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Numerical Simulation and Optimization of 4-Component LDG Separation in the Steelmaking Industry Using Polysulfone Hollow Fiber Membranes

Authors :
Jong-Yeol Jeon
Bo-Ryoung Park
Jeong-Hoon Kim
Source :
Membranes, Vol 12, Iss 1, p 97 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

A general finite element model and a new solution method were developed to simulate the permeances of Lintz Donawiz converter gas (LDG) components and the performance of a polysulfone membrane separation unit. The permeances at eight bars of CO, N2, and H2 in LDG simulated using the developed model equations employing the experimental mixed gas data were obtained by controlling the finite element numbers and comparing them with pure gas permeation data. At the optimal finite element numbers (s = 15, n = 1), the gas permeances under the mixed-gas condition were 6.3% (CO), 3.9% (N2), and 7.2% (H2) larger than those of the pure gases, On the other hand, the mixed-gas permeance of CO2 was 4.5% smaller than that of pure gas. These differences were attributed to the plasticization phenomenon of the polysulfone membrane used by CO2. The newly adopted solution method for the stiff nonlinear model functions enabled the simulation of the performance (in terms of gas recovery, concentration, and flow rate) of the first-stage membrane within two seconds under most gas flow conditions. The performance of a first-stage membrane unit separating LDG could be predicted by the developed model with a small error of

Details

Language :
English
ISSN :
20770375
Volume :
12
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Membranes
Publication Type :
Academic Journal
Accession number :
edsdoj.6d16b80510aa413a95205c58bcbcd70b
Document Type :
article
Full Text :
https://doi.org/10.3390/membranes12010097