Devolatilization of Residual Biomasses for Chemical Looping Gasification in Fluidized Beds Made Up of Oxygen-Carriers

The chemical looping gasification of residual biomasses—operated in fluidized beds composed oxygen-carriers—may allow the production biofuels from syngas. This biomass-to-fuel chain can contribute to mitigate climate change, avoiding accumulation greenhouse gases our atmosphere. ongoing European research project Horizon2020 CLARA (G.A. 817841) investigates wheat-straw-pellets (WSP) and raw-pine-forest-residue (RPR) pellets as feedstocks for gasification. work presents experimental results devolatilizations WSP RPR, bubbling made three different oxygen-carriers or sand (inert reference), at 700, 800, 900 °C. Devolatilization is a key step gasification, influencing syngas quality quantity. Tests were performed laboratory-scale, by quartz reactor (fluidizing agent: N2). For each pellet, collected data allowed quantification released (H2, CO, CO2, CH4, hydrocarbons) mass balances, obtain gas yield (ηav), carbon conversion (χavC), H2/CO ratio (λav) composition. A simplified single-first order-reaction model was adopted kinetically analyze data. RPR; this good indication, considering that RPR similar commercial pellets. Temperature dominating parameter: °C, highest quantity obtained (WSP: ηav = 0.035–0.042 molgas gbiomass−1, χavC 73–83%, λav 0.8–1.0); RPR: 0.036–0.041 67–71%, 0.9–1.0), oxygen-carries generally better than sand. kinetic analysis suggested oxygen-carrier ilmenite ensured fastest C H atoms into gases, tested conditions.