Experiments and Simulations of an Automotive Exhaust Thermoelectric System

Automotive catalysts generally lose-agtivity during vehicle operation due to several well-known deactivation mechanisms. To gain a more fundamental understanding of catalyst deactivation, the microscopic details of fresh and vehicle-aged commercial pelleted automotive exhaust catalysts containing Pt, Pd and Rh were studied by employing Analytical Electron Microscopy (AEM). Two different vehicle-aged samples containing similar poison levels but having different catalytic activities (denoted better and poorer) were selected for this study.The general microstructure of the supports and the noble metal particles of the two catalysts looks similar; the noble metal particles were generally found to be spherical and often faceted. However, the average noble metal particle size on the poorer catalyst (21 nm) was larger than that on the better catalyst (16 nm). These sizes represent a significant increase over that found on the fresh catalyst (8 nm). The activity of these catalysts decreases as the observed particle size increases.

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Expansion of PM into automotive exhaust systems

Metal Powder Report ◽

10.1016/s0026-0657(97)84739-x ◽

1997 ◽

Vol 53 (7-8) ◽

pp. 43

Author(s):

J Mandel

Keyword(s):

Automotive Exhaust ◽

Exhaust Systems

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PRODUCTION PROCESS OF AN AUTOMOTIVE EXHAUST

Journal of Management & Technology ◽

10.24279/jmt.v4i2.633 ◽

2016 ◽

Vol 4 (2) ◽

Author(s):

Tatiane Ribeiro Santos ◽

Adriele Seabra ◽

Alison Pereira ◽

Maria Aparecida Moreira ◽

Mariane Pereira

Keyword(s):

Production Process ◽

Automotive Exhaust

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PRODUCTION PROCESS OF AN AUTOMOTIVE EXHAUST

Journal of Management & Technology ◽

10.24279/jm-p;t.v4i2.633 ◽

2016 ◽

Vol 4 (2) ◽

Author(s):

Tatiane Ribeiro Santos ◽

Adriele Seabra ◽

Alison Pereira ◽

Maria Aparecida Moreira ◽

Mariane Pereira

Keyword(s):

Production Process ◽

Automotive Exhaust

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J & L TYPE 409/409 HP

Alloy Digest ◽

10.31399/asm.ad.ss0743 ◽

1999 ◽

Vol 48 (5) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Stainless Steels ◽

Heat Treating ◽

Automotive Exhaust ◽

Ferritic Stainless Steels ◽

Resistance To Oxidation ◽

Specialty Steel ◽

Oxidation And Corrosion

Abstract J and L Types 409 HP are ferritic stainless steels with 11% chromium. They exhibit an excellent combination of good formability, economy, and resistance to oxidation and corrosion. It is typically used in automotive exhaust systems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-743. Producer or source: J & L Specialty Steel Inc.

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AK STEEL 439

Alloy Digest ◽

10.31399/asm.ad.ss0874 ◽

2003 ◽

Vol 52 (2) ◽

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Oxidation Resistance ◽

Automotive Exhaust ◽

Temperature Performance ◽

Steel Corporation

Abstract AK Steel 439 has superior oxidation resistance and corrosion resistance compared to Type 409, which makes 439 attractive for numerous automotive exhaust applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-874. Producer or source: AK Steel Corporation.

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AK STEEL 409 ULTRA FORM

Alloy Digest ◽

10.31399/asm.ad.ss0990 ◽

2007 ◽

Vol 56 (4) ◽

Keyword(s):

Stainless Steel ◽

High Temperature ◽

Carbon Steel ◽

Physical Properties ◽

Tensile Properties ◽

Corrosion Protection ◽

Automotive Exhaust ◽

Standard Type ◽

Temperature Performance ◽

Complex Shapes

Abstract AK Steel 409 Ultra Form was created for applications needing oxidation or corrosion protection beyond the capability of carbon steel and some coated steels. AK Steel 409 Ultra Form is more formable than standard Type 409 stainless steel and is particularly suitable for parts requiring more complex shapes and improved weldability. Examples of applications include automotive exhaust tubing and stampings. This datasheet provides information on physical properties, hardness, elasticity, and tensile properties as well as deformation. It also includes information on high temperature performance as well as forming and joining. Filing Code: SS-990. Producer or source: AK Steel, Butler Operations.

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Mass and Heat Transfer Coefficients in Automotive Exhaust Catalytic Converter Channels

Catalysts ◽

10.3390/catal9060507 ◽

2019 ◽

Vol 9 (6) ◽

pp. 507

Author(s):

Chrysovalantis C. Templis ◽

Nikos G. Papayannakos

Keyword(s):

Heat Transfer ◽

Flow Reactor ◽

Catalytic Converter ◽

Reaction Rates ◽

Cfd Model ◽

Automotive Exhaust ◽

Transfer Coefficients ◽

Heat Transfer Coefficients ◽

Wide Range ◽

Mass And Heat Transfer

Mass and heat transfer coefficients (MTC and HTC) in automotive exhaust catalytic monolith channels are estimated and correlated for a wide range of gas velocities and prevailing conditions of small up to real size converters. The coefficient estimation is based on a two dimensional computational fluid dynamic (2-D CFD) model developed in Comsol Multiphysics, taking into account catalytic rates of a real catalytic converter. The effect of channel size and reaction rates on mass and heat transfer coefficients and the applicability of the proposed correlations at different conditions are discussed. The correlations proposed predict very satisfactorily the mass and heat transfer coefficients calculated from the 2-D CFD model along the channel length. The use of a one dimensional (1-D) simplified model that couples a plug flow reactor (PFR) with mass transport and heat transport effects using the mass and heat transfer correlations of this study is proved to be appropriate for the simulation of the monolith channel operation.

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