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Diesel Document Fluid Research Paper

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Diesel exhaust fluid (DEF) is the combination of ammonia and water. Diesel exhaust fluid is used in any vehicle with a diesel engine. Diesel exhaust fluid is used in all on road commercial diesel trucks beginning in 2007. There were four tiers of legislation passed for all new diesel motors with 174 horsepower and up which applies to trains and ships built after 2016. When the Clean Air Act was passed by the government diesel motors were required to meet strict emissions standards. Selective catalytic reduction is a technology that uses a urea-based diesel exhaust fluid (DEF) and a catalytic converter to significantly reduce nitrogen oxides (NOx). The SCR is the most current technology in meeting 2010 emission requirements. A light mist of …show more content…
Traditionally DEF is made from type 3 DI water which is not as purified as type 1 DI water. DEF is normally mixed at about 60 degrees Fahrenheit and drops 22 degrees Fahrenheit. The process of N2DEF begins with water heated to 140 degrees Fahrenheit. The city water is filtered through a sediment filter and carbon filter (GAC) at .5 micron. Next the water is demineralized. The water passes through a bed of a strong acid cation and strong base anion. This is a slow process and reduces the water temperature to about 100 degrees Fahrenheit. Common cations removed are Calcium, Magnesium, Iron, Sodium, Manganese, Sodium, and Hydrogen. Common anions removed are Chlorides, Sulfates, Nitrates, Carbonates, Silica, and Hydroxyl. When the anion and cation beds are separated the highest quality of deionized water can be produced. This pure water created has a pH of 9.5-10 when the process is finished. The DI water with a higher pH releases more ammonia from the urea and cleans the pre-filter and the …show more content…
“The concentration of urea at 32.5% is ideal to provide the lowest freezing point” (Cummins, 2009). The SCR systems are calibrated for that concentration of urea so optimum NOx will be reduced. When the water and urea is blended at a higher temperature and purer water the product created is a clear homogenous mixture. The American Petroleum Institute requires that diesel exhaust fluid be bright and clear which for N2DEF is no problem at any temperature. The API heats the product to 68 degrees when analyzing the product, temporarily fixing the problem with the largely manufactured DEF. When DEF is cooled down it returns to the foggy greyish

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