Ability to Model Caustic Wash Process in Aspen HYSYS V11
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Aspen HYSYS
Last Updated:
31-Mar-2020
Last Updated:
31-Mar-2020
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Article ID:
000096485
Article ID:
000096485
Primary Subject:
Problem Description:
Where can I find a sample example
of
Acid Gas Caustic Wash process available
in Aspen HYSYS V11 library?
Solution:
Aspen HYSYS
V11 features a new
Acid Gas – Caustic Wash
property package, which can be used to model the caustic wash process. The
Acid Gas – Caustic Wash
property package was developed with the Peng-Robinson equation of state for the vapor phase and the electrolyte non-random two-liquid (eNRTL) activity coefficient model for electrolyte thermodynamics (Song and Chen, 2009). The property package contains the eNRTL model parameters identified from regression of the available VLE data. The package also rigorously accounts for the chemistries of the caustic wash process.
During the caustic wash process, impurities such as H2S and light mercaptans are removed from light hydrocarbon feeds. This property package functions similarly to the other Acid Gas property packages. The primary difference is that caustic NaOH, rather than an amine or physical solvent, is used to remove acid gas from the feedstock.
The caustic wash system can be used for both liquid and vapor hydrocarbons. You can use the Absorber and Liquid-Liquid Extractor columns to simulate this process.
Several useful examples of the caustic wash process are provided in the
Aspen HYSYS
|
Samples
|
Acid Gas Cleaning
folder:
Acid Gas Cleaning Caustic Scrubber With Single Recirculating Loop.hsc
Acid Gas Cleaning Caustic Scrubber With Dual Recirculation Loops.hsc
Acid Gas Cleaning Caustic Wash With Selective Absorption Of H2S From Sour Gas.hsc
Acid Gas Cleaning Caustic Wash Removal Of Sulphur Compounds From Liquid Hydrocarbons.hsc
These can serve as templates for all supported processes.
Keywords:
Aspen HYSYS, Examples, Caustic wash, Acid Gas