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Dissertation/Thesis Abstract

Purification of Industrial Grade Urea for diesel exhaust pollution reduction
by Vatankhah, Iraj, M.S., California State University, Long Beach, 2017, 55; 10253261
Abstract (Summary)

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.

Indexing (document details)
Advisor: Mendez, Sergio
Commitee: Barjasteh, Ehsan, Yoozbashizadeh, Mahdi
School: California State University, Long Beach
Department: Chemical Engineering
School Location: United States -- California
Source: MAI 56/03M(E), Masters Abstracts International
Subjects: Chemical engineering, Environmental engineering
Keywords: Diesel exhaust fluid, Filtration, Urea
Publication Number: 10253261
ISBN: 978-1-369-57546-0
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