Answer Happy

5. (15) Your company has developed a novel direct process to form urea (NH2)2CO by the reaction: 2 NH3 + CO2 → (NH2)2CO + H2O. The reaction is to be carried out in a fixed bed reactor Reactor with recycle of unreacted species. The overall feed Sep. composition (stream 1) is 59 mol% NH3, 34 mol% CO2, and 7 mol% N2 (inert). The single pass NH3 conversion is 61% and the purge ratio (~,/na) is 25%. The membrane separator allows all the urea to exit in stream 5 and none of the other components. For a feed rate of 100 kmol/hr (stream 1), find the molar flow rate of NH3 in stream 2, the molar flow rate of NH3 in stream 7, and the overall conversion based on NH3.
100 150 250 300 350 2689 2517 2784 2589 200 2880 2662 2978 2736 3077 2812 3177 2890 2688 2516 17.2 2783 2588 19.5 3177 2890 28.7 2683 2512 3.41 2676 2507 1.69 3177 2889 5.75 2880 2661 21.8 2878 2660 4.35 2875 2658 2.17 2855 2643 0.425 2977 2736 24.2 2979 2735 4.83 2975 2734 2.40 3077 2812 26.5 3076 2811 5.29 3074 2811 2.64 3065 2803 0.522 3052 2794 0.258 3176 2889 2.87 5.0 2961 2724 0.474 2943 2710 0.233 3168 2883 0.571 3159 2876 0.282 2827 2621 0.206 852.6 850.2 3025 2774 0.125 3139 2862 0.139 0.00116 2902 2679 0.111 1085.8 1080.8 0.00125 2962 2727 0.0588 3095 2829 0.0665 Table B.7 Properties of Superheated Steam P(bar) Sat'd Sat'd Temperature (°C) ► (Tsat.°C) Water Steam 50 75 0.0 й 2595 2642 (-) Û Ú 2446 2481 V 0.1 À 191.8 2584.8 2593 2640 (45.8) Ú 191.8 2438.0 2444 2480 V 0.00101 14.7 14.8 16.0 0.5 A 340.6 2646.0 209.3 313.9 (81.3) Û 340.6 2484.0 209.2 313.9 Û 0.00103 3.24 0.00101 0.00103 1.0 À 417.5 2675.4 209.3 314.0 (99.6) 0 417.5 2506.1 209.2 313.9 V 0.00104 1.69 0.00101 0.00103 й 640.1 2747.5 209.7 314.3 (151.8) 0 639.6 2560.2 209.2 313.8 V 0.00109 0.375 0.00101 0.00103 10 A A 762.6 2776.2 210.1 314.7 (179.9) 0 761.5 2582 209.1 313.7 D 0.00113 0.194 0.00101 0.00103 20 A R 908.6 2797.2 211.0 315.5 (212.4) Û 906.2 2598.2 209.0 313.5 D 0.00118 0.09950 0.00101 0.00102 40 À 1087.4 2800.3 212.7 317.1 (250.3) Ú 1082.4 2601.3 208.6 313.0 V 0.00125 0.04975 0.00101 0.00102 60 À 1213.7 2785.0 214.4 318.7 (275.6) 0 1205.8 2590.4 208.3 312.6 V 0.00132 0.0325 0.00101 0.00103 80 À 1317.1 2759.9 216.1 320.3 (295.0) 0 1306.0 2571.7 208.1 312.3 V 0.00139 0.0235 0.00101 0.00102 100 À 1408.0 2727.7 217.8 322.9 (311.0) Û 1393.5 2547.3 207.8 311.7 V 0.00145 0.0181 0.00101 0.00102 À 1611.0 2615.0 222.1 326.0 (342.1) Û 1586.1 2459.9 207.0 310.7 V 0.00166 0.0103 0.00101 0.00102 200 À 1826.5 2418.4 226.4 330.0 (365.7) ) Û 1785.7 2300.8 206.3 309.7 V 0.00204 0.005875 0.00100 0.00102 221.2(P) H 2108 2108 228.2 331.7 (374.15)(T) 0 2037.8 2037.8 