How To Store Diesel Exhaust Fluid (DEF) in the Summer

Understanding Diesel Exhaust Fluid (DEF)

Diesel Exhaust Fluid (DEF) is a solution composed of 32.5% urea and 67.5% deionized water. It is used in Selective Catalytic Reduction (SCR) systems in diesel engines to reduce nitrogen oxide emissions. As a chemical solution, DEF is sensitive to temperature and contamination. Proper storage conditions are essential to maintaining its purity and effectiveness.

Effects of High Temperatures on DEF Quality

High temperatures can cause diesel exhaust fluid to degrade, reducing its ability to control emissions effectively. The ideal storage temperature for DEF is between 12°F (-11°C) and 86°F (30°C). Prolonged exposure to temperatures above this range can lead to the decomposition of urea, forming ammonia and carbon dioxide. This degradation not only decreases DEF’s efficiency but can also damage the SCR system.

Preventing DEF Crystallization in Summer

When DEF is exposed to temperatures above 86°F, it can begin to crystallize. DEF crystallization can block the DEF dosing system, leading to costly repairs and downtime. To prevent this, it is crucial to store DEF in a cool, shaded area, away from direct sunlight and heat sources.

Material Considerations for DEF Containers

DEF should be stored in containers made from high-density polyethylene (HDPE) or stainless steel, as these materials are resistant to urea and prevent contamination. Using unsuitable containers, such as those made from copper, brass, or aluminum, can lead to chemical reactions that degrade the DEF.

Container Size and Quantity Management

It’s essential to consider the size and quantity of DEF containers to match your usage. Using large containers for small quantities can increase the risk of contamination and evaporation, while small containers may not be cost-effective for large-scale operations.

Best Practices for Storing DEF

To preserve DEF quality during summer, store it in a climate-controlled environment with stable temperatures. If climate control is not possible, consider using insulation or shade structures to minimize temperature fluctuations. Humidity levels should also be monitored, as excessive moisture can lead to condensation inside containers, diluting the DEF and reducing its effectiveness.

Protecting DEF from Contamination

DEF is highly susceptible to contamination from dirt, oil, and other substances. Always store DEF in clean, sealed containers and avoid contact with other chemicals. Use dedicated equipment for DEF handling and transfer to prevent cross-contamination. Even trace amounts of impurities can cause significant issues in the SCR system.

Regular Inspection and Maintenance of DEF Storage

Regularly inspect DEF containers for signs of degradation, such as discoloration, crystallization, or unusual odors. These signs indicate that the DEF may be compromised and should be tested or replaced. Additionally, ensure that all storage containers are properly sealed to prevent contamination and evaporation.

Monitoring DEF Levels and Quality

Keep accurate records of DEF levels and quality to manage inventory effectively and avoid shortages. Testing DEF for urea concentration and contamination is essential, especially if the fluid has been stored for an extended period. Regular monitoring helps ensure that only high-quality DEF is used in your vehicles.

Transporting DEF in Hot Weather

Transporting DEF in hot weather requires special precautions to maintain its quality. Use insulated containers and avoid prolonged exposure to direct sunlight. If transporting DEF over long distances, consider using refrigerated transport to prevent temperature fluctuations that could compromise the fluid’s integrity.

Handling DEF Safely to Prevent Spills and Accidents

When handling DEF, always wear appropriate protective gear, including gloves and eye protection. Spills should be cleaned up immediately using absorbent materials, and the affected area should be thoroughly washed with water. Avoid inhaling DEF vapors and ensure adequate ventilation in storage and handling areas.

Long-Term Storage Solutions for DEF

For long-term storage, select a location with consistent, moderate temperatures and minimal exposure to sunlight. Underground or partially buried tanks can be a good option for maintaining stable temperatures. Ensure that the storage area is secure and protected from potential contamination sources.

Managing DEF Inventory to Prevent Expiry

DEF has a shelf life of approximately one year if stored under ideal conditions. To manage inventory effectively, use a first-in, first-out (FIFO) system to ensure that older stock is used before newer batches. Regularly rotate stock and test DEF quality to avoid using degraded fluid.

The Role of DEF in Emission Control Systems

Selective Catalytic Reduction (SCR) technology uses DEF to convert harmful nitrogen oxides (NOx) in diesel exhaust into harmless nitrogen and water. This process significantly reduces emissions and is a key component of modern diesel engines’ compliance with environmental regulations.

Ensuring Optimal DEF Performance in SCR Systems

To ensure optimal performance of SCR systems, it is crucial to use high-quality DEF and maintain proper storage conditions. Regularly check the DEF dosing system for blockages and ensure that the fluid is free from contaminants. Using substandard DEF can lead to increased emissions, engine damage, and costly repairs.

FAQs

How long can DEF be stored in summer?

DEF can typically be stored for up to one year under ideal conditions, including stable temperatures below 86°F. However, high summer temperatures can shorten its shelf life, so it is crucial to monitor storage conditions closely.

What happens if DEF is exposed to high temperatures?

Exposure to high temperatures can cause DEF to degrade, leading to crystallization and reduced effectiveness. This can result in blockages in the SCR system and increased emissions.

Can DEF freeze, and how should it be stored in winter?

Yes, DEF can freeze at 12°F (-11°C). During winter, it should be stored in a climate-controlled environment to prevent freezing. If freezing occurs, DEF can still be used once it thaws and returns to its liquid state.

Is it safe to store DEF in plastic containers?

DEF should be stored in containers made from high-density polyethylene (HDPE) or stainless steel. These materials are resistant to urea and prevent contamination. Avoid using containers made from copper, brass, or aluminum.

How can I prevent DEF contamination?

To prevent contamination, always store DEF in clean, sealed containers and use dedicated equipment for handling and transfer. Avoid contact with other chemicals and ensure that storage areas are clean and free from contaminants.

What should I do if I find crystallized DEF?

If DEF crystallization is observed, it may indicate that the fluid has been exposed to high temperatures or contamination. The affected DEF should be tested for quality and potentially replaced. Clean the dosing system to remove any blockages caused by crystallization.

Conclusion

Proper storage of Diesel Exhaust Fluid (DEF) during the summer is crucial to maintaining its effectiveness and ensuring the smooth operation of your vehicle’s emission control system. By understanding the impact of high temperatures on DEF, choosing the right storage containers, and following best practices for handling and transport, you can protect your investment and contribute to a cleaner environment. Regular inspection and monitoring, along with compliance with regulatory requirements, will help you maintain the quality and safety of your DEF supply. For more information about the DEF usage in various seasons and get high-quality DEF from Azure Chemical right now. Schedule your delivery.