Study on the Optical Characteristics of CO/Ar Radio-frequency Discharge at Atmospheric Pressure
张凯1,2, 张帅1*,*, 高远1, 孙昊1,2, 严萍1,2, 邵涛1,2,3
1.电力电子与电气驱动重点实验室(中国科学院电工研究所),北京市 海淀区 100190
2.中国科学院大学,北京市 石景山区 100049
3.中国科学院洁净能源创新研究院,辽宁省 大连市 116023
ZHANG Kai1,2, ZHANG Shuai1,*, GAO Yuan1, SUN Hao1,2, YAN Ping1,2, SHAO Tao1,2,3
1. Key Laboratory of Power Electronics and Electric Drive (Institute of Electrical Engineering, Chinese Academy of Sciences), Haidian District, Beijing 100190, China
2. University of Chinese Academy of Sciences, Shijingshan District, Beijing 100049, China
3. Dalian National Laboratory for Clean Energy, CAS, Dalian 116023, Liaoning Province, China
基金项目:
国家自然科学基金(重点项目)(51637010);
国家自然科学基金(青年科学基金项目)(51707186);
中国科学院洁净能源创新研究院合作基金项目(DNL180204);
Project Supported by National Natural Science Foundation of China (Key Program) (51637010);
National Natural Science Foundation of China (Young Scientistic Program) (51707186);
DNL Cooperation Fund, CAS (DNL180204);
Pulse modulation radio-frequency (RF) has lots of adjustable parameters (modulation frequency, duty cycle, input power and so on), which can regulate plasma parameters at a large scope. Compared to AC or DC discharge, RF discharge has its distinctive features. This paper presented experimental study on optical properties of Ar/CO2 discharge driven by a 13.56 MHz RF power system at atmospheric pressure, and the main task was to investigate the influences of modulation parameters and gas composition on plasma plumes, optical emission spectrum (OES) intensity and electron excitation temperature. The results show that changing the RF modulation parameters can significantly regulate the optical properties: increasing the input power and duty cycle, or decreasing the modulation frequency and CO2 content can increase the plasma plume length and electron excitation temperature. Main feature spectra are OH (A→X), N2(C→B), Ar (4p→4s), O (3p→3s), C (1p-1s), C2 swan and so on, and their intensities are obviously enhanced with the increase of input power and the decrease of CO2 content. This study provides more options for RF discharge plasma technology to improve CO2 utilization efficiency.
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