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http://dx.doi.org/10.7467/KSAE.2014.22.4.152

Analytical Study on Re-solidification Materials(Ammonium Carbonate Intermediates) for NOx Reduction of Exhaust Emissions in Diesel Engine with Solid SCR  

Shin, Jong Kook (Department of Mechanical Engineering, Graduate School, Hannam University)
Lee, Hoyeol (Department of Mechanical Engineering, Graduate School, Hannam University)
Yoon, Cheon Seog (Department of Mechanical Engineering, Hannam University)
Kim, Hongsuk (Engine Research Center, Korea Institute of Machinery & Materials)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.4, 2014 , pp. 152-159 More about this Journal
Abstract
Urea solution as a reductant of SCR has been widely used to reduce NOx emissions from diesel engine. But it has lots of problems which are freezing at low temperature due to liquid state, deposition of solid formation in the exhaust, dosing device, and complex package such as mixers for uniform concentration of ammonia. In order to overcome these obstacle, ammonium carbonate which is one of solid ammonium materials to produce ammonia gas directly by sublimation process is considered. Simple reactor with visible widow was designed to predict equilibrium temperature and pressure of ammonium carbonate. To simulate real operation conditions under automobile environment, several cycles of heating and cooling condition were settled, two different re-solidification materials were extracted from the reactor and visible window. Analytical study is performed to characterize these unknown materials by XRD(X-Ray Diffraction), FT-IR(Fourier Transform Infrared Spectroscopy), and EA(Elemental Analyzer). From analytical results, re-solidification materials from heating and cooling cycles are very similar to original material of ammonium carbonate.
Keywords
Solid SCR; Ammonium carbonate; Ammonium carbamate; XRD(X-Ray Diffraction); FT-IR(Fourier Transform Infrared Spectroscopy); EA(Elemental Analysis);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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