Authors:Brajendra Sharma, Umer Rashid, Farooq Anwar, and Sevim Erhan
The increasing application of biobased lubricants could significantly reduce environmental pollution and contribute to the
replacement of petroleum base oils. Vegetable oils are recognized as rapidly biodegradable and are thus promising candidates
for use as base fluids in formulation of environment friendly lubricants. Although many vegetable oils have excellent lubricity,
they often have poor oxidation and low temperature stability. Here in, we report the lubricant potential of Moringa oil, which
has 74% oleic acid content and thus possess improved oxidation stability over many other natural oils. For comparison, Jatropha
oil, cottonseed oil, canola oil and sunflower oil were also studied. Among these oils, Moringa oil exhibits the highest thermo-oxidative
stability measured using PDSC and TG. Canola oil demonstrated superior low temperature stability as measured using cryogenic
DSC, pour point and cloud point measurements. The friction and wear properties were measured using HFRR. Overall, it was concluded
that Moringa oil has potential in formulation of industrial fluids for high temperature applications.
Authors:G. A. A. Teixeira, A. S. Maia, I. M. G. Santos, A. L. Souza, A. G. Souza, and N. Queiroz
assessing all the aspects of the biodiesel quality, several specifications determine the limits for low-temperature biodiesel tests, such as cloud point, CP, (EN 23 015, ASTM D-2500), pourpoint, PP, (ASTM D-1997, ASTM D-5949), and cold filter plugging point
Authors:M. Kök, J. Letoffe, P. Claudy, D. Martin, M. Garcin, and J. Volle
Thermal characteristics of eight crude oils and their treatment with additives were studied by differential scanning calorimetry
(DSC), thermomicroscopy, viscometer and pour point tester. Different additives were found as more effective for different
type of crude oils depending on the wax content. Crude oils showed a reduced pour point after treatment with additives. Effects
of different additives were also discussed by analysing the DSC curves and thermomicroscopy result.
In this research, differential scanning calorimetry (DSC) and gas chromatography is used to determine the wax content of fourteen
crude oils of different sources. Different empirical equations were applied to compare the wax content of crude oils. For
the fourteen crude oil samples with the wax content ranging from 7.5 to 43.8 mass%, it was observed that the results of empirical
equations were in good agreement with those determined by DSC and GC. Accordingly, a correlation between ASTM pour point and
the temperature at which 2 mass% of wax has precipitated out from crude oil is developed.
Authors:Adebayo Surajudeen Adekunle, Adekunle Akanni Adeleke, Peter Pelumi Ikubanni, Peter Olorunleke Omoniyi, Tajudeen Adelani Gbadamosi, and Jamiu Kolawole Odusote
value, flash point, pourpoint, and free fatty acid were analyzed in accordance to International Standard. 2.3 Casting of Al-alloy rods Al-alloy rods were produced using sand casting method to obtain 15 mm diameter cast cylindrical rods and then machined
Authors:M. L. S. De Melo, N. A. Santos, R. Rosenhaim, A. G. Souza, and P. F. Athayde Filho
to ASTM D 6371 with equipment model AFP-102 Tanaka.
The CP and pourpoint were determined, respectively, according to the rules ASTMD 2500 and ASTM D 1997 with equipment MPC-102L Tanaka.
The CI was calculated by relating the rates
Authors:Francisco J. N. Maia, Viviane G. Ribeiro, Claudenilson S. Clemente, Diego Lomonaco, Pedro H. M. Vasconcelos, and Selma E. Mazzetto
by closed-ring saturated hydrocarbons; possess lower viscosity, lower flash point, lower pourpoint, and lower resistance to oxidation. Owing to these properties, naphthenic mineral oils are generally used in process with narrow temperature ranges and
Authors:N. A. Santos, R. Rosenhaim, M. B. Dantas, T. C. Bicudo, E. H. S. Cavalcanti, A. K. Barro, I. M. G. Santos, and A. G. Souza
been used during sample cooling to evaluate the effect of low temperatures on biodiesel properties [ 6 ]. DSC is a more rigorous and efficient method to study crystallization temperature than that of traditional methods (cloud point, pourpoint, and