Diesel Exhaust Fluid (DEF) is a urea-water solution that is injected into the exhaust system in order to reduce nitrogen oxides (NOx) emissions from a diesel engine. DEF urea, also known as Automotive Grade Urea (AGU), is a special type of prilled urea that is uncoated, free of formaldehyde, and very low in Biuret concentration. The cost of prilled DEF grade urea is 10-15% higher than Solid Urea Industrial (SUI) grade urea.
The objective of this project is to produce DEF solution from SUI grade instead of DEF grade urea. The DEF product should meet the International Organization for Standardization ISO 22241-1 standard. This will ensure the proper purity and concentration of urea. The sample of SUI grade urea was sent to an American Petroleum Institute (API) certified laboratory for DEF urea. The test result was compared with our results obtained in the CSULB chemical engineering laboratory for Biuret before and after the filtration process. The results show that we successfully reduced the Biuret level in SUI grade urea to the range of Automotive Grade Urea.
|Commitee:||Barjasteh, Ehsan, Yoozbashizadeh, Mahdi|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 56/03M(E), Masters Abstracts International|
|Subjects:||Chemical engineering, Environmental engineering|
|Keywords:||Diesel exhaust fluid, Filtration, Urea|
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