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- W2507318850 abstract "Concentrated solar energy provides heat to drive biomass pyrolysis reactions, which upgrades the feedstock energy by storing solar energy in chemical forms (bio-gas, bio-oil and bio-char). Thanks to high temperature and fast heating rate, more pyrolytic gas with high lower heating value (LHV) can be produced by direct solar pyrolysis. Experiments have highlighted the effect of solar pyrolysis parameters on products yields, composition and properties. The total gas LHV dramatically increases (5-fold) with increasing temperature (from 600°C to 1200°C) and sample heating rate (from 5°C/s to 50°C/s), which is mainly due to variations in the CO and H2 yields. The interaction between temperature and heating rate enhances at both high ranges. The maximum gas products LHV (14 589 kJ/kg of beech wood) was obtained at 2000°C and 450°C/s heating rate. The collected char and tar were analyzed and characterized, which emphasizes the temperature and heating rate effects. And the energy upgrade factor is determined as about 1.5 independent of temperature. At the same time, a 2D unsteady CFD particle model (simplified assumption using first-order Arrhenius type reactions) with heat and mass transfers was developed for solar pyrolysis. Numerical model predictions are in good agreement with experimental observations. Stoichiometric coefficients about the mass fraction of primary tar converted by the reaction to gas and secondary tar were determined at different temperatures and heating rates for the first time. The evolution of the final products and mass losses of biomass are enhanced with temperature and heating rate increase." @default.
- W2507318850 created "2016-09-16" @default.
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- W2507318850 date "2016-04-01" @default.
- W2507318850 modified "2023-09-27" @default.
- W2507318850 title "Solar pyrolysis of biomass at laboratory scale" @default.
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