Consider a 35% efficient 600 MW power plant burning 15,000 Btu/lb coal containing 65% carbon and...

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Consider a 35% efficient 600 MW power plant burning 15,000 Btu/lb coal containing 65% carbon and 1.5% sulfur by mass (a) What is the rate of sulfur production at the power plant in lbs S/hr? (b) Suppose you install a caustic scrubber with SO₂ removal efficiency of 88%, how many lbs/ of SO₂ are released? (c) Given that the SO₂ emissions are limited to 0.6 lbs SO₂ per million Btu of heat input, does the plant meet the EPA standards? If not, what would you suggest as the new efficiency f the caustic scrubber? (d) How much cooling water would be required (in m³/s) to carry away the waste heat at the power plant if only 16% of waste heat escaped with stack gases, and we allowed the wate temperature of the cooling water to increase in temperature by 15°C? (e) Compare the carbon emissions from the coal-fired power plant with those estimated as 0.0206 g C/kJ for petroleum in Problem 2.7, and as 0.0134 g C/kJ for methane in Example 2.3. How would you rank the three fossil fuels from cleanest to dirtiest based on carbon emissions? Consider a 35% efficient 600 MW power plant burning 15,000 Btu/lb coal containing 65% carbon and 1.5% sulfur by mass (a) What is the rate of sulfur production at the power plant in lbs S/hr? (b) Suppose you install a caustic scrubber with SO₂ removal efficiency of 88%, how many lbs/ of SO₂ are released? (c) Given that the SO₂ emissions are limited to 0.6 lbs SO₂ per million Btu of heat input, does the plant meet the EPA standards? If not, what would you suggest as the new efficiency f the caustic scrubber? (d) How much cooling water would be required (in m³/s) to carry away the waste heat at the power plant if only 16% of waste heat escaped with stack gases, and we allowed the wate temperature of the cooling water to increase in temperature by 15°C? (e) Compare the carbon emissions from the coal-fired power plant with those estimated as 0.0206 g C/kJ for petroleum in Problem 2.7, and as 0.0134 g C/kJ for methane in Example 2.3. How would you rank the three fossil fuels from cleanest to dirtiest based on carbon emissions?

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