Use of Rapeseed Straight Vegetable Oil as Fuel Produced in Small-Scale Exploitations

Physicochemical Characterization of <i>Jatropha curcas</i> Linn Oil for Biodiesel Production in Nebbi and Mokono Districts in Uganda

“…Moreover, Drapcho, et al [16] found that biodiesel contains about 13% lower energy density than petroleum diesel, though has greater lubricity and undergoes further complete combustion. In this study, results presented in Table 2 show that calorific value of J. curcas L. oil from Mukono and Nebbi (37.10 ± 2.87 and 41.47 ± 0.76 MJ/kg, respectively) fall within what is recommended for biodiesel (>36 MJ/kg [34]) and compares with petroleum diesel (43.35 MJ/kg [40]). Notably [41], the high calorific value could be attributed to the presence of high quantity of polyphenol and hydrocarbon in the oil.…”

“…Literature [38] suggest that high CN is associated with fast engine starting and smooth combustion, whereas low cetane deteriorates engine performance and leads to high exhaust emissions of hydrocarbon gases and particulate. In this work, results show that CN of J. curcas L. oil from Mukono and Nebbi was found to be 36.00 ± 0.00 and 37.00 ± 1.00, respectively-lower than fossil diesel (47, [40]) and the norm (>51, according to EN ISO 5165 standard) for biodiesel in diesel engines ( Table 2). However, it is important to note that CN value of biodiesel can be increased by increasing the length of hydrocarbons of fatty acid and ester groups, but can also be reduced significantly by increased number of double bonds [38].…”

The effect of temperature, time, and methanol concentration on enhancing the yield of biodiesel production of castor and rapeseed seeds via the Transesterification process

“…Initially, the mass yield decreased at low temperatures due to the low kinetic energy of reaction molecules, then increased with rising temperature, and eventually declined. The elevation in temperature enhanced mass yield by increasing the energy of reacting molecules, improving the miscibility of polar alcohol with non-polar oil, and facilitating faster reactions [24], [25] [13]. However, beyond 90 °C, the mass yield decreased, potentially attributed to alcohol evaporation at higher temperatures [26], [27].…”

Rapeseed oil fuel application in diesel engines and logistics

“…Šādas loģistikas sistēmas modelēšana būtu ļoti darbietilpīga un aptuvena, jo centralizētās ražošanas gadījumā ieņēmumu un izdevumu pozīcijas variē ļoti plašās robežās atkarībā no uzņēmuma lieluma, specifikas u.tml. Tāpēc, izmantojot citās valstīs veikto pētījumu pieredzi (Baquero et al, 2010(Baquero et al, , 2011a(Baquero et al, , 2011bFore et al, 2011) un, piemērojot to Latvijas apstākļiem, rapša eļļas degvielas izmantošanas ekonomiskā efektivitāte novērtēta decentralizētajā ražošanā.…”

“…Rapša sēklas satur 45% eļļas. Spānijā veiktajos pētījumos(Baquero et al, 2011a) norādīts, ka ar mazjaudas spiedi no 100 kg rapša sēklu iegūst 28 -36 kg eļļas degvielas un 64 -72 kg raušu.Latvijā vairākās zemnieku saimniecībās izmanto Alvan Blanch (Lielbritānija) un Skeppsta Maskin AB (Zviedrija) ražotās eļļas spiedes. Firmas Alvan Blanch eļļas spiede XP-100 parādīta 1.4. attēlā (Oil Expeller Press …, S.a.).…”