Dipartimento di Ingegneria Civile e Industriale (DICI), Università di Pisa, L. Lazzarino, 56126 Pisa, Italy.
Dipartimento di Ingegneria Civile e Industriale (DICI), Università di Pisa, L. Lazzarino, 56126 Pisa, Italy; Centro di Ricerca Interuniversitario Biomasse da Energia (CRIBE), Via vecchia di Marina, 6, 56122 Pisa, Italy.
Bioresour Technol. 2014 Dec;173:110-116. doi: 10.1016/j.biortech.2014.09.086. Epub 2014 Sep 28.
Biomass gasification couples the high power efficiency with the possibility of valuably using the byproducts heat and biochar. The use of agricultural wastes instead of woody feedstock extends the seasonal availability of biomasses. The downdraft type is the most used reactor but has narrow ranges of feedstock specifications (above all on moisture and particle size distribution), so tests on a demonstrative scale are conducted to prove the versatility of the gasifier. Measurements on pressure drops, syngas flow rate and composition are studied to assess the feasibility of such operations with corn cobs. Material and energy balances, and performance indexes are compared for the four tests carried out under different biomass loads (66-85 kg/h). A good operability of the plant and interesting results are obtained (gas specific production of 2 m3/kg, gas heating value 5.6-5.8 MJ/m3, cold gas efficiency in the range 66-68%, potential net power efficiency 21.1-21.6%).
生物质气化将高功率效率与有价值地利用副产品热量和生物炭的可能性结合在一起。使用农业废弃物代替木质原料，延长了生物质的季节性可用性。下吸式是最常用的反应器，但对原料规格（尤其是水分和粒径分布）的要求很严格，因此在示范规模上进行了测试，以证明气化炉的多功能性。对压降、合成气流量和成分进行了测量，以评估用玉米芯进行此类操作的可行性。对在不同生物质负荷下（66-85kg/h）进行的四次测试进行了物料和能量平衡以及性能指标的比较。该工厂具有良好的可操作性，并获得了有趣的结果（气体比产量为 2m3/kg，气体热值为 5.6-5.8MJ/m3，冷煤气效率在 66-68%之间，潜在净功率效率为 21.1-21.6%）。
