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Ecosystem processes are identical to chemical processes. One of the examples is the simultaneous combustion of CO and oxidation of SO2. This process is in
Ecosystem processes are identical to chemical processes. One of the examples is the simultaneous combustion of CO and oxidation of SO2. This process is in which CO at 298K and 1atm is fed to Reactor-1 and burned with 80% of theoretical air in Reactor-1 where product combustion gasses are (CO,CO2,N2) and there is no O2. This stream is sent to heat exchanger-1 to generate steam. H2O(I) at 298K enters heat exchanger- 1 and saturated steam at 450psig is obtained. The exit temperature of the combustion gases from the heat exchanger is 700K. The combustion gases then enter Reactor-2 at a temperature of 811K to give heat to the SO2 oxidation reaction. The stream entering Reactor- 2 contains SO2 at 2200kmol/h and 298K. The inlet stream contains 66.7%SO2 and 33.3%O2. The exit temperature of the combustion gases from Reactor- 2 is 1000K and the outlet stream contains 58.6%SO3,27.6% SO2, and 13.8%O2. Combustion gases used to heat Reactor-2 are then sent to the heat exchanger- 2 but before that, some portion of combustion gases at the outlet of Reactor 2 is recycled to the inlet of Reactor- 2 and mixed into the outlet stream of the heat exchanger 1 . The other part of the separation point is sent to the exchanger-2 to heat the air that reacts with CO in Reactor 1 . The outlet of the combustion gases from heat exchanger-2 is at 400K and fresh air is fed to the heat exchanger 2 at 298K. Reactions: CO+21O2CO2SO2+21O2SO2(COburning)(SO2oxidation) Note: There is no heat loss to the surrounding. The gases involved in the SO2 oxidation do not come in direct contact with the combustion gas used to heat the SO2 reactants and products. a) Draw and label the flow sheet b) Do the degree of freedom analysis c) Write the equation and solving strategy (for unknown variables) d) Calculate the flow rate of CO burned per hour in Reactor-1
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