Solution of Hw7

# Solution of Hw7 - 0.009 1.37084E-05 i-pentane Trace...

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Solution of Hw7 Ming Gu 6-6 Z=0.39 (from Ex 3-7) Bg=0.02827=0.02827=0.00693 6-8 Z=0.951 (from Ex 3-10) Bg=0.02827=0.02827=0.004615 Vg_scf=43560=1.53e10 scf 6-15 Cg= Cg==0.00538 psi -1 For ideal gas, B=0, Cg=1/P=0.005 psi -1 Relative difference: (0.00538-0.005)/0.00538=7.056% 6-17 y = 8.81E-06x 2 - 2.04E-02x + 1.97E+01 R² = 9.98E-01 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 500 600 700 800 900 1000 1100 1200 1300 Molar Volume (cuf/lb) Pressure (psia) -0.004542 cuf/(mol-psi) Cg= For ideal gas, Cg=1/P=0.00111 psi -1 Relative difference: (0.00111-0.00054)/0.00054=105.5% 6-20 Ppc=643 psi, Tpc=413 R (from Fig 3-11) Ppr=3025/643=4.7045, Tpr=(175+460)/ 413=1.5375 According to Fig 6-4, CprTpr=0.25, Cpr=0.1626 Cg=Cpr/Ppc=2.53 e-4 psi -1 6-22 First get mole weight Mi from figure 6-7.

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Component yi Mi Mi 0.5 yi*Mi 0.5 µi (cp) µi*yi*Mi 0.5 Methane 0.9712 16 4 3.8848 0.013 0.0505024 Ethane 0.0242 30 5.477226 0.132549 0.0112 0.001484547 Propane 0.031 44 6.63325 0.205631 0.0098 0.002015181 i-Butane 0.0005 58 7.615773 0.003808 0.0091 3.46518E-05 n-Butane 0.0002 58 7.615773 0.001523
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Unformatted text preview: 0.009 1.37084E-05 i-pentane Trace n-pentane Trace Hexanes 0.0002 86 9.273618 0.001855 0.0077 1.42814E-05 Heptanes plu 0.0006 100 10 0.006 0.007 0.000042 sum 4.236165 0.05410677 6-27 From exercise 3-30, Ƴ g =0.697, P=455 psi, T=90 F, M g =0.697*29=20.213 lb/lb mole From Fig. 6-8, viscosity at atmospheric pressure is, µ g1 =0.0106 cp From figure 3-11, Ppc=664 psi, Tpc=378 R, Ppr=455/664=0.685; Tpr=(90+460)/378=1.455 From figure 6-9, µ g /µ g1 =1.1, µ g =1.1*0.0106=0.01166 cp Dynamic viscosity (Coefficient of viscosity)= µ g /ρ g =0.01166 cp/(0.697*1.25e-3 g/cc)=13.38 centistokes 6-28 Component yi Lci yi*Lci zi yi*(1-zi) 0.5 Methane 0.85 1010 858.5 0.998 0.038013 Ethane 0.09 1769.6 159.264 0.9919 0.0081 Propane 0.04 2516.1 100.644 0.9825 0.005292 n-Butane 0.02 3262.3 65.246 0.9667 0.00365 sum 1183.654 0.055054 L c ideal ==1183.654 Z=1-(=1-0.055 2 =0.996969 L c = L c ideal /Z=1187.252 BTU/scf...
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## This note was uploaded on 11/25/2011 for the course MATH 325K taught by Professor Shirley during the Spring '11 term at University of Texas at Austin.

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Solution of Hw7 - 0.009 1.37084E-05 i-pentane Trace...

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