Sylvie Willis
Animal oil has been used as a fuel source for centuries, with whale oil being a popular choice for lighting lamps, heating homes, and lubricating machinery. Today, animal fats and oils continue to be explored as alternative fuel sources for diesel engines, known as biodiesel. Biodiesel is produced through biological processes, particularly the transesterification of animal fats, and offers a renewable and biodegradable option for fuel. While vegetable oils are also used for biodiesel, animal fats have gained popularity due to their lower cost and limited market. However, challenges exist, such as high sulfur content and viscosity, as well as the large quantity of animal fat required. Nevertheless, companies like Green Earth Technologies are creating engine oils from animal fats, providing an alternative to traditional fossil fuels.
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What You'll Learn
Animal oil is used as an alternative to petroleum
Animal fats have gained popularity as a source of biodiesel due to their lower cost compared to vegetable oils, and their limited market. In the US, approximately one-third of fats and oils produced come from animals, such as beef tallow, pork lard, and chicken fat. These animal fats are traditionally used in industrial products like soap-making and lubricating oils, but they can also be used as biodiesel feedstock. Before fat can be turned into biofuel, it must be rendered into oil.
Animal fat-based biodiesel has some advantages over other types of fuel. It has a higher cetane rating than vegetable- or petrol-based biodiesel and produces smaller increases in NOx. However, it can have too high a sulfur content for highway use and may be too viscous. B100 biofuel, for example, should only be used in very warm climates. Additionally, animal-based biodiesel can be used with little-to-no modification to the diesel engine, as long as it is a diesel engine.
Animal-based biodiesel is not without its drawbacks. Spills of animal fats and oils can have devastating impacts on the environment, similar to those of petroleum oil spills. They can coat animals and plants, causing suffocation through oxygen depletion, and can kill or injure wildlife. Despite these concerns, companies like Green Earth Technologies are marketing products like G-Oil, a biodegradable oil made from animal fat that would usually be discarded by slaughterhouses, as an alternative to petroleum.
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Animal fat is used to make biodiesel
Animal fats are highly saturated, which means the fat solidifies at a relatively high temperature. Therefore, biodiesel made from animal fat has a high cloud point. For example, biodiesel made from beef tallow and pork lard has a cloud point between 55°F and 60°F. B100 (pure biodiesel) made from animal fat should only be used in very warm climates. However, animal fat biodiesel can be blended with petro-diesel to mitigate this issue. At lower blends such as B5 (a blend of 5% biodiesel with 95% petro-diesel), the high cloud point of the animal fat biodiesel does not significantly impact the blend's overall cloud point.
Animal fat feedstocks can be made into high-quality biodiesel that meets the ASTM specifications for biodiesel. The use of animal fats for biodiesel production has gained popularity over the past decade due to their lower cost compared to vegetable oils and their limited market. Animal fat is also used in industrial applications, such as soap-making and lubrication.
There are some drawbacks and challenges to using animal fat for biodiesel production. Animal fat biodiesel can have a high sulfur content, and it may contain contaminants that must be removed before use in engines. Additionally, the direct use of animal fat as a fuel can be challenging due to its higher viscosity compared to diesel. Nevertheless, with the increasing world population and rising demand for edible oils and animal fats, the use of animal fat as a feedstock for biodiesel production can help limit biodiesel's impact on food security and reduce production costs and environmental damage.
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Biodiesel is a renewable and biodegradable fuel
Biodiesel is a type of biofuel produced through biological processes rather than traditional geological processes. Unlike conventional fossil diesel, biodiesel is produced through the transesterification of vegetable oil, animal oils, fats, tallow, or used cooking oil.
Biodiesel is a liquid fuel produced from renewable sources, such as new and used vegetable oils and animal fats. It is a cleaner-burning replacement for petroleum-based diesel fuel. Biodiesel is non-toxic and biodegradable and is produced by combining alcohol with vegetable oil, animal fat, or recycled cooking grease.
Biodiesel can be blended with petroleum diesel in any percentage, including B100 (pure biodiesel) and B20 (a blend containing 20% biodiesel and 80% petroleum diesel). Biodiesel is the only alternative fuel to have successfully completed the Health Effects Testing requirements of the Clean Air Act (1990) in the United States. It can reduce direct tailpipe-emission of particulates on vehicles with particulate filters by as much as 20% compared to low-sulfur diesel.
