1、Understanding Automotive Grade Urea: A Key Component in Urea Water

Urea is a nitrogen-containing compound that is naturally produced in the human body and is also a component of fertilizers. In automotive contexts, it is primarily used in Selective Catalytic Reduction (SCR) systems to reduce nitrogen oxides (NOx) emissions from diesel engines.

2、Differences Between Automotive Urea and Agricultural Urea

Discover the key differences between automotive-grade urea for SCR systems and agricultural-grade urea fertilizer 46% nitrogen. Learn about composition, uses, and standards.

3、Basic Knowledge of Urea Fertilizer

Urea is the main source of nitrogen because of its high content of Nitrogen, high solubility and polar. However, urea is easily lost through several processes, such as ammonium volatillation, alkylation, grinding and denitrification.

4、A Comprehensive Analysis of Urea Fertilizer Composition

Urea fertilizer is essentially made of urea, the chemical backbone of which is CO (NH2)2 – a molecule composed of carbon, oxygen and nitrogen in a ratio that is around 46 per cent nitrogen by weight.

What Is the Composition of Urea Fertilizer? Breaking Down Its Key

Urea fertilizer is a widely used nitrogen-based fertilizer that contains around 46% nitrogen. The production of urea fertilizer involves the combination of ammonia and carbon dioxide.

UREA(+Nutrition, OEM) Fertilizer and Vehicle Grade

Automobile systems uses: Urea is used in SNCR and SCR reactions to reduce the NOx pollutants in exhaust gases from combustion, for example, from power plants and diesel engines. The BlueTec system, for example, injects water-based urea solution into the exhaust system.

What Is Urea Fertilizer Made Out Of

Urea fertilizer is primarily composed of nitrogen in the form of carbamide (CH4N2O), making it a potent nitrogen source extensively utilized in agriculture.

Urea & Automotive Urea: Feeding the World and Cleaning the Air

Urea isn’t just a solo act — it’s a core building block in dozens of fertilizer products used worldwide. Thanks to its high nitrogen content, solubility, and compatibility with other nutrients, it’s a go-to ingredient in both simple and complex formulations.

Understanding Urea Nitrogen: Composition and Advantages

Urea (CO (NH₂)₂) is a white crystalline organic compound containing 46% nitrogen, making it the highest nitrogen-content solid fertilizer available. It is highly soluble in water and can be easily absorbed by plants when applied correctly.

What Is in Urea Fertilizer? Breakdown Of Ingredients

A: Urea fertilizer is a synthetic compound with a high nitrogen content, making it a concentrated source of nitrogen. Other nitrogen-rich fertilizers, such as ammonium nitrate, have a lower nitrogen content and may be more expensive.

Automotive urea is an important industrial chemical primarily used in vehicle exhaust treatment systems. Its main function is to reduce environmental pollution caused by diesel engines during emission processes while improving combustion efficiency. Automotive urea is a solution produced by reacting sodium carbonate and urea, with its main components being sodium carbonate and urea.

I. Main Components of Automotive Urea

1. Sodium Carbonate (Na₂CO₃): Sodium carbonate is an inorganic salt in the form of white crystals, highly soluble in water. In automotive urea, it primarily regulates pH, maintaining an alkaline solution that facilitates urea decomposition and absorption.

2. Urea (NH₄NO₃): Urea is an organic nitrogen fertilizer with the chemical formula NH₄NO₃. In automotive urea, it serves as a reducing agent in the Selective Catalytic Reduction (SCR) technology, converting NOₓ (nitrogen oxides) into N₂ (nitrogen gas) and H₂O (water).

II. Production Process of Automotive Urea

The production of automotive urea involves several steps: raw material preparation, chemical reaction, product separation, and post-treatment.

1. Raw Material Preparation: The process requires urea (in granular or powdered form) and sodium carbonate (in solid particulate form).

2. Chemical Reaction: Urea and sodium carbonate are mixed in specific ratios and react under controlled temperature conditions to form the urea solution. Parameters such as temperature, pressure, and reaction time must be carefully managed to ensure smooth progress.

3. Product Separation: After the reaction, impurities and insoluble substances are removed from the solution using methods like centrifugation, filtration, or evaporation.

4. Post-Treatment: The purified solution undergoes dilution, concentration, crystallization, or drying to adjust its concentration and purity for different applications.

III. Applications of Automotive Urea

Automotive urea is primarily used in diesel engine exhaust treatment systems. Its mechanism involves urea reacting with NOₓ in high-temperature exhaust gases via SCR technology, converting pollutants into harmless nitrogen gas (N₂) and water vapor (H₂O). This reduces NOₓ emissions and enhances engine efficiency.

IV. Importance of Automotive Urea

1. Environmental Protection: Automotive urea reduces NOₓ emissions from diesel engines by 60–80%, significantly lowering atmospheric pollution.

2. Energy Savings and Emission Reduction: By decreasing NOₓ output, it contributes to fuel economy goals. Diesel engines using urea consume 5–10% less fuel per 100 kilometers compared to those without it.

3. Engine Performance Improvement: Urea enhances combustion efficiency, reducing fuel consumption by 10–20% under identical operating conditions.

4. Advancing Environmental Industries: The development of automotive urea has spurred technological innovation and market expansion in eco-friendly industries. Globally, numerous companies now specialize in its research, production, and sales, forming a robust industrial chain.

automotive urea—composed mainly of sodium carbonate and urea—is a critical industrial chemical for vehicular exhaust treatment. Proper use of automotive urea mitigates diesel engine pollution, protects the environment, boosts engine efficiency, and supports the growth of green industries.