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The viscosity of diesel is 2.5–3.2 cSt at 40 °C and the viscosity of biodiesel made from soybean oil is between 4.2 and 4.6 cSt [153] The viscosity of diesel must be high enough to provide sufficient lubrication for the engine parts but low enough to flow at operational temperature.
Biofuels include bioethanol, an alcohol made by fermentation—often used as a gasoline additive, and biodiesel, which is usually used as a diesel additive. Specific energy is energy per unit mass, which is used to describe the chemical energy content of a fuel, expressed in SI units as joule per kilogram (J/kg) or equivalent units. [1]
These raw materials can either be mixed with pure diesel to make various proportions or used alone. Despite one’s mixture preference, biodiesel will release a smaller number of pollutants ( carbon monoxide , particulates and hydrocarbons ) than conventional diesel, because biodiesel burns both cleanly and more efficiently.
Vegetable oil blends - Mixing vegetable oil with diesel lets users get some of the advantages of burning vegetable oil and is often done with no modification to the vehicle. [4] Biodiesel - Biodiesel can be produced from vegetable oil through the process of transesterification. Biodiesel burns like normal diesel and works fine in any diesel engine.
Biofuel development and use is a complex issue because there are many biofuel options which are available. Biofuels, such as ethanol and biodiesel, are currently produced from the products of conventional food crops such as the starch, sugar and oil feedstocks from crops that include wheat, maize, sugar cane, palm oil and oilseed rape.
Biodiesel is used as fuel for vehicles and virtually all engines that take diesel can use biodiesel. Biodiesel can be used in its 100% pure form; however, it is commonly used as biodiesel fuel blends to reduce levels of hydrocarbons , carbon monoxide and particulates from diesel-powered vehicles. [ 8 ]
Both HVO diesel (green diesel) and biodiesel are made from the same vegetable oil feedstock. However the processing technologies and chemical makeup of the two fuels differ. The chemical reaction commonly used to produce biodiesel is known as transesterification. [2] The production of biodiesel also makes glycerol, but the production of HVO ...
Graph of UK figures for the Carbon Intensity of Biodiesels and fossil fuels. It assumes biodiesel is transported to the UK to be burnt. [2] Making and burning biodiesel contributes to atmospheric carbon dioxide to a smaller extent than burning fossil fuels. The calculation of exactly how much carbon dioxide is produced is a complex and inexact ...
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