Question

4. [30 marks] 100 mol/min of CO at 300 °C are burned with 100 % excess Oz which is at 100 °C. The exit gases leave at 400 °C. a) [10 pts) Calculate the molar flowrate of individual components in the feed and exit streams, assuming that there is no unburned CO in the exit stream. Follow the systematic procedure to solve this question. b) [10 pts) Calculate the standard heat of reaction using the standard heats of formation of reactants and products. AH, (25C, latm) =? c) [10 pts) Taking the heat of reaction approach in solving energy balances problems, and using Table 3.8 for obtaining the enthalpy values, determine how much heat is transferred to or from the system in kW? CO(g) +20,00) +0,6) Table B.8 Specific Enthalpies of Selected Gases: SI Units H(kJ/mol) Reference state: Gas, Pret - 1 atm, Tief 25°C T Air 02 N Hz CO CO2 HO 0 25 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 -0.72 0.00 2.19 5.15 8.17 11.24 14.37 17.55 20.80 24.10 27.46 30.86 34.31 37.81 41.34 44.89 48.45 --0.73 0.00 2.24 5.31 8.47 11.72 15.03 18.41 21.86 25.35 28.89 32.47 36.07 39.70 43.38 47.07 50.77 -0.73 0.00 2.19 5.13 8.12 11.15 14.24 17.39 20.59 23.86 27.19 30.56 33.99 37.46 40.97 44.51 48.06 -0.72 0.00 2.16 5.06 7.96 10.89 13.83 16.81 19.81 22.85 25.93 29.04 32.19 35.39 38.62 41.90 45.22 -0.73 0.00 2.19 5.16 8.17 11.25 14.38 17.57 20.82 24.13 27.49 30.91 34.37 37.87 41.40 44.95 48,51 0.92 0.00 2.90 7.08 11.58 16.35 21.34 26.53 31.88 37.36 42.94 48.60 54.33 60.14 65.98 71.89 77.84 -0.84 0.00 2.54 6.01 9.57 13.23 17.01 20.91 24.92 29.05 33.32 37.69 42.18 46.78 51.47 56.25 61.09 Other required properties of the components can be found in the attached tables.

Answer 1

Given fo= 100 mol/min. 022 100 mol/min. (100% excess) cot 202 co2. since rou 1 mol 00. Creaction. 0.5 mol O2. suquiol. Henee cufter complete Ansner cos 100 mol/min co2= 100 mol/min. Coth con 02 - Top mollmil 02 = 50 mol/min. Anus were Hence siiven that input feed is at 100c and output stream is at 4000 Specific heat at.100'c fuom üven table 2.19 Kylmol Hcogooch hoz (105) - 2.24 kilmol. I specific Heat of exit streams at 400c. Concrooch 16-35 kamol H 02 (40001 - 11.72 kJ1 mol. Z reactant A4r Now all from above ren Aur Rat Prod. 2 puoduet (02140 01 + az (rade ; } - {fl oz cróci + H colloc [100X 16-35 + 50*11.72] - [700X2-24 + 100 x2-14] [1635 + 586] - [ 224 +2197 1778. Kulmin = 29.63 Kils OH ΔΗ 29.63 KW Ang & Hence total 29.63 kw heat transferred to system.

6) since since standand temp is 25e is ruflerne temp Hence, the 125 1afm) = Alf Product - A Hf warfart A4 (25, 1arm = Amso