Study on Hydrogen Fluoride at High Temperature Detection Method with Temperature Correction Based on Laser...

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Environmental Science

Background:

• Hydrogen fluoride (HF) is a critical indicator gas for fault diagnosis in gas insulation switch (GIS) systems.
• Accurate, fast, and real-time detection of HF is essential for industrial and environmental monitoring.

Purpose of the Study:

• To develop and validate a high-accuracy, real-time HF detection method using laser absorption spectroscopy.
• To design a concentration inversion algorithm incorporating temperature correction for enhanced accuracy.

Main Methods:

• Established an HF detection experimental system using laser absorption spectroscopy and an anti-corrosion multiple reflection cell.
• Analyzed HF spectral characteristics at various temperatures and studied spectral data from the HITRAN database.
• Developed a concentration inversion algorithm with HF spectrum analysis and temperature parameter correction.

Main Results:

• Temperature correction reduced HF concentration inversion errors from over 5% to approximately 1.5% at elevated temperatures (313-323 K).
• The detection limit was determined to be 8.7×10⁻⁵ mmol·mol⁻¹ at 323 K, comparable to room temperature detection.
• The developed method demonstrated stable and reliable performance, with corrected high-temperature errors lower than uncorrected room-temperature errors.

Conclusions:

• The laser absorption spectroscopy method with a temperature-corrected concentration inversion algorithm provides a stable and reliable means for HF detection.
• This technology meets the demand for real-time HF monitoring in chemical production and supports environmental gas emission regulation.