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Aspects of Efficient Parameter Estimation for Diesel Oxidation Catalysts

Björn Lundberg (Institutionen för kemi och kemiteknik, Kemisk reaktionsteknik)
Göteborg : Chalmers University of Technology, 2015. ISBN: 978-91-7597-171-1.- 95 s.
[Doktorsavhandling]

In this thesis the objective was to tune the model parameters of diesel oxidation catalysts (DOC) to measurement data from engine rig experiments in an efficient manner. The scope was however not limited to the algorithm of parameter search alone but instead included the whole process starting with the design of experiments. Different aspects of efficient parameter estimation of a full scale DOC were evaluated. This included different kinetic models, mass transfer resistance evaluation, experiments at both engine rig and lab scale, and parameter estimation algorithms. A specially developed detailed kinetic model, a method for parameter estimation using Multivariate Data Analysis, and a method for full scale engine rig experiments were all important products. In addition to these outputs some relevant conclusions were made based on the studies • Including internal mass transport parameter in the tuning improved the possibilities of achieving a good fit for the catalyst model • If internal mass transport is to be modeled the kinetic model cannot include parameters mimicking the effects of transport resistance • A detailed kinetic model improves the conditions for separating kinetics and mass transport but also increases the need for experimen-tal complexity at the same time as model instability may increase

Nyckelord: Exhaust Aftertreatment Modeling, DOC, Full Scale, Design of Experiments, Parameter Estimation, Engine Test Bench, MVDA, Kinetic modeling, Mass Transport Modeling



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Denna post skapades 2015-03-12. Senast ändrad 2015-03-17.
CPL Pubid: 213727

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Kemisk reaktionsteknik

Ämnesområden

Transport
Katalys
Molekylära transportprocesser i kemisk processteknik

Chalmers infrastruktur

C3SE/SNIC (Chalmers Centre for Computational Science and Engineering)

Relaterade publikationer

Inkluderade delarbeten:


New Methodology for Transient Engine Rig Experiments for Efficient Parameter Estimation


Parameter Estimation of a DOC from Engine Rig Experiments with a Discretized Catalyst Washcoat Model


Examination

Datum: 2015-04-10
Tid: 13:00
Lokal: KB
Opponent: Prof. Robert E. Hayes, Department of Chemical and Materials Engineering, University of Alberta, Canada

Ingår i serie

Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie 2015: 3852