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# ch11 - CHAPTER 11 SOLUTIONS 11.1 Rich and Lean Stream...

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11-1 CHAPTER 11 SOLUTIONS 11.1 Rich and Lean Stream Summary F (kg/s) y s or x s y t or x t n (kg/s) R1 (off-gas) 0.2 0.002 0.0001 0.00038 L1 (additives) 0.08 0.003 0.006 0.00024 L2 (catalytic solution) 0.05 0.002 0.004 0.0001 L3 (organic oil) Unlimited 0.008 0.010 Unlimited Determine the minimum amount of organic oil required using the CI method. Rank order source and target mass fractions For each source and target mass fraction (boldface), determine closest mass fractions in other process phases [ y = 0.25( x L1 + 0.0001), y = 0.5( x L2 + 0.0001)]. y x L1 x L2 R1 0.0020 0.0079 * 0.0039 0.0001 0.0003 0.0001 L1 0.000775 0.003 0.00145 * 0.001525 0.006 0.00295 L2 0.00105 0.0041 0.002 0.00205 0.0081 * 0.004 * infeasible mass fraction (out of range)

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11-2 Rank order mass fractions in rich phase y 0 = 0.00205 [ x L1,0 = 0.0081 * , x L2,0 = 0.004] y 1 = 0.0020 [ x L1,1 = 0.0079 * , x L2,1 = 0.0039] y 2 = 0.001525 [ x L1,2 = 0.006, x L2,2 = 0.00295] y 3 = 0.00105 [ x L1,3 = 0.0041, x L2,3 = 0.002] y 4 = 0.000775 [ x L1,4 = 0.003, x L2,4 = 0.00145 * ] y 5 = 0.0001 [ x L1,5 = 0.0003, x L2,5 = 0.0001 * ] * infeasible mass fraction (out of range) Carry out mass balances in intervals Interval From Rich Streams (kg/s) To Lean Streams (kg/s) Excess (kg/s) R (kg/s) 1 - 0.05(0.004 - 0.0039) -5 × 10 -6 -5 × 10 -6 2 0.2(0.002 - 0.001525) 0.05(0.0039 - 0.00295) 4.75 × 10 -5 4.25 × 10 -5 3 0.2(0.001525 - 0.00105) 0.08(0.006 - 0.0041) 0.05(0.00295 - 0.002) -1.045 × 10 -4 -6.2 × 10 -5 4 0.2(0.00105 - 0.000775) 0.08(0.0041 - 0.003) -3.3 × 10 -5 -9.5 × 10 -5 5 0.2(0.000775 - 0.0001) - 1.35 × 10 -4 4.0 ×
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ch11 - CHAPTER 11 SOLUTIONS 11.1 Rich and Lean Stream...

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