Application of Raman spectroscopy to real-time monitoring of CO2 capture at PACT pilot plant; Part 1: Plant operational data

•Raman spectroscopy is employed for real time monitoring of CO2 capture plant.•A multivariate regression model was used to determine rich and lean CO2 loadings.•Reliability of the Raman predictions are confirmed with the titration measurements.•The Raman predictions models are not affected with accelerated solvent degradation caused by high conc. of SO2.•It is demonstrated that the technology is a step closer towards predictive control of CO2 capture plants.