Project

In situ Raman spectroscopy on electrocatalytic NOx removal

Publisher

Supervisor

Location

Greater Copenhagen area

Challenge: NOx is an air pollutant harmful to both human health and environment, for which reason NOx emissions must be lowered. A major source of NOx emissions is vehicles, and especially for diesel vehicles there is a challenge in removing NOx efficiently from the exhaust. Electrochemical reduction of NOx is a novel technology for NOx removal from diesel exhaust. This technology is based on NOx reduction in a ceramic, electrochemical cell. However, a major challenge in the development of this technology is to achieve a sufficiently high selectivity towards NOx conversion on the electrodes.

Idea: Addition of NOx storage compounds (e.g. BaO/Ba(NO3)2 or K2O/KNO3) to the electrodes has been proven to increase the NOx conversion. This is believed to some extent to be due to NOx getting stored as nitrate on the electrode surface prior to the electrochemical reduction. Still, experimental evidence of the NOx storage process on the ceramic electrodes is missing. Raman spectroscopy is a method which can be used to investigate the NOx storage and conversion process in situ, i.e. at realistic conditions with respect to temperature, gas composition and electrical potential. The application of in situ Raman spectroscopy will provide new insight regarding the NOx storage and conversion processes, which will be crucial for the further development of this technology

Student task: This project is mainly experimental. You will prepare electrodes for electrochemical NOx reduction including adding a NOx storage compound to the electrodes by infiltration. In our new Raman lab you will conduct in situ experiments, in which you monitor changes in both the ceramic electrodes and the adsorbed gaseous species during the NOx conversion. In addition to this the electrodes before and after test will be characterized by for instance electron microscopy.

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Contact

Company / Organization

DTU Energi

Name

Marie Lund Traulsen

Position

Adjunkt

Mail

matr@dtu.dk

Supervisor info

BSc in Chemistry and Technology

Supervisor

Marie Lund Traulsen

Co-supervisors

Kent Kammer Hansen

ECTS credits

15 - 30

Type

BSc project, MSc thesis

BSc in Physics and Nanotechnology

Supervisor

Marie Lund Traulsen

Co-supervisors

Kent Kammer Hansen

ECTS credits

15 - 30

Type

BSc project, MSc thesis

MSc Eng in Applied Chemistry

Supervisor

Marie Lund Traulsen

Co-supervisors

Kent Kammer Hansen

ECTS credits

15 - 30

Type

BSc project, MSc thesis

MSc in Physics and Nanotechnology

Supervisor

Marie Lund Traulsen

Co-supervisors

Kent Kammer Hansen

ECTS credits

15 - 30

Type

BSc project, MSc thesis

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.


Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

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Denmark



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CVR-nr. 30 06 09 46

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