甲烷/氮气辉光放电产物的红外吸收光谱研究

doi:10.3969/j.issn.1007-5461.2021.05.012

量子电子学报 ›› 2021, Vol. 38 ›› Issue (5): 677-683.doi: 10.3969/j.issn.1007-5461.2021.05.012

• “激光光谱新技术与应用”专辑 • 上一篇下一篇

甲烷/氮气辉光放电产物的红外吸收光谱研究

钱佳丽, 黄晓东, 刘珂, 邓伦华∗

华东师范大学精密光谱科学与技术国家重点实验室, 上海 200062

收稿日期:2021-01-04 修回日期:2021-01-26 出版日期:2021-09-28 发布日期:2021-09-28
通讯作者: E-mail: lhdeng@phy.ecnu.edu.cn E-mail:lhdeng@phy.ecnu.edu.cn
作者简介:钱佳丽 ( 1996 - ), 女, 浙江杭州人, 研究生, 主要从事激光吸收光谱方面的研究。 E-mail: 51180920027@stu.ecnu.edu.cn
基金资助:
Supported by the Open Fund of State Key Laboratory of Precision Spectroscopy (精密光谱科学与技术国家重点实验室开放课题基金)

Infrared absorption spectra of methane/nitrogen glow discharge products

QIAN Jiali, HUANG Xiaodong, LIU Ke, DENG Lunhua∗

State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China

Received:2021-01-04 Revised:2021-01-26 Published:2021-09-28 Online:2021-09-28

摘要/Abstract

摘要： 甲烷 (CH4) 和氮气 (N2) 是很多类地星体的主要气体成分, HCN、 CN、 C2H2 等分子是以这两种混合气体为母体的主要产物。实验利用 CH4/N2 放电等离子体模拟主要产物分子的形成过程, 并基于中红外波长调制吸收光谱技术, 通过测量 HCN 和 C2H2 的吸收光谱研究了其浓度演化过程。实验结果表明 HCN 和 C2H2 的相对浓度依赖母体分子中的 C/N 比例。母体分子中 N2 过量有利于 HCN 的生成, 而 CH4 过量有利于 C2H2 的形成。 CH4 和 N2 的浓度配比实验表明, HCN 的主要生成途径为 CH3+N!HCN+H2。此外, CH4/N2 辉光放电生成的 C2H2 也可能进一步与 N2 结合生成 HCN。

关键词: 光谱学, 等离子光谱, HCN分子, 吸收光谱, 波长调制光谱

Abstract: Mehane (CH4) and nitrogen (N2) are two main gas components of many terrestrial stars, and HCN, CN and C2H2 et al are the main products from the mixture of these two gases. The formation process of the main products is simulated by CH4/N2 discharge plasma, and the relative concentrations of HCN and C2H2 are obtained by measuring the absorption spectra based on mid-infrared wavelength modulation absorption spectroscopy. The results show that the relative concentrations of HCN and C2H2 depend on the ratio of C/N in the mixed gases, and excess N2 is beneficial to the formation of HCN, while excess CH4 is beneficial to the formation of C2H2. Further study shows that the main formation pathway of HCN is CH3+N! HCN+H2. In addition, C2H2 generated by CH4/N2 glow discharge may further combine with N2 to form HCN.

Key words: spectroscopy, plasma spectrum, HCN molecules, absorption spectroscopy, wavelength modulation spectroscopy

中图分类号:

O433.1

钱佳丽, 黄晓东, 刘珂, 邓伦华∗. 甲烷/氮气辉光放电产物的红外吸收光谱研究[J]. 量子电子学报, 2021, 38(5): 677-683.

QIAN Jiali, HUANG Xiaodong, LIU Ke, DENG Lunhua∗. Infrared absorption spectra of methane/nitrogen glow discharge products[J]. Chinese Journal of Quantum Electronics, 2021, 38(5): 677-683.

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甲烷/氮气辉光放电产物的红外吸收光谱研究

Infrared absorption spectra of methane/nitrogen glow discharge products

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