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가솔린 엔진의 배출가스 저감을 위한 듀얼 모노리스형 촉매변환기의 형상 및 귀금속 촉매의 축방향 분포 최적화

Title
가솔린 엔진의 배출가스 저감을 위한 듀얼 모노리스형 촉매변환기의 형상 및 귀금속 촉매의 축방향 분포 최적화
Other Titles
Optimization of Geometric Shape and Axial Noble Metal Distribution in a Dual Monolithic Catalytic Converter for Emissions Reduction of Gasoline Engine
Author
김우승
Keywords
Catalyst(촉매); Catalytic Converter(촉매변환기); Axial Distribution(축방향 분포); Dual Monolith(듀얼 모노리스); Mathematical Modeling(수학적 모델링); Numerical Analysis(수치 해석); Optimization(최적화)
Issue Date
2008-06
Publisher
한국자동차공학회
Citation
한국자동차공학회 2008년 창립 30주년 기념 학술대회 논문집, v. 1, Page. 3-12
Abstract
In practical applications, monolithic catalytic converters are operated at non-isothermal conditions. In this case, the active metal distribution along the length of the converter may influence its performance. Indeed, better conversions can be achieved by controlling the distribution of the same quantity of active material. In this study, a one-dimensional catalyst model has been adopted to predict the transient thermal and conversion characteristics of a dual monolithic catalytic converter with Platinum/Rhodium (Pt/Rh) catalysts. The optimal design of a longitudinal noble metal distribution of a fixed amount of catalyst is investigated to obtain the best performance of a dual monolithic catalytic converter by using a micro genetic algorithm with consideration of heat transfer, mass transfer, and chemical reaction in the monolith during FTP-75 cycle. The optimal axial distribution of the catalyst is determined by solving the multi-objective optimization problems which are to minimize both the CO cumulative emissions during FTP-75 cycle, and the difference between the integral value of a catalyst distribution function over the monolith volume and total catalytic surface area over total monolith volume. The parametric investigations for three cell densities of the front monolith are carried out by varying the volume ratio between front and rear monoliths with fixed volume and cell density of the rear monolith.
URI
http://www.dbpia.co.kr/Article/NODE01126634http://repository.hanyang.ac.kr/handle/20.500.11754/104593
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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