8- 78.22 (cont’d) c.From part (b), 8.07 kg steam is produced per 100 mol feed ±..nfeed==×−1250011430 103kg steamhkmol feed8.07 kg steamh3600 skmol / s ±...Vproduct gas353mol feedsmol product gas100 mol feed8.314 Pa mmol K723 K1.01325 10 Pam/s=⋅⋅×=4301336 9341d. Steam produced from the waste heat boiler is used for heating, power generation, or process application.Without the waste heat boiler, the steam required will have to be produced with additional cost to the plant. 8.23 Assume ΔΔΔΔHHHHmixC H OC H≅⇒=+01012266Kopp’s rule: CpCHOdiejej1012210 1212 182 253862 35=++=⋅=⋅() () ().JmolCJgCooΔΔΔHHHCH101226620 0102112 3571 25220715087910 06255 234 1011662207 116633735298348=⋅−==⋅+×LNMOQP==+=−z..().[..LgLkJ10 JJgCCkJLgLmol78.11 gT] dTkJkJ3oob. References: H2O (l, 0.01 oC), C3H8(gas, 40 oC) C H kJ / mol kJ mol (from Table B.2)38inoupC3H8:²;².CdTCtp=z936402402inoutˆˆH O: 3065 kJ/kg (Table B.7); 640.1 kJ/kg (Table B.6)c. C19.36 kJ/mol, (640.1 3065) kJ/kg2425 kJ/kgHw
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This note was uploaded on 01/07/2012 for the course CH E 210 at Penn State.