Diesel Exhaust Fluid (DEF)
DEF is not a fuel additive; it is sprayed into the exhaust stream to turn pollution into nitrogen and water.
Feedstock: Natural Gas
Refinery Fraction: Natural Gas (Methane)
The Emission Filter
Diesel Exhaust Fluid (AdBlue) is a solution of high-purity urea. While used in diesel engines, its chemical origin is the steam-reforming of natural gas.
The Engineering Blueprint
- Refinery Parent: Methane / Ammonia
- Process: Haber-Bosch + Urea Synthesis
- Tray Position: Gas Fraction (Top)
The Realist Argument
Environmental compliance for the global trucking fleet is currently dependent on the natural gas supply chain. No gas, no DEF, no legal freight movement.
Human Impact & Utility
DEF reduces NOx emissions from heavy trucks by 90%, making modern logistics breathable.