Question

The reversible gas-phase dehydrogenation of ethylbenzene is achieved in an isothermal CSTR with no pressure drop. The feed enters at a volumetric flow rate of v₀ = 2000 L/hour. On a molar basis the feed consists of half ethyl benzene (A) and half inerts (I) and is well mixed before it enters the reactor. The total pressure in the reactor is 6 bar (P_A0 = 3 bar, P_I0 = 3 bar). The molar flow rate of A is F_A0 = 200 mol/hr. At the reaction temperature of 620°C, the forward rate constant, k_A, is 5.8 mol/(L·hr·bar). The equilibrium constant, at this temperature, K_P, is 8.4 bar.

Ethylbenzene <--->Styrene +H2

a) Write the appropriate reactor design equation, reaction rate expression, and stoichiometry.

B) Write the rate of reaction, -r_A, solely as a function of P_A0, X, K_P, and k_A.

C) Calculate the equilibrium conversion at these conditions, X_e,

D) Calculate the reactor volume necessary to achieve 90% of the equilibrium conversion.

E) How would the conversion be affected if the reactor diameter increased and height decreased but total volume remained the same? Explain.

Answer 1

solution-

Date : Page: Ter叩こ623"e-293に hv FA200 osT hy Benzene (T D(e 2-2 at ex.)

Date Pago AtEXA) rp Rale as o tuma 2 T PT

Date :-1 Page: ecome 2 タ 297 323 0-X1 201 223 X 207 836 e get one γ@j ơn d

Date : / Page: AsY 2 「(1-09 2 32 V Vs 00一二.4334 22L ar the tonversion depend on condop

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