2 replies to this topic

[sateeshkumar830]

Dear sir,
We are giving nitrogen bubbling to the slurry in a reactor to remove dissolved oxygen in the solvents and solids.

Is it Required to maintain nitrogen at 60-65 degree centigrade ?
Solvents - Tetrahydrofuran 160 litres And Di iso propyl ethyl amine 900 litres, and one solid.
Reactor capacity - 3.6 Kl
Reaction maintenance temperature is 60-65 degrees for 16 -18 hours. Can we maintain nitrogen bubbling in the reactor at that temperature ?? What are the advantages and disadvantages ?? As i know THF will be carried out by nitrogen. That will not impact our reaction.

My doubt is nitrogen will remove heat from reaction mass, as i have to maintain the Reaction mass for 16-18 hours. it may impact the Reaction conversion. Is this possible ?

[MrShorty]

I'm not sure I fully understand your question. It seems like it should be a basic heat/energy balance kind of question. As the cold nitrogen comes into the reactor it will heat up. How much heat it takes should be as simple as mass or moles of N2 * heat capacity or specific heat of N2. As the N2 exits the reactor, it is going to carry away any volatiles in the headspace, which will lead to further evaporation of those volatiles, which requires heat (amount of material vaporized * latent heat of vaporization). Assuming you know how much material (N2 + volatiles) is going into and out of the reactor, you should be able to relate that to heat going in and out and determine if your heating system can supply enough heat to maintain the temperature.

Edited by MrShorty, 25 October 2016 - 11:39 AM.

[JLMONTREAL]

Not fully understand the story, I am guessing the target is to remove O2 to certain low level while minimizing the heat loss/temperature drop in the reactor. Maybe, it worthwhile to consider minimize N2 amount to meet the target. Would microbubbling be an option?