scholarly journals A Laboratory Study of the Effect of Temperature on Densities and Viscosities of Binary and Ternary Blends of Soybean Oil, Soy Biodiesel and Petroleum Diesel Oil

2012 ◽  
Vol 02 (04) ◽  
pp. 444-452 ◽  
Author(s):  
Oluwafunmilayo A. Aworanti ◽  
Samuel E. Agarry ◽  
Ayobami O. Ajani
Keyword(s):  
Soybean Oil ◽  
Laboratory Study ◽  
Diesel Oil ◽  
Effect Of Temperature ◽  
Ternary Blends

scholarly journals Effect of temperature on predation by Tasmanian lacewing larvae

2001 ◽  
Vol 54 ◽  
pp. 244-247 ◽  
Author(s):  
S.S. Islam ◽  
R.B. Chapman
Keyword(s):  
Larval Development ◽  
Laboratory Study ◽  
Consumption Rate ◽  
Effect Of Temperature ◽  
Fluctuating Temperature ◽  
Cabbage Aphid ◽  
Larval Behaviour ◽  
Temperature Regimes ◽  
Consumption Rates ◽  
Constant And Fluctuating Temperature

A laboratory study investigated the predation and development rates of Tasmanian lacewing larvae (Micromus tasmaniae) under constant and fluctuating temperature regimes Larval development and consumption of second instar cabbage aphid (Brevicoryne brassicae) increased linearly with constant temperatures between 1030C Under fluctuating daily temperatures (1025C) development and consumption rates were equivalent to those found at a constant 25C Larvae consumed more aphids during later instars and a maximum consumption rate of approximately 10 aphids per day was recorded Some aspects of larval behaviour are described

Optimisation of Bleaching Conditions for Soybean Oil Using Response Surface Methodology

2005 ◽  
Vol 11 (6) ◽  
pp. 443-449 ◽  
Author(s):  
J. Ortega-García ◽  
L. A. Medina-Juárez ◽  
N. Gámez-Meza ◽  
J. A. Noriega-Rodriguez
Keyword(s):  
Response Surface Methodology ◽  
Soybean Oil ◽  
Response Surface ◽  
Contact Time ◽  
Tocopherol Content ◽  
Refining Process ◽  
Edible Oil ◽  
Effect Of Temperature ◽  
Partial Vacuum

The refining process applied to soybean oil (SBO) in order to obtain the desirable purity characteristics as edible oil, produces chemical changes by partially removing desirable components such as tocopherols. In this study, the effect of temperature (76.4-143.6°C), contact time (6.4-73.6min) and clay amount (0.16-1.84% w/w) on tocopherol content and quality of SBO were evaluated. Neutralised soybean oil was subjected to bleaching using different clay amounts (Tonsil Optimum 320 FF), stirring (250rpm), and partial vacuum (60mmHg). A response surface methodology (RSM) was used to find the parameters that produce bleached oil with minimum peroxide value (PV), maximum tocopherol retention (TOCR) and light colour. The optimal bleaching conditions for SBO were: temperature, 96°C; time, 23min; clay amount, 1.4% w/w oil. Under these conditions, a bleached soybean oil with 0.1meq/kg of PV, 91.74% of TOCR, and colour 1.53 Lovibond red value units was obtained.

scholarly journals The effect of temperature and shearing rate on dynamic viscosity of RME containing fuels

2008 ◽  
Vol 135 (4) ◽  
pp. 46-53
Author(s):  
Grzegorz WCISŁO
Keyword(s):  
Constant Temperature ◽  
Diesel Fuel ◽  
Dynamic Viscosity ◽  
B Value ◽  
Diesel Oil ◽  
Rate Function ◽  
Effect Of Temperature ◽  
Type B ◽  
Diesel Fuels ◽  
Shearing Rate

The paper presents the results of a research on determining the temperature and shearing rate effect on dynamic viscosity of type B biofuels. This type of fuels are diesel fuels containing a biocomponent supplement. The “B” value denotes a volumetric share of the biocomponent in a mixture with diesel fuel. Three kinds of biofuels have been tested: B100 (100% RME), B20 (20% RME) and B5 (5%RME). B20 and B5 biofuels were prepared on the basis of commercial VERVA ON diesel oil. The dynamic viscosity of B100 RME biofuels within the temperature range from 30 to –15oC assumes values from c.a. 10 to 95 mPa·s. The dynamic viscosity of RME biofuels at constant temperature 25oC within the range of shearing rate from 0 to 2000 s–1 changed its value from 7 to 15 mPa·s. B5 biofuel reveals also a strong dependency of the dynamic viscosity in the shearing rate function. For the lowest values of the shearing forces the dynamic viscosity assumed the values of 2.5 mPa·s. The dynamic viscosity grew reaching the value of 8.5 mPa·s at 2000 s–1 along with the increasing shearing forces. The research demonstrated that the dynamic viscosity of fuels is seriously affected not only by the temperature, as has been hitherto suggested, but also by the shearing rate.

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