3 replies to this topic

[cruam]

Dear All

I would like to know is it possible to enter a flue gas with CO content of about 100-200 ppmv into an absorber? I mean , how many CO can be allowded to enter the absorber? or is it correct to say low content of CO can be removed in the washing section of an absorber or it should be neglected?

I have found some data for allowed amount of SOx ( 10 ppmv<SO2< 100ppmv) and NOx (NO2<10 ppmv) in the flue gas to prevent foaming, fouling, corrosion, HSS formation but not for CO.

Thanks everybody guide me!

[Art Montemayor]

Cruam:

What, specifically, are you trying to do? Or are you doing this already?

It is very difficult to try to help you when we cannot understand what it is that you are doing or proposing to do. For example, you tell us you are about to introduce a flue gas (the gaseous product of a combustion - usually from a boiler, for example) that contains an amount of Carbon Monoxide (which means that the previous combustion has been inefficient. Normally, there is an excess of Oxygen in the flue gas and a complete conversion of the carbon content to the dioxide state as CO₂. Why you have inefficient combustion is not explained.

Additionally, we don't know what kind of absorption system you are operating - or proposing to operate. Nor do we know WHY you are going through the absorber. Are you trying to capture the CO₂? Or are you trying to concentrate the nitrogen content? What type or kind of absorption system are you proposing? Is it an amine solution? If so, what kind? Or is it a carbonate solution? Without the specific information, we can't make any comments that could possibly help you out. Please tell us as much technical information as you have.

[Qalander (Chem)]

Dear as mentioned by our 'Art'.

Specifically spell-out your objectives;whether relating to environmental issues or otherwise?

[cruam]

Dear Friends

Ok,thanks
you right!

I'm working on a CO2 capture system in which there is a flue gas feed from combustion in a power plant that contains 100-200 ppmv CO and some SOx and NOx as well.
In general I found CO, SOx and NOx components should be removed compeletly before packed-column absorber in which an amine solvent (MEA)is used to absorb CO2 from flue gas.

I also found that the allowed range for SO2 in the flue gas as absorber feed is 10-100 ppmv and for NO2 is <10ppmv for a CO2 recovery plant with amine absorber. but I don't khow this amount of CO is allowed or not??