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Catalytic gasification of pinewood biomass in a fluidized bed reactor with dolomite, limestone, and activated carbon: An experimental study

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  • Mohanty, Rajaram
  • Mahanta, Pinakeswar
  • Mahapatro, Abinash
  • Sharma, Ram Prakash

Abstract

The biomass residues from non-edible crop portions or agro-industrial are good fuel for hydrogen-rich syngas production since they reduce waste and promote sustainability. Dolomite was utilized as a natural catalyst for biomass gasification in a fluidized bed gasifier with air as a gasifying agent to increase syngas quality. The study examines the impact of temperature (700–850 °C), equivalency ratio (0.2–0.35), and catalyst-to-biomass blending proportion (10–50 %) on syngas composition. This study examined gasification's lower heating value, dry gas output, carbon conversion efficiency, cold gas efficiency, and tar yield. A temperature above 800 °C, an equivalence ratio of 0.30, and a dolomite concentration of 40 % are the best operating conditions to achieve the best clean gas (minimum tar yield = 1.87 g/Nm3). The maximum concentration of H2 (11.23 %) was achieved at 850 °C, an equivalence ratio of 0.20, and a dolomite concentration of 50 % with the biomass. The present study confirms the potential of natural catalysts to reduce tar and enhance H2 contents by absorbing CO2. As compared to costly synthetic catalysts natural-based catalysts are cost-effective and the flexible ex-situ gas cleaning beds have the potential to be easily scalable for industrial-scale production.

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  • Mohanty, Rajaram & Mahanta, Pinakeswar & Mahapatro, Abinash & Sharma, Ram Prakash, 2025. "Catalytic gasification of pinewood biomass in a fluidized bed reactor with dolomite, limestone, and activated carbon: An experimental study," Energy, Elsevier, vol. 325(C).
    • Handle: RePEc:eee:energy:v:325:y:2025:i:c:s0360544225017736
    DOI: 10.1016/j.energy.2025.136131
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    References listed on IDEAS

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