too high lean amine loading
too high lean amine loading
(OP)
I built an amine Hysys simulation model and want to have 0.001 lean amine loading. However, my lean amine loading is around 0.06 which is 60 times higher than my desired value.
I was told that Hysys simulation software has some limitations so it cannot simulate that low loading.
Is that correct?
If not or if so, how can I get the desired amine loading with Hysys simulation?
I used amine package.
I was told that Hysys simulation software has some limitations so it cannot simulate that low loading.
Is that correct?
If not or if so, how can I get the desired amine loading with Hysys simulation?
I used amine package.





RE: too high lean amine loading
1. Make sure that you use Kent-Eisenberg model
2. Confirm regenerator reboiler temperature and operating pressure
3. How different is your rich amine loading in the model compared with true rich amine loading in the plant?
RE: too high lean amine loading
RE: too high lean amine loading
Thank you for your reply. I have some questions for you.
1. How can I use Kent-Eisenberg model in my Hysys simulation model?
2. My rich amine loading in the model is pretty much close to the true rich amine loading in the plant.
Only lean amine loading after regenerator is too high. I also found that design lean DEA loading is 5 times higher than the true lean DEA loading in the plant.
Thank you,
RE: too high lean amine loading
Composition data of rich DEA is given already, so I can't add any other component. But thank you for your advice.
RE: too high lean amine loading
RE: too high lean amine loading
That's the requirement. I should build a model with .001 lean amine loading. Operating reflux rate is around 100USGPM which is low I think. Thanks!
RE: too high lean amine loading
Any chance TSWEET is available to you?
Good luck.
RE: too high lean amine loading
RE: too high lean amine loading
The only reason you need ultra-low lean loadings is to achieve an extremely low residual outlet gas H2S/CO2/mercaptan spec. Maybe you should try and match the outlet contaminant % and let the loading end up where it wants. Or, try matching the reboiler heat duty or reflux flow to see what happens. The other approach is to try and match the temperature of the vapours going to the amine reflux condenser - that is a better measure of reboiler performance. Can you do a regen stripper temperature survey?
Trying to match a preset lean loading is a little bit sketchy - it's more important to match the resulting effect.
RE: too high lean amine loading
Back to original and
maddock question, why so low. If they insist, just tell them that is going to take more energy. If they need ultra low CO2 removal, look at mole sieves for polishing.
RE: too high lean amine loading
RE: too high lean amine loading
RE: too high lean amine loading
My senior engineer and I agreed that Hysys doesn't simulate that low loading as dcasto, It5q5p, Jason5000 mentioned. I'll try with other simulation software.
Thank you again.
RE: too high lean amine loading