Non-Intrusive Hydrogen Measurement via Raman LIDAR

Hydrogen is highly relevant in power generation as both a clean fuel and a combustion byproduct, yet its high diffusivity, low ignition energy, and lacking visibility make it a significant safety concern in boiler operations. Traditional measurement methods like point sensors are limited by intrusive installation and restricted spatial coverage which reduce their effectiveness in large and dynamic environments like power plant boilers. This work presents a non-intrusive approach for hydrogen measurement in power plant boiler environment using Raman LIDAR. Raman LIDAR provides high spatial and temporal resolution offering possibility of continuous monitoring of status of gaseous species within the boilers. Both vibrational and rotational Raman scattering signals were evaluated as vibrational signals provide a distinct spectral fingerprint and the closely spaced rotational Raman signals enhance sensitivity and enable better discrimination from other combustion gases. The obtained results highlight the potential application of Raman LIDAR as a robust diagnostic tool for safer and more efficient boiler operation for broader integration of hydrogen into energy systems.