Experimental and modeling studies of the plasma chemistry in a humid Ar radiofrequency atmospheric pressure plasma jet
Experimental and modeling studies of the plasma chemistry in a humid Ar radiofrequency atmospheric pressure plasma jet
复制标题
湿氩射频大气压等离子体射流中等离子体化学的实验和建模研究
DOI：
10.1088/1361-6463/ac570a
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
P. Bruggeman
中科院分区：
文献类型：
--
作者：
Jingkai Jiang;V. S. Kondeti;G. Nayak;P. Bruggeman
虽然潮湿的大气压等离子体被广泛建模，这些条件下的反应集验证仍然有限。我们提出了一个详细的比较的建模和实验研究的目标，以阐明在潮湿的Ar射频驱动的大气压等离子体射流的等离子体化学。通过分子束质谱（MBMS）对射流中的自由基（H、OH、O、HO2）和长寿命物种（H2、O2和H2O2）进行了实验定量。通过与液相比色测量、激光诱导荧光（LIF）和双光子吸收LIF的直接比较，验证了H2O2、OH和H的MBMS测量。虽然一个很好的协议被发现为OH和H2O2通过这两种技术，一个显着的差异被发现为H和显示是由于在MBMS采样基板的边界层效应。测得的O，OH，HO2和H2是在很好的协议与塞模型，而H和O2被低估，H2O2被高估的模型。所使用的反应集和诊断的准确性，以及所观察到的建模和实验结果之间的差异，严格评估。在这项工作中提出的结果，使我们能够确定进一步的数据需要在低温等离子体中描述水蒸气化学。
While humid atmospheric pressure plasmas are extensively modeled, reaction set validation for these conditions remains limited. We present a detailed comparison of a modelling and experimental study with a goal to elucidate the plasma chemistry in a humid Ar radiofrequency-driven atmospheric pressure plasma jet. A large group of species including radicals (H, OH, O, HO2) and long-lived species (H2, O2 and H2O2) in the jet effluent was experimentally quantified by molecular beam mass spectroscopy (MBMS). MBMS measurements of H2O2, OH and H were validated by direct comparison with a liquid phase colorimetric measurement, laser-induced fluorescence (LIF) and two-photon absorption LIF respectively. While an excellent agreement was found for OH and H2O2 by both techniques, a significant difference was found for H and shown to be due to boundary layer effects at the MBMS sampling substrate. The measured O, OH, HO2 and H2 are in good agreement with the plug model while H and O2 were underestimated and H2O2 was overestimated by the model. The accuracy of both the used reaction set and the diagnostics, as well as the observed discrepancies between the modeling and experimental results, are critically assessed. The results presented in this work enable us to identify further data needs for describing H2O vapor chemistry in low-temperature plasmas.
影响因子：
3.8
作者：
Benedikt, J.;Schroeder, D.;Schulz-von der Gathen, V.
通讯作者：
Schulz-von der Gathen, V.