Chinese Optics Letters, Volume. 21, Issue 1, (2023)

Preliminary study on direct measurements and diagnostics for chemical reaction dynamics of NOx by using laser wavelength modulation spectroscopy [Early Posting]

Li Yongjian, Zhang Shuai, Li Jinyi, Xiao-tao Yang, Meng Yunfei, Liu Xu, Du Zhenhui
Author Affiliations
  • Tianjin University State Key Laboratory of Precision Measuring Technology and Instruments
  • Tianjin Key Laboratory of Intelligent Control of Electrical Equipment
  • College of Power and Energy Engineering, Harbin Engineering University
  • show less

    Studies on the kinetics of gas-phase chemical reactions currently rely on calculations or simulations and lack simple, fast, and accurate direct measurement methods. We developed a tunable laser molecular absorption spectroscopy (TLAS) measurement system to achieve direct measurements of such reactions by using wavelength modulated spectroscopy, and have performed direct online measurements and diagnostics of molecular concentration, the heat of reaction, and pressure changes during the redox reaction of ozone with nitrogen oxides with a time resolution of 0.1 s. This study provides a promising diagnostic tool for the study of gas-phase chemical reaction kinetics.

    Paper Information

    Manuscript Accepted: Aug. 4, 2022

    Posted: Aug. 5, 2022

    DOI: COL-0289