Engineering

Chemical EngineeringQ&A LibraryPressure variation in PFR reactor: Use the Ergun equation derived in class, along with the PFR reactor design equation, to determine variation in pressure along the reactor position for the following reaction stoichiometry: Catalyst properties (for Ergun parameter): Air flow rate in reactor: 100 lbm/hour; T & P conditions at inlet: T = 200 C; P = 5 atm; Air properties at inlet: μ0 = 0.0673 lbm/ft-hr; ρ0 = 0.413 lbm/ft3; Catalyst: ρCAT = 100 lbm/ft3; particle diameter = 0.20 inches; void fraction Φ = 0.37; Single tube diameter (ID) = 1.25 inches; Gravitational constant: gC = 4.17 x 108 lbm-ft/(lbf-hr2) Reactor conditions: Reaction: A + B → C, -rA’ = k*PA, with k = 0.08 lb mol/(lb cat-hr); Assume that the B component is oxygen, and it is present in large excess, so not included in the rate equation; FA0 = 2 lb mol/hr; yA0 = 0.15; PA0 = 0.75 atm. Write out the Ergun-based differential equation and the reactor design differential equation, with numeric values substituted in for the equation parameters. Present a single graph showing the trend in pressure and conversion with position along the PBR.Start your trial now! First week only $4.99!*arrow_forward*

Question

**Pressure variation in PFR reactor:** Use the Ergun equation derived in class, along with the PFR reactor design equation, to determine variation in pressure along the reactor position for the following reaction stoichiometry:

**Catalyst properties (for Ergun parameter):**

Air flow rate in reactor: 100 lbm/hour;

T & P conditions at inlet: T = 200 C; P = 5 atm;

Air properties at inlet: μ_{0} = 0.0673 lbm/ft-hr; ρ_{0} = 0.413 lbm/ft^{3};

Catalyst: ρ_{CAT} = 100 lbm/ft^{3}; particle diameter = 0.20 inches; void fraction Φ = 0.37;

Single tube diameter (ID) = 1.25 inches;

Gravitational constant: g_{C} = 4.17 x 10^{8} lbm-ft/(lbf-h^{r2})

**Reactor conditions:**

Reaction: A + B → C, -r_{A}’ = k*P_{A}, with k = 0.08 lb mol/(lb cat-hr);

Assume that the B component is oxygen, and it is present in large excess, so not included in the rate equation;

F_{A0} = 2 lb mol/hr; y_{A0} = 0.15; P_{A0} = 0.75 atm.

Write out the Ergun-based differential equation and the reactor design differential equation, with numeric values substituted in for the equation parameters.

**Present a single graph showing the trend in pressure and conversion with position along the PBR.**

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