Chemical characterisation of metakaolin and fly ash based geopolymers during exposure to solvents used in carbon capture

Abstract

This paper presents an investigation into the chemical resistance of blended alkali activated aluminosilicate materials, specifically under exposure to two solvents used in post-combustion carbon capture, monoethanolamine (MEA) and potassium carbonate, as well as during immersion in distilled water. Geopolymers are formulated based on metakaolin and aon fly ash as aluminosilicate precursors, with the addition of ground granulated blast furnace slag (GGBFS) as a source of Ca. The samples are subjected to mineralogical and chemical characterisation in this paper, with data obtained through leaching analysis and X-ray diffraction, supported by compressive strength data. Exposure to solvents gen..