2 replies to this topic

[liquidcarbonic]

Respected.

We have generator for power generation (2MW) and enough flue gases to capture CO2 from that.

At the moment we are having flue gases @ 180-190C with O2 contents 11-12% & CO2 4-5%

 

We have calculated max 1230kg/hr CO2 can be generated from this exhaust.

 

Currently stucked in steam calculation for Reboiler, as how much steam be required for 500kg/hr - CO2 MEA reboiler.

 

Can please anyone help out.

[shvet1]

You should consider modelling such things. This may help

Edited by shvet1, 25 September 2023 - 11:33 PM.

[Art Montemayor]

Liquid:

 

This response to your query may be late from me but I see some trouble for you in trying to recover the flue gas CO2 content from your power boiler and I think its important to pass my experience of many years to you in order to avert any bad financial investment and time possibly put into your proposal.

 

First and foremost: Although you don’t mention any thing about your proposed process in recovering the CO2, I think I can safely guess that you intend to use Monoethanolamine (MEA) – hopefully at a solution concentration of no more than 15%.

Secondly, you will never have any success in trying to recover the CO2 with any amine.  Your flue gas is contaminated due to too much excess Oxygen.  12% Oxygen will literally burn up your amine, converting it into very corrosive compounds.  You’ll be out of business in less than a year.

Additionally, your CO2 content is too low!  Perhaps you are mistaking your Orsat analysis on the flue gas, but if you are burning bunker C or even #2 Fuel Oil, you should be getting approx. 14% CO2 in your stack gas.

 

I don’t know what you are burning as fuel and why you are using so much excess combustion air in your boiler (perhaps you are burning bagasse or wood chips) but I can definitely tell you can’t succeed with the data you furnish.

 

Sorry.  But better you know this up front before investing time and money.  Doing any modeling work in my opinion is a waste of time.  The basic fact is that the input and expected recovery won't work.