Enhanced CO2 conversion by frosted dielectric surface with ZrO2 coating in a dielectric barrier discharge reactor
Enhanced CO2 conversion by frosted dielectric surface with ZrO2 coating in a dielectric barrier discharge reactor
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DOI：
10.1016/j.jcou.2022.102045
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发表时间：
2022-05-05
影响因子：
7.7
通讯作者：
Liu, Chang-jun
中科院分区：
文献类型：
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作者：
Ding, Wanyan;Xia, Mengyu;Liu, Chang-jun
介质阻挡放电(DBD)低温等离子体直接将CO2转化为CO和O-2具有装置简单、通断容易、对CO2源灵活等优点。在这里，我们证明了在DBD反应器中，没有涂层和有涂层的磨砂介质表面与没有涂层的常规介质表面相比，可以显著提高等离子体CO2分解的转化率和能量效率。磨砂介质表面的使用增加了介质电容、平均电子能量和微放电通道，从而提高了二氧化碳转化率和能源效率。高介电常数的ZrO2涂层进一步改善了放电性能，进一步提高了CO2转化率和能量效率。在所测试的条件下，最高能效达到7.7%。由于包覆量较小，涂层对CO2的吸附作用可以忽略不计。
The direct conversion of CO2 into CO and O-2 by dielectric barrier discharge (DBD) non-thermal plasma is effective with simple setup, easy on/off operation and flexibility to the CO2 source. Herein, we demonstrated the frosted dielectric surface without and with ZrO2 coating can significantly improve the conversion and energy efficiency of the plasma CO2 decomposition in a DBD reactor, compared to the conventional un-frosted dielectric surface without ZrO2 coating. The use of the frosted dielectric surface increases the dielectric capacitance, mean electron energy and micro-discharge channels, leading to increased CO2 conversion and energy efficiency. The coating of ZrO2 of a high dielectric constant further improves the discharge performances with further increased CO2 conversion and energy efficiency. The highest energy efficiency of 7.7% was achieved within the tested conditions. The effect of CO2 adsorption on ZrO2 coating is negligible because of the low coating amount.