Carbon Dioxide Raman Spectrum

Carbon dioxide (CO₂) is a colorless gas with a density approximately one and a half times higher than that of dry air. Its molecules consist of a carbon atom covalently double bonded to two oxygen atoms, and it occurs naturally in Earth's atmosphere as a trace gas. Since CO₂ is used extensively in all spheres of human activity, its excessive concentration can lead to various disasters. For this reason, it is absolutely vital to control air quality and detect CO₂ leaks. In this regard, it is of enormous benefit to science to have an online measurement tool for the CO₂ capture process as it can be used to optimize the process conditions.

Raman spectroscopy of CO₂

The CO₂ content in gases or liquids can be determined based on the CO₂ Raman spectrum, which makes Raman spectroscopy a powerful process analytical technology for CO₂ detection. The feasibility of its fast response, remote sampling, and water-insensitive spectral features render this technique a potential candidate for online applications in the CO₂ capture process.