AdBlue, Automotive urea, TGU
AdBlue, automotive urea, and TGU (Technical Grade Urea) are all the same product. They refer to a specific type of urea solution that’s used in diesel engines to reduce nitrogen oxide (NOx) emissions.
Here’s a breakdown of the terms:
- AdBlue: This is a brand name for a specific type of automotive urea solution.
- Automotive urea: This is the general term for urea solutions designed for use in diesel engines.
- TGU (Technical Grade Urea): This is the chemical term for the type of urea used in AdBlue.
So, whether you hear AdBlue, automotive urea, or TGU, they all refer to the same product.
Chemical Composition
- Urea: The primary component is urea, a colorless, odorless crystalline compound with the chemical formula CO(NH₂)₂.
- Water: Urea is dissolved in deionized water.
Urea is a simple organic compound with the chemical formula CO(NH₂)₂. Its molecular structure can be represented as follows:
Specifications
- Concentration: Typically 32.5% urea by mass in water.
- Purity: Must meet specific purity standards to ensure optimal performance in diesel engines.
- pH: Neutral or slightly alkaline.
- Freezing point: Varies depending on concentration but typically around -11°C (12°F).
- Storage: Should be stored in a dry, cool place, protected from direct sunlight.
Function in Diesel Engines
- Injection: AdBlue is injected into the exhaust stream after the diesel particulate filter (DPF).
- Reaction: AdBlue reacts with NOx in the presence of a catalyst to form nitrogen and water, which are less harmful emissions.
- Emission Reduction: This process significantly reduces NOx emissions, improving air quality.
Common Uses
- Heavy-duty trucks: Used extensively in commercial vehicles for long-haul transportation.
- Off-road equipment: Employed in construction and agricultural machinery.
- Marine engines: Used in large marine vessels to meet emissions regulations
Important Considerations
- Compatibility: Ensure compatibility with the specific diesel engine and aftertreatment system.
- Storage and Handling: Proper storage and handling are crucial to prevent contamination and degradation.
- Regulatory Compliance: AdBlue usage must comply with local and international emissions regulations.
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