Journal ArticleDOI
Three-Way Catalytic Converter Modeling as a Modern Engineering Design Tool
TLDR
In this paper, the extents and limitations of applicability of state-of-the-art mathematical models of catalytic converter performance are discussed, and extensive comparisons between measured and computed instantaneous emissions over full cycles are presented.Abstract:
The competition to deliver ultra low emitting vehicles at a reasonable cost is driving the automotive industry to invest significant manpower and test lab resources in the design optimization of increasingly complex exhaust aftertreatment systems. Optimization can no longer be based on traditional approaches, which are intensive in hardware use and lab testing. This paper discusses the extents and limitations of applicability of state-of-the-art mathematical models of catalytic converter performance. In-house software from the authors' lab, already in use during the last decade in design optimization studies, updated with recent, important model improvements, is employed as a reference in this discussion. Emphasis is on the engineering methodology of the computational tools and their application, which covers quality assurance of input data, advanced parameter estimation procedures, and a suggested performance measure that drives the parameter estimation code to optimum results and also allows a less subjective assessment of model prediction accuracy. Extensive comparisons between measured and computed instantaneous emissions overfull cycles are presented, aiming to give a good picture of the capabilities of state of the art engineering models of automotive catalytic converter systems.read more
Citations
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Journal ArticleDOI
One-dimensional automotive catalyst modeling
TL;DR: In this article, the bulk gas equations of automotive catalysts are reformulated based on the governing equations of inviscid flow, while retaining full transient capability, which can be used to calibrate the simpler models by determining the actual residence time within the catalyst.
Journal ArticleDOI
Detailed surface reaction mechanism for Pt-catalyzed abatement of automotive exhaust gases
J. Koop,Olaf Deutschmann +1 more
TL;DR: In this article, a Pt-catalyzed conversion of automotive exhaust gases is presented based on a newly developed surface reaction mechanism consisting of 73 elementary-step like reactions among 22 surface and 11 gas-phase species.
Journal ArticleDOI
Mathematical modeling of monolith catalysts and reactors for gas phase reactions
TL;DR: In this article, a general monolith this article model for gas phase reactions is proposed and discussed for various modeling applications, with the focus on mass and heat transfer in monoliths, transient/dynamic modeling, gas flow uniformity and chemical kinetics effects on monolith reactor performance.
Journal ArticleDOI
Recent advances in numerical modeling of catalytic monolith reactors
Steffen Tischer,Olaf Deutschmann +1 more
TL;DR: In this paper, the development and improvement of numerical tools for the simulation of catalytic monolith reactors is discussed, and three numerical studies are shown: a catalytic combustion device with alternating active and inactive channels, a catalytically combustion monolith with spatially varying inlet conditions, and a NO x storage catalyst with alternating inlet condition.
Journal ArticleDOI
Kinetic Parameters Estimation for Three Way Catalyst Modeling
TL;DR: The emphasis in this work is restricted to predicting the light-off (cold-start emissions) in TWC, which is calibrated using 4 vehicle data sets (which use the FTP drive cycle) using iSIGHT software package.
References
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