Archive for October 2007
My list of publications has just been updated and 2 new publications have been added
A new publication co-authored with my collegue Stefan Mayer at MAN Diesel A/S is out. The title is: “Use of Seawater Scrubbing for SO2 Removal from Marine Engine Exhaust Gas” and the paper is published in Energy & Fuels. As soon as possible a link to a full-paper download will be given.
The mechanism of SO2 absorption in seawater is treated. Emphasis is on applications of scrubbing of marine engine exhaust gas containing SO2. The formulated model is used to predict the influence of various parameters on SO2 absorption efficiency, e.g., seawater temperature, partial pressure of SO2, seawater salinity, and seawater alkalinity. It is found that the absorption capacity of standard seawater is approximately twice that of brackish water with close to zero salinity. The absorption capacity decreases with both decreasing salinity and alkalinity. Different scenarios in which the required water supply rate for a given SO2 cleaning efficiency is calculated. It is found that a 66% cleaning efficiency, corresponding to meeting the limits of SOx emission control areas (SECA) when operating on a fuel containing 4.5% w/w sulfur, requires a minimun water supply rate of 40–63 kg/(kW h) depending on the seawater composition in terms of salinity and alkalinity. Such data are essential in judging the operating cost of seawater scrubbing compared to alternative methods.