Experimental and theoretical study on H2/CO2 separation by a five-step one-column psa process

Wang Gi Kim, Jaeyoung Yang, Sangsup Han, Chanhwi Cho, Chang Ha Lee, Hanju Lee

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20 Citations (Scopus)

Abstract

An experimental and theoretical study is performed for bulk separation of H2/CO2 mixture (70/30 volume %) by PSA process with zeolite 5A, a process widely used commercially in conjunction with the catalytic steam reforming of natural gas or naphtha. For the optimized adsorption conditions of PSA, the characteristics of adsorption/desorption characteristics have been studied through breakthrough and desorption experiments under various conditions. The purge-to-feed ratio is important to the H2 product purity only at a long adsorption step time. H2 could be concentrated from 70% in the feed to 99.99% at H2 recovery of 67.5%. The results of all five steps in PSA are successfully predicted by the LDF model considering an energy balance and nonlinear isotherm. For the model, the effective diffusivities (D,) are obtained separately from the uptake curves of H2 and CO2. The Langmuir-Freundlich isotherm is used to correlate the experimental equilibrium data and is very well fitted to the results.

Original languageEnglish
Pages (from-to)503-511
Number of pages9
JournalKorean Journal of Chemical Engineering
Volume12
Issue number5
DOIs
Publication statusPublished - 1995 Nov

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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