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Elements of Chemical Reaction ering 4th Ed - H. Scott Fogler 74

# Elements of Chemical Reaction ering 4th Ed - H. Scott Fogler 74

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42 Conversion and Reactor Sizing Chap. 2 The entering molar flow rate is where C, = entering concentration, mol /dm3 y, = entering mole fraction of A P, = entering total pressure, e.g., kPa PA, = .v,,Po = entering partial pressure of A, e.g., kPa To = entering temperature, K R = ideal gas constant kPa ' see Appendix B mol * K 1 The size of the reactor will depend on the flow rate, reaction kinetics, reactor conditions, and desired conversion. Let's first calculate the entering molar flow rate. Exumpk 2-1 U~ittg the Ideal Gas Law to Caicuhfe CAl and FA* A gas of pure A at 830 kPa (8.2 atm) enters a reactor
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Unformatted text preview: with a volumetric flow rate, v* of 2 dm% at 500 K. Calculate the enterlng concentration of A, C,,, and the entertng molar Bow rate. rho. Solurioil U'e again recall that for an ideal pas: where Po = 8.70 k% (8.3 atm) Y M ) = 1 . 0 ( P u ~ A ) To = in~tral temperature = 500K R = 8.3 14 dm3 4 1;Palniol , K (Appendix B) Substituting the given paraineter values inlo Equation (E2-1. I ) yields We could also solve for the partial pressure in terms of the concentration: .- (1)(830 kPa) mol I c.40 = = 0.20- (8.334 dm? kPdrnol . KJ(500K) dm3...
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