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http://dx.doi.org/10.3795/KSME-B.2015.39.2.177

Experimental Study on Characteristics of Ammonia Conversion Rate of Urea Aqueous Solution in 250℃ Exhaust Pipe  

Ku, Kun Woo (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Park, Hong Min (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Hong, Jung Goo (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.2, 2015 , pp. 177-182 More about this Journal
Abstract
The NOx emissions from diesel engines and industrial boilers are a major cause of environmental pollution. The selective catalytic reduction of urea is an aftertreatment technology that is widely used for the reduction of NOx emissions. The objective of this study was to investigate the characteristics of the thermal decomposition of a urea aqueous solution using laboratory-scale experimental equipment under conditions similar to those of marine diesel engines. A 40 wt. urea aqueous solution was used in this study. It was found that the total conversion rate varied with the inflow gas conditions and flow rates of the urea aqueous solution. In addition, there were conversion rate differences between NH3 and HNCO. At inflow gas temperature conditions of $210^{\circ}C$ and $250^{\circ}C$, the $NH_3$ conversion rate was found to be higher than that of the HNCO, depending on the residence time.
Keywords
Urea Aqueous Solution; Thermal Decomposition; Conversion Rate; $NH_3$; HNCO;
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Times Cited By KSCI : 1  (Citation Analysis)
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