What is the density of automotive urea?
2 Answers
Generally, the density of automotive urea is calculated at room temperature of 20 degrees Celsius. The standard density of a saturated aqueous solution of automotive urea at 20 degrees Celsius is 1.146 per cubic. Automotive urea: Appearance is clear, colorless, odorless, non-toxic, and a transparent liquid with good fluidity. Function of automotive urea: To reduce vehicle exhaust emissions. Working principle of automotive urea: It reacts with nitrogen oxides in vehicle exhaust to produce nitrogen and oxygen, reducing the emissions of nitrogen oxides and harmful particulates. Composition of automotive urea: It consists of high-purity urea and deionized water, with strict requirements on its density, refractive index, alkalinity, metal ions, anions, impurities, and other contents.
As an automotive technology enthusiast, I've delved deep into diesel system knowledge. The density of automotive-grade urea solution is approximately 1.09 grams per cubic centimeter, which is the standard specification for AdBlue – designed to maintain 32.5% urea concentration for effective NOx reduction. Density serves as a critical parameter that fluctuates with temperature variations: most stable at 20°C, but potentially freezing and expanding below zero, rendering density readings inaccurate until thawed and remixed. In practical applications, significant density deviations (e.g., accidental dilution with water or other fluids) may trigger SCR system warnings or even nozzle clogging. I recommend using a simple hydrometer for pre-fill density verification to prevent operational errors. Maintaining proper density not only improves fuel efficiency but also extends catalyst lifespan – an economical and eco-friendly practice requiring only basic testing tools. Ultimately, precise density measurement constitutes a vital step for diesel vehicles' efficient emission control.
