#
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, Kemisk reaktionsteknik

### 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 tekniska högskola

KB

Opponent: Prof. Michiel Makkee, Delft University of Technology, the Netherlands