How does one calculate amine loading for an amine absorber?
Answers
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21/11/2011
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A:
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Alan Goelzer, Jacobs Consultancy, alan.goelzer@jacobs.com
There are both rich amine and lean amine loadings in terms of moles acid gases per circulating moles of amine.
Acid gas = H2S + CO2
Circulating moles = TPH solution rate times wt% amine divided by M.W. of amine
Lean loadings typically run 0.02 to 0.05 moles per mole
Rich loadings typically range from 0.30 to 0.60 moles per mole
Delta acid gas loading is difference
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20/11/2011
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A:
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Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
Please see this link:
http://www.eng-tips.com/viewthread.cfm?qid=301005
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19/11/2011
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A:
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Egbert van Hoorn, Hocon B V, Egbertvh@hotmail.com
This is quite difficult to do and the results are not very reliable.
Basically you can make a balance based on the temperatures of the gas and amine going in and going out.
With this heat and mas balance you should obtain an excess of heat.
This heat is due to the reaction between H2S and the amine.
This can be calculated back to an amine loading.
I have very rarely seen this work, although it is a standard approach for Exxon.
Not many absorbers in refineries have all the four temperatures.
Flows are not always reliable.
This is why it is better to measure the loading of a column.
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