Predicting temperature‐dependence viscosity of vegetable oils from fatty acid composition

Abstract

The viscosities of 12 vegetable oils were experimentally determined as a function of temperature (5 to 95°C) by means of a temperature-controlled rheometer. Viscosities of the oil samples decreased exponentially with temperature. Of the three models [modified Williams-Landel-Ferry (WLF), power law and Arrhenius] that were used to describe the effects of temperature on viscosity, the modified WLF model gave the best fit. The amounts of monounsaturated FA or polyunsaturated fatty acids (PUFA) highly correlated (R 2 > 0.82) with the viscosities of the oil samples whereas poor correlations (R 2 < 0.17) were obtained between viscosities and the amounts of saturated or unsaturated FA. An exponential equation was therefore used to relate the viscosity of these vegetable oil samples to the amounts of monounsaturated FA or PUFA. The models developed are valuable for designing or evaluating systems and equipment that are involved in the storage, handling, and processing of vegetable oils.

Evaluation of the Phytochemical and Antioxidant Potential of Aerial Parts of Iranian Tanacetum parthenium

“…26 The fatty acid composition of the aerial parts oil are presented in Table 2 that analyzed using a GC-FID for the first time from Iran. n-heptane extraction of T. parthenium herb aerial parts yielded 36% oil.…”

“…It seems that these valuable metabolites are affected by both genetic and environmental factors. 26 However, vegetable oils play important functional and sensory roles in food products, and they also provide energy and the essential fatty acids (monounsaturated or polyunsaturated), responsible for growth. …”

Reduction of Persistent Organic Pollutant Emissions during Incinerator Start-up by Using Crude Waste Cooking Oil as an Alternative Fuel

“…Other rheological studies have confirmed this behavior on edible vegetable oils (Maskan, 2003;Fasina et al, 2006;Kim et al, 2010;Hassanien and Sharoba, 2014). This temperature dependence of viscosity of oils has been shown to be advantageous in application of vegetable oils in diesel engines to reduce wear and engine aging (Esteban et al, 2012).…”

“…2 shows the relationships between viscosity and temperature for waste cooking oil and diesel blends. Determination of viscosity as a rheological parameter is important considering the pumping process of fuel blends from one vessel to another such as storage tank to the furnace (Fasina et al, 2006). At room temperature (25°C), the viscosity of waste cooking oil (48 cP) was about 6 times that of diesel fuel (8 cP) in this study.…”

Simulation and Field Measurements of Reliability Parameters of Dump Truck Hydraulic System

“…mm per sec. are used as the working fluid in the hydraulic system of a dump truck with gear wheel pumps with an operating fluid temperature range from 0 to 80 °C [2,4].…”