Abstract In this study, a modified rotating gliding arc (RGA) plasma reactor with fan-shaped swirl generator coupled with Ni/γ-Al2O3 catalyst was investigated for the steam reforming of gasification tar from waste materials, taking toluene as the tar surrogate. The system performance was evaluated in terms of tar conversion, energy efficiency, yield of product gas, as well as synergistic capability of plasma catalysis, with particular attention on the effects of specific energy input (SEI), positioning of the catalysts, and Ni loading of catalysts. Different characterizations of catalysts including N2 adsorption-desorption, XRD, H2-TPR, and TEM were conducted to study the properties of catalysts. Incorporation of catalyst placed sufficiently far from the anode increased toluene conversion which indicated the synergy between plasma and catalysis for tar conversion. A toluene conversion of up to 91.9% can be achieved with a distance of 62 mm between the catalyst and the anode, which was 21% higher than that in the plasma alone system. The toluene conversion can be further increased to 94.7% when the Ni loading was increased from 4% to 16%. The synergistic capability of plasma catalysis was demonstrated from an enhanced toluene conversion and the increased formation of value-added fuel gases such as H2, CO, and CH4, together with simultaneously a selective reduction in CO2 formation, especially when the Ni loading was 4% and 8%. Identification of liquid by-products also revealed the synergy between plasma and catalysis which transformed bi-radical HC CH into gaseous products, prohibiting the formation of indene and naphthalene.

中文翻译：

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改进的旋转滑移弧等离子体反应器中 Ni 催化剂上气化焦油的破坏：催化剂位置和镍负载的影响

摘要 在本研究中，以甲苯为焦油替代物，研究了一种改进的带有扇形涡流发生器和Ni/γ-Al2O3 催化剂的旋转滑翔弧(RGA) 等离子体反应器，用于对废料中的气化焦油进行蒸汽重整。从焦油转化率、能源效率、产品气体产率以及等离子体催化的协同能力方面评估系统性能，特别关注比能量输入 (SEI)、催化剂位置和 Ni 负载量的影响的催化剂。对催化剂进行了不同的表征，包括 N2 吸附-解吸、XRD、H2-TPR 和 TEM，以研究催化剂的性能。结合放置在离阳极足够远的地方的催化剂增加了甲苯转化率，这表明等离子体和焦油转化催化剂之间的协同作用。在催化剂和阳极之间的距离为 62 mm 的情况下，甲苯转化率最高可达 91.9%，比单独使用等离子体系统高 21%。当 Ni 负载量从 4% 增加到 16% 时，甲苯转化率可以进一步提高到 94.7%。等离子体催化的协同能力体现在甲苯转化率的提高和增值燃料气体（如 H2、CO 和 CH4）的形成增加，同时选择性减少 CO2 的形成，尤其是当 Ni 负载量为 4% 时和 8%。