DEF - Diesel Exhaust Fluid)

About DEF - Diesel Exhaust Fluid)

Long Description

Diesel Exhaust Fluid (DEF) is a non-toxic, colorless, and odorless solution made from high-purity urea (32.5%) and deionized water (67.5%). It is used in modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems to reduce harmful nitrogen oxide (NOx) emissions. DEF is stored in a separate tank and injected into the exhaust stream, where it helps convert pollutants into harmless nitrogen and water vapor.

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Key Specifications

• Composition: 32.5% Urea + 67.5% Deionized Water
• Standard: ISO 22241
• Appearance: Clear liquid
• Odor: Odorless (may have slight ammonia smell)
• Freezing Point: -11C
• Density: 1.09 g/cm at 20C
• pH Value: 9.010.0
• Toxicity: Non-toxic, non-flammable, non-hazardous
• Storage Life: Typically 12 years if stored properly

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Applications

• Heavy-duty diesel trucks and buses
• Passenger diesel vehicles with SCR systems
• Construction and mining equipment
• Agricultural machinery (tractors, harvesters)
• Marine diesel engines
• Power generators using diesel engines

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Function

DEF is injected into the exhaust gases before they pass through the SCR catalyst. Under high temperature:

1. DEF decomposes into ammonia (NH) and carbon dioxide (CO).
2. Ammonia reacts with nitrogen oxides (NOx).
3. This chemical reaction converts harmful NOx into:
   • Nitrogen (N)
   • Water vapor (HO)

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Benefits

• Reduces Emissions: Cuts NOx emissions by up to 90%
• Environmental Compliance: Meets BS6, Euro 6, EPA emission norms
• Improves Air Quality: Reduces smog and pollution
• Fuel Efficiency: Enables optimized engine performance
• Engine Longevity: Cleaner exhaust system reduces wear
• Non-Hazardous: Safe to handle and store
• Regulatory Requirement: Mandatory for modern diesel vehicles with SCR

Reliable Solution for Automotive Emissions

Diesel Exhaust Fluid (DEF) is formulated for use in automotive applications to help maintain compliance with emission standards. Its composition allows it to efficiently convert harmful nitrogen oxide emissions into harmless nitrogen and water, contributing to decreased pollution from diesel engines.


Optimized Chemical Properties

With its clear liquid appearance, DEF boasts a density of 1.09 g/cm3 at 20C. Its nearly odorless nature, occasionally accompanied by a light ammonia scent, makes it easy to handle and apply in industrial environments focused on vehicle servicing and emissions management.


Versatility in Application and Distribution

DEF serves as a PVC solvent and a double component adhesive, suitable for various automotive needs. Offered by distributors, manufacturers, suppliers, and traders, it ensures widespread availability to meet the demands of modern automotive care and compliance requirements.