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 SO removal efficiency of 88%, how many lbs/ of SO are released? (c) Given that the SO emissions are limited to 0.6 lbs SO 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 m/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 15C? (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?