Title: Trade-off in Emissions of Acid Gas Pollutants and of Carbon Dioxide in Fossil Fuel Power Plants with Carbon Capture
Citation: ENERGY POLICY vol. 35 p. 3991-3998
Publication Year: 2007
JRC N°: JRC34003
ISSN: 0301-4215
URI: http://dx.doi.org/10.1016/j.enpol.2007.01.027
DOI: 10.1016/j.enpol.2007.01.027
Type: Articles in periodicals and books
Abstract: This paper investigates the impact of capture of carbon dioxide (CO2) from fossil fuel fired power plants on the emissions of nitrogen oxides (NOX) and sulphur oxides (SOX), which are acid gas pollutants. This was done by estimating the emissions of these three chemical species from natural gas combined cycle plants and pulverised coal plants, equipped with post-combustion carbon capture technology for the removal of CO2 from their flue gases, and comparing them to the emissions of similar plants without CO2 capture. The capture of CO2 is not likely to increase the emissions of acid gas pollutants from individual power plants; on the contrary some NOX and SOX will also be removed during the process of capturing CO2. The large-scale implementation of carbon capture is however likely to increase the emission levels of NOX from the power sector, due to the reduced efficiency of power plants equipped with carbon capture technologies and the need to maintain electricity generation. On the other hand SOX emissions from coal plants may be decreased significantly due to the need to reduce its concentration to very low levels to avoid significant losses of the chemicals that are used to capture CO2. The increase in the quantity of NOXemissions will be however low, estimated at 5% for gas plants and 19% for coal plants or less, while the emissions of SOX from coal pfired plants will be reduced by as much as 92% when at least 80% of the CO2 generated will be captured.
JRC Directorate:Energy, Transport and Climate

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