Methods to Reduce Sulfur Dioxide Emissions From CoalFueled

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Methods to Reduce Sulfur Dioxide Emissions From Coal-Fueled Utilities Cynthia Schmidt Mechanical Engineering Department

Methods to Reduce Sulfur Dioxide Emissions From Coal-Fueled Utilities Cynthia Schmidt Mechanical Engineering Department University of Texas

Three classes of methods exist for reducing emissions of sulfur dioxide pre-combustion methods post-combustion

Three classes of methods exist for reducing emissions of sulfur dioxide pre-combustion methods post-combustion methods

Coal switching and coal cleaning are two precombustion methods Coal Switching High Sulfur Mine

Coal switching and coal cleaning are two precombustion methods Coal Switching High Sulfur Mine Low Sulfur Mine Coal Cleaning

Utilities can reduce SO 2 emissions by switching to low sulfur coal High Sulfur

Utilities can reduce SO 2 emissions by switching to low sulfur coal High Sulfur Mine Low Sulfur Mine • 70% removal of SO 2 • no capital costs • increased coal costs • increased transportation costs

Coal cleaning removes sulfur from the coal after it is mined Coal Cleaning •

Coal cleaning removes sulfur from the coal after it is mined Coal Cleaning • 20– 70% removal of SO 2 • no capital costs • increased coal cost • decreased transportation costs • decreased operating costs

The most effective combustion method is an atmospheric fluidized bed cleaned exhaust • 90%

The most effective combustion method is an atmospheric fluidized bed cleaned exhaust • 90% removal capability separator • low capital cost—able to use in existing equipment • high operating cost • ability to use different grades of coal grid air inlet

Absorption and adsorption are two post-combustion processes Adsorption Absorption gas outlet mist eliminator spray

Absorption and adsorption are two post-combustion processes Adsorption Absorption gas outlet mist eliminator spray water inlet for combustion gases drain stationary sorbent bed inlet for combustion gases gas outlet

Absorption removes SO 2 by washing the exhaust gas after combustion Absorption gas outlet

Absorption removes SO 2 by washing the exhaust gas after combustion Absorption gas outlet mist eliminator • 90– 95% removal of SO 2 • high capital costs • increased operating costs spray water • large amounts of water needed • disposal problem for sludge inlet for combustion gases drain

Adsorption removes sulfur dioxide with a stationary sorbent bed Adsorption stationary sorbent bed inlet

Adsorption removes sulfur dioxide with a stationary sorbent bed Adsorption stationary sorbent bed inlet for combustion gases gas outlet • 80% removal of SO 2 • high capital costs • no need for water • increased operating costs

By using these methods, coal utilities can greatly reduce SO 2 emissions coal cleaning

By using these methods, coal utilities can greatly reduce SO 2 emissions coal cleaning 40% coal switching 80% fluidized bed 90% 95% absorption 80% adsorption 25 50 75 Percentage Reduction of SO 2

Biogeochemical Cycles Sulfur What is Sulfur n SulfurBiogeochemical Cycles Sulfur What is Sulfur n Sulfur
Formula Equations 1 Sulfur Oxygen Sulfur dioxide SFormula Equations 1 Sulfur Oxygen Sulfur dioxide S
Estimation of nitrogen dioxide NO 2 sulfur dioxideEstimation of nitrogen dioxide NO 2 sulfur dioxide
Environmental Federalism and Sulfur Dioxide Emissions from ElectricityEnvironmental Federalism and Sulfur Dioxide Emissions from Electricity
Laboratory Methods Workshop Total Sulfur Dioxide Dr EricLaboratory Methods Workshop Total Sulfur Dioxide Dr Eric
Emissions Carbon dioxide emissions based on macroeconomic growthEmissions Carbon dioxide emissions based on macroeconomic growth
Sulfur Cycle Facts Sulfur Oxidation States Sulfide andSulfur Cycle Facts Sulfur Oxidation States Sulfide and
Organo Sulfur Compounds Sulfur S S and OOrgano Sulfur Compounds Sulfur S S and O
Sulfur Cycle The sulfur cycle is relatively complexSulfur Cycle The sulfur cycle is relatively complex