: orbital and total tumbling inversion. Orbital mixing homogenizes the sample by horizontal circular movements, while total tumbling inversion mixing promotes vertical rotation of the sample at 360º.…”

Section: Preparation Of Water-in-oil Emulsion and Determination Of Wa...mentioning

confidence: 99%

“…Silicones are generally used to impart antifoaming properties to the oil (Gazulla et al 2013). Sulfur and phosphorus may come from additives intended to provide detergent, dispersant and anticorrosive properties (Mortier et al 2011). These last compounds neutralize the acids that can be formed during oxidation reactions, prevent the corrosion of metallic surfaces and avert the formation of deposits from combustion or oxidation reactions (Mortier et al 2011).…”

Section: Characterization Of the Turbine Engine Lubricant Oilmentioning

confidence: 99%

“…Sulfur and phosphorus may come from additives intended to provide detergent, dispersant and anticorrosive properties (Mortier et al 2011). These last compounds neutralize the acids that can be formed during oxidation reactions, prevent the corrosion of metallic surfaces and avert the formation of deposits from combustion or oxidation reactions (Mortier et al 2011). Regarding the presence of sodium and potassium, they may either constitute additives or originate from contaminations during the dehydration process in salt beds (Barker, J., Cook, S., and Richards 2013).…”

Section: Characterization Of the Turbine Engine Lubricant Oilmentioning

confidence: 99%

“…Emulsi cation may occur due to the high mixing speeds typically observed in systems using lubricating oils (Mortier et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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Dehydration of Turbine Engine Lubricant Oil Using Cellulose Hydrogel

Estevam,

Perez,

Tsuruta

et al. 2024

Preprint

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Contamination of oils by water is a recurring problem in the industry and can damage engines and equipment. Oil dehydration systems with hydrogels have shown promise for the removal of free, soluble, and emulsified water. This work evaluates, in an unprecedented way, the dehydration of turbine lubricating oil using a cellulose hydrogel. The hydrophilic polymer was characterized through high-resolution SEM, EDS, FTIR, BET, TGA, DVS and swelling degree. The oil was evaluated regarding its composition and physicochemical properties. The performance of the hydrogel in the treatment of water-in-oil emulsion was analyzed in batch and continuous flow systems. A fixed bed apparatus was specially designed and sized according to the industry's specifications to simulate on-site application. The batch treatment was evaluated using orbital and full tumbling inversion mixing systems, both reaching removal efficiency of around 47%. Mixing by full tumbling allowed greater stability of the emulsion and control of the water concentration, but it required a longer time to enable adequate water uptake by the hydrogel. The efficiency of the hydrogel in the continuous flow system was affected by retention time and inlet water concentration. With a retention time of 12 min, it was possible to treat 1 L of oil, reducing the water concentration from 412 ppm to 197 ppm and the turbidity from Haze 6 to Haze 1. Thus, the cellulose hydrogel was efficient in dehydrating turbine lubricating oil, opening up the possibility of expanding its use to industrial facilities.

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Section: Characterization Of the Turbine Engine Lubricant Oilsupporting

confidence: 81%

Section: Preparation Of Water-in-oil Emulsion and Determination Of Wa...mentioning

confidence: 99%

Section: Characterization Of the Turbine Engine Lubricant Oilmentioning

confidence: 99%

Section: Characterization Of the Turbine Engine Lubricant Oilmentioning

confidence: 99%

“…Emulsi cation may occur due to the high mixing speeds typically observed in systems using lubricating oils (Mortier et al 2011).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dehydration of Turbine Engine Lubricant Oil Using Cellulose Hydrogel

Estevam,

Perez,

Tsuruta

et al. 2024

Preprint

View full text Add to dashboard Cite

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Produção e Caracterização de espumas de poliuretano produzidas a partir de diferentes óleos vegetais

Miranda,

Quintão,

Gualberto

et al. 2023

Revista Científica Multidisciplinar Núcleo do Conhecimento

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O poliuretano é um material com aplicações em diversos segmentos industriais, estando entre os polímeros mais produzidos do mundo. A substituição total de polióis de origem petroquímica por polióis vegetais na síntese de poliuretanos apresenta vantagens do ponto de vista ambiental e econômico e precisa ser estudada visando-se entender as características dos materiais formulados. Os polióisutilizados na síntese dos poliuretanos foram produzidos neste trabalho a partir dos óleos de palma, soja e linhaça, através da metodologia perácido in situ. Os testes físico-químicos mostraram aumento do índice de hidroxila de 22 para 145, de 39 para 107 e de 31 para 117 mgKOH. para óleo e poliol de palma, soja e linhaça, respectivamente, bem como diminuição do índice de iodo para os três casos. Além disso, os sinais de espectroscopia por infravermelho mostraram a presença de uma banda na região de 3400 , não observada em espectros dos óleos in natura, que indica a presença do agrupamento hidroxila (OH). Neste paper, as espumas foram produzidas com sucesso a partir de polióis de origem 100% vegetal pelo método “one shot” e foram caracterizadas por medidas de densidade, dureza, análise térmica e MEV, permitindo identificar algumas de suas possíveis aplicações práticas. A análise térmica mostrou que a temperatura Tonset para as espumas foi de 262 ºC para a palma, 279 ºC para a soja e 292 ºC para a linhaça, indicando menor estabilidade térmica para espuma de palma. As análises MEV mostraram que as três espumas apresentam heterogeneidade em sua estrutura morfológica. A análise comparativa dos resultados mostrou que existe relação entre propriedades físicas e mecânicas e as propriedades morfológicas das espumas, sendo a espuma de linhaça a que apresentou maior densidade celular, maior densidade aparente e a maior dureza.

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Hidroxilação dos óleos de girassol, milho e crambe e caracterização química dos polióis vegetais obtidos

Cited by 2 publications

References 28 publications

Dehydration of Turbine Engine Lubricant Oil Using Cellulose Hydrogel

Dehydration of Turbine Engine Lubricant Oil Using Cellulose Hydrogel

Produção e Caracterização de espumas de poliuretano produzidas a partir de diferentes óleos vegetais

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