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Absorber simulation and design using a nonequilibrium stage model
Author(s) -
Krishnamurthy R.,
Taylor R.
Publication year - 1986
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450640114
Subject(s) - non equilibrium thermodynamics , absorption (acoustics) , ammonia , methanol , stage (stratigraphy) , thermodynamics , hydrocarbon , chemistry , materials science , organic chemistry , physics , paleontology , biology , composite material
A nonequilibrium stage model of multicomponent separation processes is used to simulate three representative nonisothermal gas absorption processes: (i) the absorption of ammonia from air using water, (ii) the purification of an acid gas stream using cold methanol and (iii) a process in which a heavy hydrocarbon oil is used to absorb a mixture of lighter hydrocarbons. The temperature profiles and terminal stream compositions predicted by the model compare well with experimental measurements on the ammonia/air/water and acid gas/methanol systems. The case study involving the absorption of light hydrocarbons is used to demonstrate that there can be large differences between designs based on the nonequilibrium stage model and the efficiency‐modified‐equilibrium‐stage model.