Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
J Hazard Mater. 2018 Jan 15;342:297-305. doi: 10.1016/j.jhazmat.2017.08.024. Epub 2017 Aug 12.
The relative abundance and low cost of electric arc furnace dust (EAFD) make it a viable oxygen carrier for chemical looping combustion (CLC) system. Under a reducing agent, zinc ferrite (ZnFeO) phase in EAFD releases zinc vapor in a complex gas-solid reaction. In an effort to suppress the emission of zinc vapor, the reaction mechanism of ZnFeO prepared as an oxygen carrier in a redox cycling test is primarily discussed, as well as the issue of coupling with an inert AlO support. The study focused the investigation on redox cycling behavior and CO2 conversion in ZnFeO/AlO and EAFD/AlO systems using a thermogravimetric analyzer (TGA) and fixed-bed reactor (FxBR). In a lab-scaled semi-fluidized bed reactor (semi-FzBR) of EAFD/AlO as an oxygen carrier system, a high CO gas yield approximately 0.98 after fifty redox cycles is also experimentally obtained. It can be anticipated that the use of EAFD/AlO system as an oxygen carrier in a reversible CLC process could be economical and environmentally beneficial.
电弧炉粉尘（EAFD）相对丰富且成本低廉，使其成为化学链燃烧（CLC）系统中可行的载氧体。在还原剂存在下，EAFD 中的锌铁尖晶石（ZnFeO）相在复杂的气固反应中释放锌蒸气。为了抑制锌蒸气的排放，主要讨论了作为氧化还原循环测试中的载氧体制备的 ZnFeO 的反应机理，以及与惰性 AlO 载体的偶联问题。该研究使用热重分析仪（TGA）和固定床反应器（FxBR）重点研究了 ZnFeO/AlO 和 EAFD/AlO 系统的氧化还原循环行为和 CO2 转化。在 EAFD/AlO 作为载氧体系统的实验室规模半流化床反应器（semi-FzBR）中，经过五十次氧化还原循环后，还可获得约 0.98 的高 CO 气体产率。可以预期，将 EAFD/AlO 系统用作可逆 CLC 过程中的载氧体在经济和环境方面都是有益的。
