4 replies to this topic

[pm11dt]

Does any one know how to help me with this issue, I have the following consecutive unimolecular first order reaction for a constant volume batch reactor: 

A --->B---->C 

And I know that the rate constant for each reaction step k₁ and k₂. 

I need to find t_max which is the time needed to reach maximum concentration of B.

Usually I would use:

t_max= 1/k_{log mean}= [ln (k₂/k₁)] /[ k₂ - k₁]  

 

How ever in this situation k₁=k₂ making the above equation unsuitable. 

 

[breizh]

pm11dt,

Consider reading the document attached , probably your textbook should support your query .

This forum is  not supposed to do your homework .

 

Breizh

Edited by breizh, 05 April 2014 - 08:05 PM.

[pm11dt]

Thank you for the reply and the lecture slides but I'm not sure it has answered my question, I have already consulted my course lecture notes and well as reading through Chemical Reaction Engineering, 3rd Ed. by Octave Levenspiel (Pg 41- 55) . Perry's Chemical engineering Handbook as well as other online resources available to me. 

I thought this forum was a place to seek advice from experienced professional chemical engineers and associated professionals, I'm sorry if I have offended you! 

If anyone else wishes to help me I will be grateful!

[breizh]

pm11dt ,

No offense .

Your result are similar to the  document provided ( slide 13) !

 

Breizh

Edited by breizh, 07 April 2014 - 06:24 PM.

[Christa]

...