CONTROLLING POWER PLANT CO2EMISSIONS:A LONG RANGE VIEWJohn Marion ([email protected]; 860-285-4539)Nsakala ya Nsakala ([email protected]; 860-285-2018)ALSTOM Power Plant Laboratories2000 Day Hill RoadWindsor, CT 06095, USATimothy Griffin ([email protected]; +41 56/486 82 43)Alain Bill ([email protected]; +41 56/486 81 07)ALSTOM Power Technology Center5405 Baden-Daettwil, SwitzerlandABSTRACTALSTOM Power (ALSTOM) is an international supplier of power generation with concernfor the environment. We areaware of the present scientific concerns regarding greenhousegas emissions and the role of fossil fuel use for power generation. Although the scientificand policy dialogue on global climate change is far from conclusive, ALSTOM continues toinvest in R&D to develop:-high efficiency power generation equipment with the most modern technologies to utilizefossil fuels with the lowest possible emissions (short, medium and long term) term), and-technologies to remove and sequester carbon dioxide created in power plants in anenvironmentally and economically favorable manner (long term).This paper is an overview of activities to study and develop controls for carbon dioxide (CO2)emissions from power generation. First, energy efficiency improvements for both new andexisting fossil fuel power plants are briefly reviewed for both coal and natural gas fuels.Greater depth is then given to options for CO2capture and sequestration. These studies arelooking at current and novel power generation technologies.CARBON DIOXIDE EMISSIONS FROM FOSSIL FUELSWhen greenhouse gas emissions are under discussion, CO2is generally the gas whichreceives the most attention for its greenhouse effect. Although the radiative forcing of CO2 ismuch less than other greenhouse gases (CH4, N2O, CFCs, etc.), CO2is emitted in largeamounts into the atmosphere and has a rather long atmospheric lifetime. When all theseparameters are modelled, with our current state of knowledge, to evaluate the global warmingpotential, CO2is estimated to contribute approximately 60% of the enhanced greenhouse gaseffect .
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