Simonsen, Anders Schou

PROJECT TITLE: Wet Scrubbers for Reducing SOx Emissions from Marine Engines       

Industrial PhD Alfa Laval Aalborg A/S 

PhD period: 2015.10.01 - 2018.09.30.
Section: Fluid Mechanics and Combustion
Supervisor: Kim Sørensen
Co-Supervisors: Lasse Rosendahl and Jens Peter Hansen
Contact information

Collaborator:  Alfa Laval, Aalborg.
Funding: Innovation Fund Denmark and Alfa Laval.


Marine engines are typically fuelled by Heavy Fuel Oil, HFO, which is a crude distillate containing large amounts of harmful compounds. Sulphur in the HFO will through combustion react and form sulphur oxides, SOx, which contribute to air pollution. As such, limits have been enforced in the content of sulphur in marine fuels, which have become stricter with time. In order to comply with these regulations, ship owners have been forced to either switch to expensive low sulphur fuel or to install a scrubber to remove the sulphur from the exhaust gas.

Different scrubber types exist, where this project will be dealing with sprayer based scrubbers. A large amount of water will be poured in the counter flow direction of the exhaust gas, which will remove the sulphur along with the majority of the particles. The governing chemical reactions and equilibria taking place between the water and gas phase can be modelled using Computational Fluid Dynamics, CFD, which this project will investigate.

The objective of the project is to accurately capture the phenomena taking place inside the scrubber. A model capable of this will be used to perform parametric studies and optimizations, which should lead to general optimal design rules for sprayer based scrubbers.

The project will be carried out in corporation with Alfa Laval, Aalborg, where test facilities are available. This will be used to validate the developed models and to evaluate the performance of the suggested design changes.


Publications in journals and conference papers may be found at VBN.