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LNT의 기하학적 형상이 NOx 전환 효율에 미치는 영향에 대한 수치적 연구

Title
LNT의 기하학적 형상이 NOx 전환 효율에 미치는 영향에 대한 수치적 연구
Other Titles
Simulation on the Effect of Geometric Parameters on the performance of the Lean NOx Trap Catalyst
Author
김우승
Keywords
LNT(Lean NOx Trap, 흡장형 NOx 촉매); Diesel engine(디젤 엔진); SV(Space Velocity, 공간속도); NOx conversion efficiency(NOx 전환율)
Issue Date
2008-06
Publisher
한국자동차공학회
Citation
한국자동차공학회 2008년 창립 30주년 기념 학술대회 논문집, v. 1, Page. 340-345
Abstract
he lean NOx trap (LNT) is one of the promising technologies for the NOx reduction of gasoline lean bum and diesel engines to meet more stringent future emission regulations such as EURO 5 or 6. The adsorption sites in the wash coat take up NOx from engine exhaust gas during the lean condition and store NOx as nitrates. After running at the lean condition for a period of time, LNT is operated under the rich condition for a few seconds. Therefore, adsorbed NOx is released from the BaO sites and then reduced on the Pt sites. In this paper, a one-dimensional two-phase model of an adsorptive catalytic monolith reactor has been used to predict the performance of LNT in terms of NOx and CO conversion efficiency. The parametric investigations are numerically performed to examine the effect of the volume of LNT with various lengths and cross-sectional areas, GHSV(Gas Hourly Space Velocity), and geometric parameters such as cell density and wall thickness on the performance of LNT. An increase of GHSV decreases the NOx and CO conversion efficiency.
URI
http://www.dbpia.co.kr/Article/NODE01126690http://repository.hanyang.ac.kr/handle/20.500.11754/104590
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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