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Lining Solutions for The Storage Of Biodiesel Or Renewable Feedstocks

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The most dangerous phrase in business, “We’ve always done it that way”, has never been more apt. It cannot be assumed that these linings, with proven track record in storage and processing fossil fuels, will provide the same level of asset protection in biofuels storage and biorefining processes. Likewise, the use of “generic” equivalents offers greater risks as the technology used does not define the performance.

Product Number: 51323-19459-SG
Author: Selwyn E Williams, Michael Harrison
Publication Date: 2023
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$20.00
$20.00

Global demand for renewable and bio-based fuels is expected to grow with political and consumer led mandates on reducing greenhouse gases and achieving carbon neutrality. A typical Biofuel production facility faces numerous performance challenges which are unique to storage and processing of feedstocks. With the increased move to renewable feedstocks and fuels the tank owners want increasing flexibility in their storage options and there is a need for the tanks used, traditionally, for fossil based fuels and feedstocks to be able to store the likes of Waste Cooking Oil, Meat Tallows, Pyrolysis Oils as well as Biodiesel and Sustainable Aviation Fuel (SAF) As the chemistry of renewable feedstocks differ considerably from fossil fuels, it is essential to confirm the chemical resistance of linings used in these storage tanks. It cannot be assumed that linings, traditionally used for Crude Oil, will offer the same protection.

Ethanol poses a well-known challenge to store due to it being very aggressive to epoxy coatings especially at elevated temperature. Biofuels can degrade when in contact with water. The degradation products, free fatty acids and free water can be very aggressive to the lining on carbon steel tanks. This attack on the lining can eventually lead to lining failure and corrosion of the metal of the storage tank.

Sherwin Williams has tested several generic lining technologies in various feedstocks over a range of temperatures. Some linings are showing no degradation at the lower exposure temperatures of 71°C [160°F], besides slight discoloration; however, higher temperature exposures start to show greater deviations from the performance seen in fossil-based hydrocarbons. Exposures in this study has been in Beef Tallow and Waste Cooking Oil at 71°C (160°F), 82°C (180°F) and latterly (2nd phase of tests) at 93°C (200°F). The addition of water to these feedstocks had negligible effect on the performance of the lining. Testing is ongoing, including the higher temperature exposures and will continue for at least 24 months.

Global demand for renewable and bio-based fuels is expected to grow with political and consumer led mandates on reducing greenhouse gases and achieving carbon neutrality. A typical Biofuel production facility faces numerous performance challenges which are unique to storage and processing of feedstocks. With the increased move to renewable feedstocks and fuels the tank owners want increasing flexibility in their storage options and there is a need for the tanks used, traditionally, for fossil based fuels and feedstocks to be able to store the likes of Waste Cooking Oil, Meat Tallows, Pyrolysis Oils as well as Biodiesel and Sustainable Aviation Fuel (SAF) As the chemistry of renewable feedstocks differ considerably from fossil fuels, it is essential to confirm the chemical resistance of linings used in these storage tanks. It cannot be assumed that linings, traditionally used for Crude Oil, will offer the same protection.

Ethanol poses a well-known challenge to store due to it being very aggressive to epoxy coatings especially at elevated temperature. Biofuels can degrade when in contact with water. The degradation products, free fatty acids and free water can be very aggressive to the lining on carbon steel tanks. This attack on the lining can eventually lead to lining failure and corrosion of the metal of the storage tank.

Sherwin Williams has tested several generic lining technologies in various feedstocks over a range of temperatures. Some linings are showing no degradation at the lower exposure temperatures of 71°C [160°F], besides slight discoloration; however, higher temperature exposures start to show greater deviations from the performance seen in fossil-based hydrocarbons. Exposures in this study has been in Beef Tallow and Waste Cooking Oil at 71°C (160°F), 82°C (180°F) and latterly (2nd phase of tests) at 93°C (200°F). The addition of water to these feedstocks had negligible effect on the performance of the lining. Testing is ongoing, including the higher temperature exposures and will continue for at least 24 months.

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