Pressure Swing Adsorption for Biogas Upgrading with Carbon Molecular Sieve

Rafael L.S. Canevesi, Kari A. Andreassen, Edson A. Da Silva, Carlos E. Borba, Carlos A. Grande

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

This work focuses on the study of a pressure swing adsorption (PSA) process for biogas upgrading using a carbon molecular sieve adsorbent. Adsorption equilibrium and diffusion data of pure components were used to predict the multicomponent behavior. To validate the prediction of multicomponent adsorption at different concentrations, breakthrough curve experiments were performed for a gas mixture at different pressures (0.25, 0.5, 1, and 5 bar). Based on basic information, a model was used to predict the performance of a two-column PSA unit. The mixture used as feed was 60% CH4 and 40% CO2 with pressure swings between 5 bar in adsorption mode to 0.1 bar in blowdown. Experimental data demonstrated that the model could describe the PSA performance with good accuracy. We have evaluated the influence of different feed times in the biomethane recovery and purity. Biomethane purity higher than 97.5% with recovery higher than 90% was obtained.
Original languageEnglish (US)
Pages (from-to)8057-8067
Number of pages11
JournalIndustrial and Engineering Chemistry Research
Volume57
Issue number23
DOIs
StatePublished - Jun 13 2018
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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