Upgrading of raw biogas into biomethane with structured nano-sized zeolite |NaK|-A adsorbents in a PVSA unit. (February 2019)

• Record Type: Journal Article
• Authors: Rzepka, Przemyslaw; Jasso-Salcedo, Alma Berenice; Janicevs, Arturs; Vasiliev, Petr; Hedin, Niklas
• Is Part Of: Energy procedia. Volume 158(2019)
• Page Start: 6715
• Page End: 6722
• Publication Date: 2019-02
• Subjects: CO2 adsortion -- biogas upgrading -- methane slip -- zeolite A -- nanoparticles; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2019.01.017
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: 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 |Na10 K2 |-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-|Na10 K2 |-A adsorbent had a low CH4 slip.