期刊
CURRENT APPLIED PHYSICS
卷 36, 期 -, 页码 83-87出版社
ELSEVIER
DOI: 10.1016/j.cap.2021.12.015
关键词
Terahertz; Concentration; Rotational transition; Absorption line; Hydrogen cyanide
In this study, a real-time measurement system was developed to determine the concentrations of combustion gases mixed with smoke particles in fire environments using terahertz spectroscopy. The results showed that the HCN concentrations obtained via terahertz spectroscopy were in good agreement with those obtained via FT-IR spectroscopy, indicating the potential of terahertz spectroscopy for rapid diagnosis of combustion gas flow concentrations in fire environments.
The development of a real-time measurement system to determine the concentrations of combustion gases mixed with smoke particles in fire environments is an essential technical issue in the fire safety field. In this study, the absorption line for the J = 8-7 rotational transition at 708.9 GHz of hydrogen cyanide (HCN) produced by the combustion of silk is rapidly measured in a 1 m cell during repeat scans (seven times a minute) via terahertz spectroscopy. The obtained time profile of HCN concentrations agrees well with the time profile obtained via Fourier transform infrared (FT-IR) spectroscopy. The maximum concentrations derived via terahertz spectroscopy are consistent with those derived via FT-IR within an accuracy of 10%. The minimum sensitivity of HCN is 100 ppm as detected via terahertz spectroscopy. The repetition rate, the accuracy, and the sensitivity for the scans demonstrate the potential of terahertz spectroscopy to rapidly diagnose combustion gas flow concentrations in fire environments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据