2 replies to this topic

[Paula Lapizar]

Hi Everyone...
Could anyone help me out?



How do I get about this problem?

At 600K the gas phase reaction

C2H4+ Br2 <---> C2H4Br2 k1---> 500 liter/mol-hr
<---K2 0.032/hr

where K2 and K2 are rate constants.

The Plug flow reactor is to be fed 600 m3/hr of gas containing 60% Br2, 30% C2H4 and 10% Inerts by volume at 600K and 1. atm. Compute

A. the maximum possible fractional conversion of C2H4 into C2H4Br2
B. The volume of reaction vessel required to obtain 60% of this maximum conversion..



I would really APPRECIATE all the help I could get... thanks!

[Andree]

1. recalculate volume fractions to concentration (mol/liter)
2. calculate concentration of C2H4Br2 at equilibrium state from equation for 2nd order kinetic and taking dc(C2H4)/dt = 0;
3. from stoichiometry c(C2H4) = c(C2H4Br2); hence, c(C2H4)_left = c(C2H4)_initial - c(C2H4Br2)_equilibrium
4. conversion_max = (c(C2H4)_initial - c(C2H4)_left) / c(C2H4)_initial

5. from forumla in point 4. calculate c(c2H4)_left for 0.6*conversion_max on the l.h.s.
6. from reaction kinetic (integrated equation) calculate time of reaction necessary to obtain value calculated in point 5.
7. volume of reactor for plug flow reactor = flow * time calculated in 6.

[Paula Lapizar]

1. recalculate volume fractions to concentration (mol/liter)
2. calculate concentration of C2H4Br2 at equilibrium state from equation for 2nd order kinetic and taking dc(C2H4)/dt = 0;
3. from stoichiometry c(C2H4) = c(C2H4Br2); hence, c(C2H4)_left = c(C2H4)_initial - c(C2H4Br2)_equilibrium
4. conversion_max = (c(C2H4)_initial - c(C2H4)_left) / c(C2H4)_initial

5. from forumla in point 4. calculate c(c2H4)_left for 0.6*conversion_max on the l.h.s.
6. from reaction kinetic (integrated equation) calculate time of reaction necessary to obtain value calculated in point 5.
7. volume of reactor for plug flow reactor = flow * time calculated in 6.

thank you so much... I owe you one...