206.0 309.2 0 0.00317 0.00317 0.00100 0.00102 250 230.7 334.0 (-) 205.7 0.00100 0.00101 300 235.0 338.1 (-) 205.0 307.7 0.0009990 0.00101 500 251.9 354.2 (-) 0 202.4 304.0 0.0009911 0.00100 1000 293.9 394.3 (-) 196.5 295.7 V 0.0009737 0.0009852 419.4 418.8 0.00104 419.7 418.7 0.00104 420.5 418.4 0.00104 422.0 417.8 0.00104 423.5 417.3 0.00104 425.0 416.7 0.00104 426.5 416.1 0.00104 430.3 414.7 0.00104 434.0 413.2 0.00103 435.7 412.8 0.00103 437.8 412.1 0.00103 2780 2586 3.89 2776 2583 1.94 632.2 631.6 0.00109 632.5 631.4 0.00109 633.1 603.9 0.00109 634.3 630.0 0.00109 635.6 629.1 0.00109 636.8 628.2 0.00109 638.1 627.3 0.00109 641.3 625.0 0.00108 644.5 622.9 0.00108 645.8 622.0 0.00108 647.7 620.8 0.00108 650.9 618.7 0.00107 664.1 611.0 0.00106 698.0 594.4 0.00104 2885 2668 0.0361 2787 2593 0.0243 1.343.4 1329.4 0.00140 3046 2792 0.0422 2990 2750 0.0299 2926 2702 0.0224 2695 2523 150 0.0115 853.4 848.8 0.00115 854.2 847.3 0.00115 855.1 845.9 0.00115 855.9 844.4 0.00115 858.1 841.0 0.00114 860.4 837.7 0.00114 861.4 836.3 0.00114 862.8 834.4 0.00113 865.2 831.3 0.00113 875.4 819.7 0.00111 903.5 795.3 0.00108 1085.8 1078.3 0.00125 1085.8 1075.8 0.00124 1085.8 1073.4 0.00124 1086.2 1067.7 0.00123 1086.7 1062.2 0.00122 1087.0 1060.0 0.00122 1087.5 1057.0 0.00122 1088.4 1052.1 0.00121 1093.6 1034.3 0.00119 1113.0 999.0 0.00114 1647.1 1613.7 0.00167 1635.5 1600.3 0.00163 I 308.7 1625.0 1585.0 0.00160 1609.9 1563.3 0.00155 1338.2 1317.6 0.00138 1334.3 1307.1 0.00136 1332.8 1302.9 0.00135 1331.1 1297.5 0.00135 1328.7 1288.7 0.00133 1323.7 1259.3 0.00129 1328.7 1207.1 0.00122 I HDvHUp HDP HDP ||||||||||||| 441.6 410.8 0.00103 456.8 405.8 0.00102 495.1 395.1 0.001000 1576.3 1504.1 0.00144 1550.5 1419.0 0.00131
120 145 125 35 130 40 135 45 140 50 550.033 90 95 100 105 110 115 90% 85 70% 60% 50% Relative Humidity 19 Enthalpy At Saturation, kJ/kg Dry Air 40 45 50 55 60 65 70 75 80 40% 20 30% 0.032 0.031 0.030 E0.029 -0.028 0.027 € 0.026 €0.025 6 € 0.024 0.023 0.022 €0.021 0.020 F0.019 E 0.018 0.017 €0.016 0.95 €0.015 € 0.014 €0.013 E 0.012 € 0.011 0.010 0.009 0.008 0.007 € 0.006 € 0.005 E0.004 €0.003 F0.002 0.001 F0.00 -10 -5 o 5 10 15 25 30 35 40 45 50 55 0.75 0.80 Dry Bulb Temperature, °C 0.85 0.90 Below 0°C Properties and Enthalpy Deviation Lines Are For Ice Humid Volume, m3/kg Dry Air Figure 8.4-1 Psychrometric chart—SI units. Reference states: H2O (L, 0°C, 1 atm), dry air (0°C, 1 atm). (Reprinted with permission of Carrier Corporation.) 35 40 30 35 15 0.2 10- -0.05 20% 25 10 15 20 25 5 10 10% Moisture Content, kg/kg Dry Air Wet Bulb or Saturation Temperature, C 40 10 +0.2 5 +0.4 +0.6 +0.8 +1.0 20