Research has shown that biodiesel is an effective solvent for crude oil due to its methyl ester component, which considerably lowers the viscosity of the crude oil. Biodiesel also has a higher buoyancy than crude oil, which aids in its removal. Biodiesel is also effective in dissolving oil from polluted shorelines, with one study showing that it removed up to 80% of oil from cobble and fine sand.
The use of biodiesel can have a significant impact on reducing exhaust gas emissions. For example, the use of a swine lard methyl ester/diesel mixture resulted in an average reduction of hydrocarbon concentration by 13%, carbon monoxide by 22%, and carbon dioxide by 7%. Similarly, turkey biodiesel emissions showed respective reductions of 9%, 20%, and 6%. However, it is important to note that NOx emissions increased by 7% for both animal-based biofuels.
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Animal fat is cheaper than vegetable oil
Animal fat is a cheaper alternative to vegetable oil for car fuel. Biodiesel, a type of biofuel, can be produced from biological processes using animal fats and oils, or vegetable oils. Biodiesel is a popular choice for those wanting to reduce their dependency on traditional gasoline.
Animal fats have become an increasingly popular source of biodiesel feedstocks because their cost is lower than vegetable oils. This is because the market for animal fat is more limited than the market for vegetable oil. Much of the animal fat produced in places like the US is not considered edible by humans and is instead used in pet food, animal feed, and industrial purposes like soap-making.
Animal fat feedstocks can be made into high-quality biodiesel. However, there are some drawbacks and challenges to using animal fat. Waste fat from animal carcasses must be removed and then made into an oil using a process called rendering. This process involves grinding the fat until a fine consistency is achieved. Animal fat-based biodiesels can also have too high a sulfur content for highway use and can be too viscous.
Animal fat biodiesel has a higher cetane rating than vegetable-based biodiesel, and it produces smaller increases in NOx. Animal fat biodiesel has been shown to cause a significant reduction in exhaust gas emissions when compared to reference diesel. The use of swine lard methyl ester/diesel mixture, for example, caused an average reduction of hydrocarbon concentration (THC) by 13%, carbon monoxide (CO) by 22%, and carbon dioxide (CO2) by 7%.
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Animal fat is used to make engine oil
Animal fat is refined into oil through a rendering process that involves grinding animal by-products into a fine consistency and cooking them until the liquid fat separates and pathogens are destroyed. The solids are then passed through a screw press to complete the removal of fat from the solid residue. The cooking process also removes water, which makes the fat and solid material stable and prevents rancidity.
Animal fats contain saturated fatty acids, which result in biodiesel with a high cetane number, an important quality parameter for diesel fuels. This high cetane number helps engines start more quickly and run more quietly. Additionally, biodiesel made from animal fat has a high cloud point, which means it should only be used in very warm climates.
One company, Green Earth Technologies (GET), is turning tallow into premium engine oil on a commercial scale. Their product, G-Oil, is marketed for small engines and is biodegradable. The fat from one cow can produce about 110 liters of refined engine oil, making the process very efficient.
Animal fat-based biodiesel has several advantages, including a lower environmental impact. It has been shown to reduce exhaust gas emissions, such as hydrocarbon concentration, carbon monoxide, and carbon dioxide, when compared to reference diesel. Additionally, animal fat biodiesel has a higher cetane rating than vegetable and petrol-based biodiesel, resulting in smaller increases in NOx.
However, animal fat biodiesel also has some drawbacks. It can have high sulfur content, making it unsuitable for highway use, and it can be too viscous. The use of animal fat as engine oil and biodiesel offers an alternative to traditional fossil fuels, but further research and development are needed to optimize its performance and address its limitations.
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Frequently asked questions
Yes, animal oil can be used for car fuel. Biodiesel is a type of biofuel produced through biological processes rather than traditional geological processes. Animal fats are a popular source of biodiesel feedstocks because their cost is lower than vegetable oils and their market is much more limited.
Animal oils used for car fuel include beef tallow, pork lard, chicken fat, and turkey biodiesel.
Animal oil-based biodiesel has a higher cetane rating than vegetable- and petrol-based biodiesels, and it produces smaller increases in NOx than other biodiesel products. It also reduces exhaust gas emissions compared to reference diesel.
Animal oil-based biodiesel can have too high a sulfur content for highway use and can be too viscous. It can also be challenging to source enough animal fat to make it a sustainable primary source of fuel.
Yes, Green Earth Technologies Inc. sells G-Oil, a car engine oil made from animal fat, a slaughterhouse byproduct that is typically discarded en masse.
