Renewable diesel is a true hydrocarbon just like diesel and meets ASTM International’s standard for Diesel Fuel Oils (D-975). It has a different molecular structure from biodiesel, which is a methyl-ester. Because of this structural difference, renewable diesel is a superior product with a higher cetane index than typical ultra-low sulfur diesel (ULSD), and unlike biodiesel, an energy density value equivalent to ULSD.
Renewable diesel can be distributed using the established petroleum pipeline system, while biodiesel requires truck or rail transport. Additionally, renewable diesel has no cold-flow issues and won’t thicken and clog engines in cold weather as may happen with biodiesel.
With the combination of Darling’s ability to provide low-cost carbon-friendly feedstocks – in the form of tallow from recycled animal by-product and used cooking oil collected from restaurants – and Valero’s experience through its subsidiaries as the world’s largest independent petroleum refiner and marketer, Diamond Green Diesel is a sustainable biofuel facility that is helping meet America’s growing renewable energy demands.
Rendered fats offer a perfect feedstock for the production of alternative fuels. Because its raw stock is recycled from collected food residuals, the biofuels produced from rendered grease is not diminishing the food supply and doesn’t require fertile land space to be cleared to produce it.
Diamond Green Diesel’s feedstocks are shipped by rail or truck, where it is processed into renewable diesel for shipping by pipeline or vessel to markets throughout the United States.