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Performance Comparison of Different Separation Systems for H 2 Recovery from Catalytic Reforming Unit Off‐Gas Streams
Author(s) -
Mivechian A.,
Pakizeh M.
Publication year - 2013
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.201200558
Subject(s) - pressure swing adsorption , refinery , hydrogen , chemistry , mole fraction , adsorption , catalytic reforming , fraction (chemistry) , analytical chemistry (journal) , gas separation , absorption (acoustics) , tray , air separation , chromatography , chemical engineering , membrane , materials science , organic chemistry , composite material , mechanical engineering , biochemistry , engineering , oxygen
The performance of pressure swing adsorption (PSA), membrane separation, and gas absorption systems for H 2 recovery from refinery off‐gas stream was studied by simulation‐based data. The PSA process was simulated using adsorbents of silica gel and activated carbon for removing heavy and light hydrocarbons. The mole fraction profiles of all components and the relationship between hydrogen purity and recovery as a function of feed pressure were examined. The solution‐diffusion model was applied for modeling and simulation of a one‐stage membrane process. The gas absorption process with a tower tray was simulated at sub‐zero temperature and the correlation between hydrogen purity and recovery as a function of tower pressure and temperature was evaluated at different solvent flow rates.