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Optimizing temperature-swing adsorption for biogas Purification: Experimental insights and pilot-scale validation

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  • Kamlekar, Poonam
  • Jha, Mithilesh Kumar
  • Kundu, Krishnendu
  • Kishore, Brij

Abstract

The global shift towards renewable energy demands efficient and accessible technologies for converting raw biogas into high purity biomethane. This study introduces a compact and practical inline purification system based on temperature swing adsorption (TSA) to selectively remove CO2, H2S, and moisture. A layered adsorbent bed composed of silica gel, activated carbon, and zeolite was optimized to achieve methane purity exceeding 97 %. Our parametric studies demonstrate that optimizing L/D ratios, adsorbent ratios, particle sizes, and flow rates significantly enhances adsorption-desorption performance. The techno-economic analysis confirms the system's viability for small to medium-scale applications, emphasizing its cost-effectiveness and affordability. Operational stability and effective methane enrichment were achieved through optimized adsorbent sizing and temperature swing cycling. This setup facilitates the capture of approximately 0.157–1.57 tonnes per year (TPY) of methane, thereby supporting greenhouse gas conservation and contributing to environmental sustainability.

Suggested Citation

  • Kamlekar, Poonam & Jha, Mithilesh Kumar & Kundu, Krishnendu & Kishore, Brij, 2026. "Optimizing temperature-swing adsorption for biogas Purification: Experimental insights and pilot-scale validation," Renewable Energy, Elsevier, vol. 256(PC).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pc:s0960148125017240
    DOI: 10.1016/j.renene.2025.124060
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