Online monitoring of dissolved CO2 and MEA concentrations: Effect of solvent degradation on predictive accuracy

摘要

Concentrations of dissolved CO2 and mono-ethanolamine (MEA) are two essential properties of common CO2 absorption processes. They can be predicted accurately and continuously using a combination of inline measurements and a multivariate model, also in the presence of various solvent degradation products. Including expected pollutants in the model calibration generally improves the prediction accuracy for polluted solvent samples originating from an industrial pilot plant. Compared to a model based on unpolluted samples, the obtained predictions are worse. However, they are still around 2-3 [%] of the measurement ranges, which makes them useful for real-time process monitoring and control.