Dynamics of fractionators with structured packing

Wang F.Y. and Cameron I.T. (1993) Dynamics of fractionators with structured packing. Chemical Engineering Communications, 119 1: 231-259. doi:10.1080/00986449308936118


Author Wang F.Y.
Cameron I.T.
Title Dynamics of fractionators with structured packing
Journal name Chemical Engineering Communications   Check publisher's open access policy
ISSN 1563-5201
Publication date 1993-01-01
Sub-type Article (original research)
DOI 10.1080/00986449308936118
Volume 119
Issue 1
Start page 231
End page 259
Total pages 29
Subject 1500 Chemical Engineering
1600 Chemistry
Abstract A generalized dynamic model of a distributed staged (packed) fractionator is developed in this work. In particular we consider the dynamics of fractionators which employ structured packings as a means of achieving mass and heat transfer in multi-component systems. The mathematical model is described by a large set of partial and ordinary differential equations coupled with non-linear algebraic constraints (PODAEs). These equations arise from the mass and energy balances on a distributed column-section together with the fluid dynamic relations. A computational algorithm is developed which employs a polynomial approximation leading to a large differential-algebraic equation (DAE) system. This is solved using standard implicit DAE algorithms. in this work, the liquid holdup and transfer coefficients (both mass and heat) are computed from established correlations and detailed thermodynamic relations. This differs from most of the previous work reported, which used very simple correlations based on a single variable such as liquid or vapour rate. The results show that the more rigorous computation of transfer coefficients is essential to the veracity of the model. The model has been applied to the case of an industrial depropanizer which uses a Mellapak 250Y structured packing. The generalized model can be used to study the control and optimization of such fractionators, which are becoming more prolific in the petroleum and related industries.
Keyword Collocation
Dynamics
Fractionators
Modeling
Packing
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 16 Aug 2016, 13:59:39 EST by System User