Evaluation of physicochemical, thermal and tribological properties of sesame oil (Sesamum indicum L.): a potential agricultural crop base stock for eco-friendly industrial lubricants

Nair, Sabarinath Sankaran; Nair, K. Prabhakaran; Rajendrakumar, P. K.

doi:10.1504/ijarge.2017.084037

Cited by 25 publications

(29 citation statements)

References 24 publications

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“…On the other hand, sesame oil has an acidity of 2.9, a value close to that presented by other studies [6] and well above the acidity of sunflower and coconut oils also reported by this author, other researchers reported the same results [19]. Regarding the viscosity index, coconut oil shows values close to 9 showing low viscosity at high temperatures, contrary to sesame oil with a value of 156.4 for finally, the density presents very close values in these three oils [6].…”

Section: A Characterisation Of the Oilssupporting

confidence: 90%

“…This is the most important property of a lubricant at low temperatures. It is observed that, for sesame oil, the Tmax of the first exothermic peak (-14.67°C) approaches the reported melting point (-14°C) as determined by the ASTM D1959 method [6]. These results demonstrate that the DSC technique offers a fast and easy method for determining the pour points of lubricants.…”

Section: B Behaviour At Low Temperaturesmentioning

confidence: 56%

“…This behaviour can be attributed to the fact that Sesame oil has a higher concentration of unsaturated fatty acids: oleic acid (37.69%) and linoleic acid (46.59%) according to the lipid profile. In the triglycerides containing the unsaturated fatty acids, the chains adopt a bent conformation which prevents the close packing of the molecules during the cooling process [6]. The mineral oils, on the other hand, begin to crystallise at higher temperatures due to the saturated nature of their hydrocarbon chains, which favour the packing of the molecules during cooling and consequently crystallisation.…”

Section: B Behaviour At Low Temperaturesmentioning

confidence: 99%

“…Comparing the pour points of the three studied oils, determined using the DSC cooling (Table 4), it was found the sesame oil has the lowest pour point and therefore behaves better at low temperatures. As references for vegetable oils with a lower pour point than sesame oil, it is found sunflower oil and an SAE 20W40 commercial mineral oil [6]. For vegetable oils, low temperature performance is expected to be one of the main drawbacks for use as lubricants [5], [24].…”

Section: B Behaviour At Low Temperaturesmentioning

confidence: 99%

“…According to characterizations presented by [4] the seeds contain 6% moisture, 52% crude oil, 22% crude protein, 3.5% crude fiber and 4.5% ash. In the sesame seeds, oil is stored in oil bodies, give a yield of 57-63%; compared with other vegetable oils, sesame oil has various advantages as a green lubricant: it has greater fluidity at low temperatures due to the high concentration of olefinic double bonds [6].…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of the thermal properties of Sesame oil and two mineral oils of different viscosity

Cubillos¹,

Delgado-Tobón

Chaparro³

2019

Inge Cuc

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Introduction: In recent years the research and development of biolubricants from vegetable oils has increased to minimize the impact on the environment of petroleum derivatives. Objective: In this work, there was realized a comparative study of the thermal properties of the oil of Sesame with those of two mineral oils, of medium and high viscosity (360 and 255), which were free of additives. Method: The characterization of the three oils was performed using the technique of infrared spectroscopy (FT-IR) and physical properties such as kinematic viscosity, density, thermal and oxidative properties were determined by the analysis of Differential Calorimetry Scanning (DSC). Results: The sesame oil had a pour point of – 14.67 ° C, lower temperature than for mineral oils of 255 and 360, (– 4.29 ° C and – 6.89 ° C, respectively). The high content of unsaturated fatty acids (84.86%) could be responsible for this behavior. The oils were stable to temperatures near to 250 °C and with nitrogen atmosphere. Mineral oils were more stable to oxidation because of their high content of fatty acids with saturated hydrocarbon chains which it had no oxidizable sites. Conclusions: Nevertheless, the low stability of sesame oil is due to the high content of unsaturated fatty acids, the use of antioxidant, additive or a chemical modification of the unsaturated chains, this property might be improved to use the oil as a lubricant.

