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Energetic Optimization of the Three‐Stage Gas Permeation Process for the Upgrading of Biogas
Author(s) -
Kube Jürgen
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900351
Subject(s) - permeation , biogas , process engineering , gas compressor , isobaric process , countercurrent exchange , isothermal process , gas separation , chemistry , process (computing) , engineering , thermodynamics , waste management , membrane , mechanical engineering , computer science , physics , biochemistry , operating system
The mass balances of countercurrent gas permeation modules for the separation of multicomponent gas mixtures are formulated as a boundary value problem, using the ideal gas law and isobaric isothermal stages. The balances are extended for the common three‐stage gas permeation process for the upgrading of biogas. The solution is calculated with MATLAB's BVP4C boundary value solver. The process is optimized by means of the FMINCON SQP‐algorithm towards lowest power consumption. Parameter variations are conducted, highlighting the impact of product and lean‐gas quality setpoints, biogas composition, membrane surface and selectivity, permeate compression, and choice of compressor model on the energetic optimum.