Hydrothermal stress test - Investigation on zeolite 13X and Al-fumarate for their application in open heat storage application

This paper presents the results of an approach for accelerated ageing of the well-known adsorbents zeolite 13X, shaped in binder-free granules, and Al-fumarate and the characterisation of the degradation mechanisms. The approximation of a temperature-dependent degradation function is applied based on the approach of van't Hoff, a simplified approach of Arrhenius. Due to unknown degradation mechanisms activation energies were assumed for e.g. ligand displacement and hydrolysis.