Analysis of carbon black oxidation
Doktorsavhandling, 2017
diesel particulate filter (DPF)
deconvolution
inverse problems
residence time distribution
computational fluid dynamics (CFD)
kinetic modeling
transient kinetics
Författare
Soheil Soltani
Chalmers, Kemi och kemiteknik, Kemiteknik
Time Resolution in Transient Kinetics
Springer Proceedings in Mathematics and Statistics: 3rd Annual Workshop on Inverse Problems, 2013, Stockholm, Sweden, 2-6 May 2013,;Vol. 120(2015)p. 81-96
Paper i proceeding
Enhancement of time resolution in transient kinetics
Chemical Engineering Journal,;Vol. 264(2015)p. 188-196
Artikel i vetenskaplig tidskrift
Kinetic analysis of O2- and NO2-based oxidation of synthetic soot
Journal of Physical Chemistry C,;Vol. 117(2013)p. 522-531
Artikel i vetenskaplig tidskrift
CFD Characerization of Monolithic Reactors for Kinetic Studies
Canadian Journal of Chemical Engineering,;Vol. 92(2014)p. 1570-1578
Artikel i vetenskaplig tidskrift
Soltani, S., Andersson, R., Andersson, B., Oxidation of synthetic soot with NO2 in the presence of water vapor and oxygen
The accumulation of PM in the filter has adverse effects on fuel consumption, and, therefore, the collected PM has to be burned regularly in a process known as regeneration. PM is largely composed of carbon, and regeneration can be achieved by letting it react with oxygen that is present in the exhaust in abundance. This, however, requires temperatures as high as 500 C that can be achieved with the combustion of additional fuel in the exhaust line known as “active regeneration.” In addition to the consequent fuel penalty, such high temperatures increase the risk of melting the filter due to uncontrolled chemical reactions. An auxiliary approach that can largely circumvent these drawbacks would be to utilize NO2; another component of diesel exhaust that can burn PM at the same temperature as diesel exhaust and is therefore referred to as passive regeneration. For this reason, it is undoubtedly beneficial to have control algorithms that account for the NO2-assisted reaction and that determine the optimal frequency of active regeneration cycles. Such algorithms would be strongly dependent on the mathematical models that are used to predict the required conditions for achieving optimality.
The main focus of this thesis is on the reaction between PM and NO2. Within this study, experimental and theoretical methods were developed to study this reaction in a more fundamental way. The achievements of this study include guidelines for conducting high-quality experiments, the method of sample preparation so that repeatable and consistent experimental results can be obtained, simulation methods for acquiring insight into the fundamental aspects of the reaction between PM and NO2, and a kinetic model for this reaction that also includes the influence of other components of diesel exhaust such as water vapor and oxygen that have promoting effects on the rate of the reaction.
Drivkrafter
Hållbar utveckling
Ämneskategorier
Energiteknik
Kemiska processer
Annan kemiteknik
ISBN
978-91-7597-564-1
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4245
Utgivare
Chalmers
KB
Opponent: Prof. Michiel Makkee, Delft University of Technology, the Netherlands