The chemical looping co-gasification (CLCG) of biomass and biochar provides an attractive approach for producing sustainable syngas. The novelty of this study is to investigate the CLCG of cotton stalk and rice husk char with BaFe2O4/50 % MgAl2O4 (BFMA5) oxygen carrier for syngas production. Individual gasification, co-gasification, and individual chemical looping gasification (CLG) were also evaluated for comparison. The results revealed that the yield of gas products in co-gasification was greater than that in the algebraic superposition of individual gasification, ascribed to the synergist effects during co-gasification. On the other hand, compared to co-gasification, the CLCG with the existence of BFMA5 oxygen carrier improved the syngas yield and carbon conversion 1.64 times and 26.2 %, respectively. While, the CLCG improved the syngas yield and carbon conversion 1.13 times and 8.3 %, respectively, compared to the algebraic superposition of individual CLG due to the synergist effects. Furthermore, the cyclic test exhibited that the BFMA5 oxygen carrier has good stability and performance in CLCG, which is attributed to the ability of MgAl2O4 to resist sintering simultaneously with alleviating ash effect as a result of mixing cotton stalk (having low ash content) with rice husk char. Overall, blending cotton stalk and rice husk char is promising for producing syngas from the CLCG.

中文翻译：

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BaFe2O4/MgAl2O4 氧载体化学链共气化棉秆和稻壳生物炭生产合成气


生物质和生物炭的化学循环共气化（CLCG）为生产可持续合成气提供了一种有吸引力的方法。本研究的新颖之处在于研究了用于合成气生产的 BaFe2O4/50% MgAl2O4 (BFMA5) 氧载体的棉秆和稻壳炭的 CLCG。还对单独气化、共气化和单独化学循环气化（CLG）进行了评估以进行比较。结果表明，共气化中气体产物的收率高于单独气化代数叠加的气体产物收率，这归因于共气化过程中的协同效应。另一方面，与共气化相比，BFMA5载氧体存在的CLCG合成气收率和碳转化率分别提高了1.64倍和26.2%。同时，由于协同效应，与单个CLG的代数叠加相比，CLCG将合成气产率和碳转化率分别提高了1.13倍和8.3%。此外，循环测试表明，BFMA5氧载体在CLCG中具有良好的稳定性和性能，这归因于MgAl2O4具有抗烧结能力，同时减轻了棉秆（灰分含量较低）与稻米混合时的灰分影响胡斯克角总体而言，混合棉秆和稻壳炭有望通过 CLCG 生产合成气。