Influence of TiO<sub>2</sub> as nano additive in rapeseed oil

Cristea, George Catalin; Cazamir, D; Dima, Dumitru; Georgescu, Constantin; Deleanu, Lorena

doi:10.1088/1757-899x/444/2/022011

Cited by 11 publications

(4 citation statements)

References 27 publications

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“…Clearly, the RSO is apparently dominated by oleic acid (84.7 wt %), followed by palmitic acid (6.71 wt %) and linoleic acid at 2.18 wt %. However, the high content of oleic acid of 84.7 wt % was above the range of 50 to 75 wt % often reported in literatures, − which may indicate its predominance in RSO and therefore occurred at enhanced levels among the free fatty acids that were esterified. Although high oleic RSO cultivars have been developed, it was unlikely that this result was conclusive and would be checked after the subcritical water hydrolysis method in Section .…”

Section: Results and Discussionmentioning

confidence: 64%

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

et al. 2022

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In this present work, the hydrolysis of a sample of rapeseed oil (RSO) and two waste cooking oil (WCO) samples in subcritical water has been carried out in a stirred batch stainlesssteel reactor to produce fatty acids. Using RSO as a model triglyceride, the effects of reaction parameters on the yields of fatty acids were investigated to determine the optimum set of hydrolysis conditions to be a temperature of 300 °C, a reaction time of 60 min, and a vegetable oil−water mass ratio of 1:2. The set of optimum conditions was applied to the hydrolysis of the WCOs. Oleic acid was the dominant fatty acid with yields of 74.4 wt % from RSO and 57.5 and 72.4 wt % from the two WCOs, respectively, while palmitic acid was the second most abundant fatty acid with yields of up to 31 wt %. The feedstocks and fatty acid products were characterized by acid−base titration and thermogravimetric analysis (TGA). Thereafter, the hydrolysis products from the optimum conditions were esterified to their fatty acid methyl esters (FAMEs), which were further characterized by gas chromatography−mass spectrometry (GC/MS) and TGA. With RSO at the optimum hydrolysis conditions, acid−base titration gave a fatty acid yield of 97.2 wt %, while TGA gave 86 wt %. Under the same conditions, the yield of FAMEs from GC/MS analysis was 88.6 wt %, while TGA gave a FAMEs' yield of 91 wt %. This study showed that the simple TGA method provided detailed and complete characterization of lipid feedstocks and their conversion products. In addition, subcritical water hydrolysis can be used to valorize WCOs to fatty acids, with little or no extensive feedstock purification, for various applications including biodiesel production.

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Section: Results and Discussionmentioning

confidence: 64%

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

et al. 2022

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“…It has been found that TiO 2 nanoparticles are unable to perform positively with rapeseed oil. For example, in a previous study, the COF was increased under the tested range of operating conditions using a four-ball tribotester compared to neat rapeseed oil, and it was suggested that experiments must be conducted with some other sets of operating conditions in order to find the suitability of TiO 2 nanoparticles with rapeseed oil [ 78 ]. Meanwhile, the addition of TiO 2 nanoparticles in pongamia oil reduced the COF by almost 10% when an optimum concentration of 0.1 wt% of nanoparticles was used on a pin-on-disk tribometer.…”

Section: Nanoparticles In Biolubricantsmentioning

confidence: 99%

A Review of Friction Performance of Lubricants with Nano Additives

et al. 2021

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It has been established in literature that the addition of nanoparticles to lubricants at an optimum concentration results in a lower coefficient of friction compared to lubricants with no nanoparticle additives. This review paper shows a comparison of different lubricants based on the COF (coefficient of friction) with nanoadditives. The effect of the addition of nanoparticles on the friction coefficient was analyzed for both synthetic and biolubricants separately. The limitations associated with the use of nanoparticles are explained. The mechanisms responsible for a reduction in friction when nanoparticles are used as an additive are also discussed. Various nanoparticles that have been most widely used in recent years showed good performance within lubricants, including CuO (copper oxide), MoS2 (molybdenum disulfide), and TiO2 (titanium dioxide). The paper also indicates some research gaps that need to be addressed.

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“…Friction modifying and wear reducing additives can be grouped into solid lubricants and organic modifiers. The first group consists of carbon materials (graphite, graphene, black carbon, and fullerene), lamellar sulfides (tungsten and molybdenum), metal salts (boron nitride), and metal oxides (CuO, ZnO, and TiO 2 [47], which is not mentioned in [23]) but also linear polymers (polytetrafluoroethylene) [48]. Among the organic additives that act as friction modifiers are carboxylic acids or derivatives (stearic acid and esters), amides, imides, amines and their derivatives (oleyl amide, etc.…”

Section: Additivation Of Soybean Oil 21 Classification Of Additivesmentioning

confidence: 99%

Tribological Behavior of Soybean Oil

Georgescu¹,

Deleanu²,

Cristea³

2019

Soybean - Biomass, Yield and Productivity

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This chapter presents experimental data in the favor of using soybean oil, additivated or not, as lubricants, the market share of the soybean oil on the lubricants' market, a SWOT analysis for better configuring the tribological characteristics of the soybean oil and tribological parameters as friction coefficient, wear scar diameter, wear rate of wear scar diameter, etc. and their dependence on testing regime (load and speed). Also, the influence of temperature, shear rate, and oxidation parameters on the soybean oil viscosity is discussed.

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Influence of TiO₂ as nano additive in rapeseed oil

Cited by 11 publications

References 27 publications

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

A Review of Friction Performance of Lubricants with Nano Additives

Tribological Behavior of Soybean Oil

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Influence of TiO2 as nano additive in rapeseed oil

Cited by 11 publications

References 27 publications

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

Subcritical Water Hydrolysis of Fresh and Waste Cooking Oils to Fatty Acids Followed by Esterification to Fatty Acid Methyl Esters: Detailed Characterization of Feedstocks and Products

A Review of Friction Performance of Lubricants with Nano Additives

Tribological Behavior of Soybean Oil

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Influence of TiO₂ as nano additive in rapeseed oil