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The pressurized jet aerator: A new aeration system for high-performance H2O2 electrolyzers
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2018-02-17 , DOI: 10.1016/j.elecom.2018.02.012
J.F. Pérez , J. Llanos , C. Sáez , C. López , P. Cañizares , M.A. Rodrigo

The transport of oxygen to the cathodic surface is a key factor in the rapid and efficient electrogeneration of H2O2. In this work, a new aeration system is presented: the pressurized jet aerator, which is characterized by the synergistic coupling of a pressurized circuit with a jet aerator. Under the same liquid flow and pressure, this aerator significantly increases the oxygen mass flow supplied to the system. At 160 dm3 h−1 and 6 bar, the aeration capacity of the setup including the jet aerator is three times greater than the pressurized system without it (21.9 vs. 7.6 g O2 h−1). The aeration capacity of the jet increases with pressure and a greater oxygen flow is aspired (5.7 vs. 14.2 g O2 h−1, at 1 and 6 bar, respectively) at the same liquid flow (160 dm3 h−1), thanks to the higher gas density. This system can also collect O2 evolved at the anode, providing up to 50% of the stoichiometric requirement, thus valorizing a by-product and reducing the energy required for pressurization. H2O2 is generated more rapidly in the proposed system than in either the jet aerator under room conditions or in the pressurized system without a jet, demonstrating the power and potential of this system to aerate high-performance H2O2 electrolyzers.



中文翻译:

加压射流曝气器:一种用于高性能H 2 O 2电解槽的新型曝气系统

氧气向阴极表面的运输是H 2 O 2快速有效发电的关键因素。在这项工作中,提出了一种新的曝气系统:加压射流曝气器,其特征在于加压回路与射流曝气器的协同耦合。在相同的液体流量和压力下,该曝气器显着增加了供应给系统的氧气质量流量。在160 dm 3  h -1和6 bar的压力下,包括射流曝气器在内的装置的曝气能力是不带加压曝气器的加压系统的三倍(21.9 vs. 7.6 g O 2  h -1)。在相同的液体流量(160 dm 3  h -1)下,射流的通气能力会随着压力的增加而增加,并吸引更大的氧气流量(分别为5.7和14.2 g O 2  h -1,分别为1和6 bar ),得益于更高的气体密度。该系统还可以收集在阳极放出的O 2,提供最高50%的化学计量要求,从而使副产品平衡,并降低了加压所需的能量。与在室内条件下的射流曝气器或在没有射流的加压系统中相比,在所建议的系统中生成H 2 O 2的速度更快,这证明了该系统对高性能H 2进行充气的能力和潜力O 2电解槽。

更新日期:2018-02-17
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