30-credits – Catching ash: Methodology for ash accumulation in diesel particulate filters i Sodertalje

Scania genomgår nu en transformation från att vara en leverantör av lastbilar, bussar och motorer till en leverantör av kompletta och hållbara transportlösningar.

Thesis project at Scania is an excellent way of making contacts for your future working life. Many of our current employees started their career with a thesis project.

Background:
Scania is undergoing a transformation from being a supplier of trucks, buses and engines to a supplier of complete and sustainable transport solutions. As part of that strive, the exhaust aftertreatment system is an important component to minimize the environmental impact from the individual trucks.

The aftertreatment system in a Scania truck is a complex system, with different components targeting specific pollutants. One of the components is the diesel particulate filter (DPF), which aims to minimize emissions of harmful particles to the environment. The soot particles from the engine are trapped and oxidized in the filter leaving a small amount of ash behind. The ash accumulation has a major impact on the lifetime performance of the DPF. Nevertheless, the ash accumulation phenomena are not well understood, especially when it comes to renewable fuels.

The main source of information about ash accumulation in DPFs is based on filters from field tests on vehicles. These tests are time consuming and costly. Hence, an accelerated method for ash accumulation would be very beneficial to understand the ash build-up and would help to improve the performance and durability of the DPF.

Target:
The target of the thesis project is to propose a methodology and rig design for studying ash accumulation in diesel particulate filters.

Assignment:
In this thesis project you will design a test equipment for accelerated test of ash deposits in DPF, starting with a review of the state of the art techniques, followed by an actual design of the proposed test rig. This work will be in close contact with different experts on rig design and exhaust aftertreatment at Scania and KTH.

You will work in a dedicated team of driven experts in the field of exhaust aftertreatment.

The work will be performed at Scania Materials Technology in Södertälje with cooperation with the department of Machine Design and the department of Chemical Engineering and Technology at KTH.

Education:
MSc/Civilingenjör in: Chemical Engineering, Materials Technology or Engineering Physics.

Number of students: 1
Start date: January 2019
Estimated time needed: 20 weeks

Contact persons and supervisors:
Thesis Supervisor: Anders Ersson, , phone: 08 – 553 514 20
Group Manager: Martina Levin, , phone: 08 – 553 825 13