Analysis of 2007 Emissions from Power Plants and Other ... - MARAMA
Analysis of 2007 Emissions from Power Plants and Other ... - MARAMA
Analysis of 2007 Emissions from Power Plants and Other ... - MARAMA
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<strong>Analysis</strong> <strong>of</strong> <strong>Emissions</strong> <strong>from</strong> <strong>Power</strong> <strong>Plants</strong> <strong>and</strong> <strong>Other</strong> Large Combustion Sources March 2011Page 418 Geographic Variation in Fuel Types <strong>and</strong> Combustion TechnologyDo the patterns in Question 7 vary by State?The previous section showed MANE-VU+VA variations in NOx emissions by fuel type<strong>and</strong> combustion type. This sections provides that same analysis but subdivides theMANE-VU+VA region into three parts – USEPA Region 1 States (CT, MA, ME, NH, RI,VT), Region 2 States (NJ, NY), <strong>and</strong> Region 3 States (DC, DE, MD, PA, all <strong>of</strong> VA, butexcludes WV).Figure 8-1 shows the NOx daily emissions by fuel type, sorted <strong>from</strong> lowest emission dayto highest emission day for the period May 1 to September 30, <strong>2007</strong>. On a relative basis,the NOx emissions in the Region 1 <strong>and</strong> 2 States result <strong>from</strong> a mix <strong>of</strong> coal, residual oil,diesel, <strong>and</strong> natural gas. The dominant fuel in the Region 3 States is coal. On the lowestemission days in Region 1, coal is the dominant fuel type. On the highest NOx emissiondays in Region 1, NOx emissions <strong>from</strong> residual oil combustion exceed the emissions <strong>from</strong>coal combustion. Region 2 States see increases in NOx emissions <strong>from</strong> residual oil, dieseloil <strong>and</strong> natural gas during high NOx emission days. Region 3 States also see increases inNOx emissions <strong>from</strong> residual oil during high NOx emission days, but the emissions onhigh NOx emission days still are dominated by coal combustion.The above patterns are shown more clearly in Figure 8-2, which shows the NOx dailyemissions by fuel type for six high ozone days in <strong>2007</strong>. Region 1 States have relativelyhigh emissions <strong>from</strong> residual fuel units on high ozone days. All four fuel types haverelatively important contributions in Region 2 States on high ozone days. Region 3 Stateshave some contribution <strong>from</strong> residual oil on high ozone days, but coal still predominates.Figure 8-3 shows the NOx daily emissions by combustion unit type, sorted <strong>from</strong> lowestemission day to highest emission day for the period May 1 to September 30, <strong>2007</strong>. NOxemissions <strong>from</strong> combustion turbines in Region 2 States become more important on highNOx emission days.Figure 8-4 shows the NOx daily emissions by combustion unit type for six high ozone daysin <strong>2007</strong>. Again, NOx emissions <strong>from</strong> combustion turbines in Region 2 States becomemore important on high ozone days.