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Section: A Characterisation Of the Oilssupporting

confidence: 90%

Section: B Behaviour At Low Temperaturesmentioning

confidence: 56%

Section: B Behaviour At Low Temperaturesmentioning

confidence: 99%

Section: B Behaviour At Low Temperaturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparative study of the thermal properties of Sesame oil and two mineral oils of different viscosity

Cubillos¹,

Delgado-Tobón

Chaparro³

2019

Inge Cuc

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Experimental and quantum chemical investigations on the oxidative stability of sesame oil base stock with synthetic antioxidant additives

Sabarinath

Nair

Rajendrakumar

2018

Lubrication Science

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Depleting resources and increasing environmental pollution caused by the petroleum products made researchers to think about its biodegradable counterparts. Vegetable oils due to its characteristics such as availability, renewability, eco‐friendliness, and biodegradability are progressively encouraged as a replacement for mineral oils in lubricant industry, while enhancement of few properties like the oxidative stability aids in the efficient use of them as the base stock. A generous amount of unsaturation in vegetable oils decreases oxidative stability and improves the pour point. Hence, a compromise between these two properties (pour point and oxidative stability) is critical in vegetable oil‐based lubricant. In this regard, sesame oil (SESO) possesses high pour point, and presence of natural antioxidants in it imparts superior oxidative stability than any other vegetable oils with a higher level of unsaturation. The addition of certain synthetic antioxidants to the SESO helps in the further improvisation of its oxidative stability to suit it for lubricant purpose. In the present work, the oxidative stability of SESO blended with octyl gallate (OG), salicyl hydroxamic acid, 2,5‐di‐tert‐butyl hydroquinone (DTBHQ), and tertbutyl hydroquinone (TBHQ) are assessed using hot oil oxidation test (HOOT) and differential scanning calorimetry (DSC, ASTM E2009‐08). The results are further compared with commercially available mineral oil‐based lubricant, SAE20W40. HOOT results show that a blend of SESO + 1.5%DTBHQ + 0.5%OG possesses higher oxidative stability than other antioxidant blends with SESO. In addition, from the DSC results, it is observed that the oxidative onset temperature (OOT) for abovementioned combination (268.10°C) shows an increase of 46.6% than the value of neat SESO (182.79°C) and is nearer to SAE20W40 (277.38°C). Fourier‐transform infrared spectroscopy results show that SESO + 1.5%DTBHQ + 0.5%OG combination subjected to HOOT hampers oxidation and hence increases the oxidative stability. The tribological properties of neat and antioxidant added SESO are studied using a four‐ball tester. Quantum chemical studies are also performed for antioxidant molecules on the basis of bond dissociation energies, ionisation potential, and HOMO‐LUMO energy gap to identify the dominant antioxidant mechanisms.

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A new method for improving the solar photovoltaic unit efficiency through neem oil as coolant medium for high power applications—an experimental investigation

Ganesan,

Palanisamy,

Muthusamy

et al. 2024

Electr Eng

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The utilization of electric energy is rising in the technological world. Solar PV (photovoltaic) cells convert sunlight into electricity, and sunlight radiation also has heat, reducing the panel's efficiency. The heat should control the limited value or otherwise reduce the panel's performance so that heat is moved to the cooling medium, thus maintaining the heat within the functioning limit. The proposed method is explained by the probability of cooling the monocrystalline and polycrystalline structures used as neem oil through an integrated oil container fitted into the unit's backside—the neem oil acts as phase-changing material (PCM). The solar PV rear side neem oil absorbs the heat of the solar PV panel. The neem oil is not filled in the backside tank completely for the reason that the oil needed some breathing gap. The breathing gap of PCM is to enhance the heat-withstand efficiency. The backside neem oil is replaced every 30 min. As an outcome, the front side of solar PV heat is reduced. Neem oil has not polluted the environment and is thus also used to exchange noxious mineral oils. The neem oil moved from the depository tank to the backside of the unit and together into an additional depositor tank, thus being able to be reused. The proposed method is investigated, and functioning comparison occurs in different PV types, such as monocrystalline and polycrystalline modules, with various kinds of edible oil. Thus, the critical outcomes of the monocrystalline and polycrystalline PV panels are to decrease the panel temperature by 2.29% and 4.34%, respectively, and enhance the efficiency of the PV panels by 15.0% and 17.8%, respectively.

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Evaluation of physicochemical, thermal and tribological properties of sesame oil (Sesamum indicum L.): a potential agricultural crop base stock for eco-friendly industrial lubricants

Cited by 25 publications

References 24 publications

Comparative study of the thermal properties of Sesame oil and two mineral oils of different viscosity

Comparative study of the thermal properties of Sesame oil and two mineral oils of different viscosity

Experimental and quantum chemical investigations on the oxidative stability of sesame oil base stock with synthetic antioxidant additives

A new method for improving the solar photovoltaic unit efficiency through neem oil as coolant medium for high power applications—an experimental investigation

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