The effect of biomass ashes and potassium salts on MEA degradation for BECCS

This study investigates the comparative impact of inherently different biomass and coal ashes on laboratory pilot scale degradation 30 wt% aqueous monoethanolamine (MEA), relevant to post-combustion CO2 capture. Thermal oxidative experiments were carried out at 135 °C 40 respectively with loading (0.5 molCO2/molMEA), without presence ash. Nuclear magnetic resonance (NMR) data is provided for major MEA compounds such as N-(2-hydroxyethyl)formamide (HEF) N-(2-hydroxyethyl)imidazole (HEI) along characterisation a new product, N-(2-hydroxyethyl)imidazole-N-oxide (HEINO) which had been previously misassigned. Degradation products quantified using 1H NMR gas chromatography mass spectrometry (GC–MS) assess potassium various from combustion (olive, white wood two types ash) rates amine degradation. Woody fly found reduce products. Both ash olive enhance formation newly identified HEINO. Solvent samples taken facility support these findings.