Upgrading of raw biogas into biomethane with structured nano-sized zeolite |NaK|-A adsorbents in a PVSA unit

Raw biogas is a renewable fuel that can be upgraded into biomethane using several technologies that include adsorption-driven processes. We evaluated two adsorbents using a lab-sized pressure-vacuum-swing adsorption (PVSA) unit. Pellets of nano-sized zeolite A (|Na12|-A and |Na10K2|-A) were prepared...

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Bibliographic Details
Published inEnergy procedia Vol. 158; pp. 6715 - 6722
Main Authors Rzepka, Przemyslaw, Jasso-Salcedo, Alma Berenice, Janicevs, Arturs, Vasiliev, Petr, Hedin, Niklas
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2019
Subjects
biogas upgrading
CO2 adsortion
methane slip
nanoparticles
zeolite A
methane slip
CO2 adsortion
zeolite A
nanoparticles
biogas upgrading
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Summary:Raw biogas is a renewable fuel that can be upgraded into biomethane using several technologies that include adsorption-driven processes. We evaluated two adsorbents using a lab-sized pressure-vacuum-swing adsorption (PVSA) unit. Pellets of nano-sized zeolite A (|Na12|-A and |Na10K2|-A) were prepared together with a clay-based binder and sintered for 1–3 h at 450–650°C. The pellets were subsequently PVSA tested to record the steady-state conditions and breakthrough of CO2. Numerous cycles were recorded with pellets that had been activated at 200°C under dynamic vacuum. The working capacity for CO2 removal exceeded 1.2 mol/kg at a raw-biogas pressure of 4 bar, and the nano-|Na10K2|-A adsorbent had a low CH4 slip.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2019.01.017