Biomass Chemical Looping Gasification (BCLG) is an autothermic gasification process that provides pure syngas for many applications, including liquid biofuels production. Finding low-cost materials that can be used in the process is a key issue, especially when they come from waste. In this sense, LD Slag is a by-product of the steel industry used as an oxygen carrier in Chemical Looping Combustion with good results. This work investigates the use of LD Slag as oxygen carrier in a continuous 1.5 kW_th BCLG unit. The effect of the main operational variables (temperature, oxygen-to-fuel and steam-to-biomass ratios) and the use of CO₂ instead of steam as gasification agent were analysed. LD slag allowed the process with high biomass conversions, X_b > 90%, carbon conversion efficiencies, η_cc > 90%, and syngas yields, Y ≈ 0.66 Nm³/kg of dry biomass, at conditions corresponding to autothermal operation. A lifetime of 300 h under reducing conditions was inferred and agglomeration problems were never detected. LD slag can be considered a suitable material for BCLG since it is possible to obtain high-quality syngas at autothermal conditions from different types of biomass with low tar generation and CO₂ emissions.

生物质化学循环气化 (BCLG) 是一种自热气化工艺，可为许多应用提供纯合成气，包括液体生物燃料生产。寻找可用于该过程的低成本材料是一个关键问题，尤其是当它们来自废物时。从这个意义上说，LD Slag 是钢铁工业的副产品，在化学循环燃烧中用作氧气载体，效果很好。这项工作调查在连续1.5千瓦使用LD炉渣作为氧载体_个BCLG单元。分析了主要操作变量（温度、氧气与燃料和蒸汽与生物质的比率）和使用 CO ₂代替蒸汽作为气化剂的影响。LD 炉渣允许该过程具有高生物质转化率，X _b > 90%，碳转化效率，η _cc  > 90%，和合成气产率，Y  ≈ 0.66 Nm ³ /kg 干生物质，在对应于自热操作的条件下。推断在还原条件下的寿命为 300 小时，并且从未检测到结块问题。LD 炉渣可以被认为是 BCLG 的合适材料，因为它可以在自热条件下从不同类型的生物质中获得高质量的合成气，并且焦油生成和 CO ₂排放量低。