SOLAR THERMAL GASIFICATION OF BIOMASS
DOI:
https://doi.org/10.59627/cbens.2012.2232Palavras-chave:
Solar thermochemistry, Biomass, Solar fuelsResumo
Solar thermal steam-gasification of carbonaceous materials uses concentrated solar energy as source of the high-temperature process heat. The main advantage compared to autothermal processes is an upgrade of the feedstock’s calorific value by up to 33 % instead of a 30 % energy penalty due to consumption of the feedstock for the generation of the process heat. This process represents thus an efficient way of converting intermittent solar energy into an easily storable and dispatchable chemical form. Three innovative reactor designs based on packed beds and entrained flows have been developed and experimentally demonstrated for the combined pyrolysis and gasification of biomass, charcoal, petcoke, coal, and carbonaceous waste feedstocks: indirectly-irradiated packed-bed reactor, directly-irradiated vortex-flow reactor, and indirectly-irradiated entrained-flow reactor. They are compared by their main performance parameters, solar-to-fuel energy conversion efficiency and energetic upgrade factor. The performance of a 10 MW commercial-scale indirectly-irradiated entrained-flow reactor is predicted by numerical simulation.
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