Simultaneous pressure and temperature single-crystal X-ray diffraction experiments were conducted on laumontite and heulandite to study how temperature affects pressure-mediated H2O adsorption in zeolites, when compressed in acqueos fluids. The combined PT conditions initially enhance the H2O uptake in leonhardite at T = 100 °C, with rapid volume expansion below 5 kbar and adsorption kinetics markedly faster than at ambient conditions. Heulandite shows higher H₂O incorporation than previously reported under identical fluid conditions. Ongoing refinements will resolve the PT-driven redistribution of extra-framework species
THE ROLE OF TEMPERATURE ON THE PRESSURE-MEDIATED ADSORPTION IN NATURAL ZEOLITES: THE CASE OF LAUMONTITE AND HEULANDITE / D. Comboni, P. Lotti, G.D. Gatta, L. Chiappella, S. Gemelli, G. Garbarino. 10. Conference of the Federation of the European Zeolite Associations (FEZA) Napoli 2026.
THE ROLE OF TEMPERATURE ON THE PRESSURE-MEDIATED ADSORPTION IN NATURAL ZEOLITES: THE CASE OF LAUMONTITE AND HEULANDITE
D. Comboni
;P. Lotti;G.D. Gatta;
2026
Abstract
Simultaneous pressure and temperature single-crystal X-ray diffraction experiments were conducted on laumontite and heulandite to study how temperature affects pressure-mediated H2O adsorption in zeolites, when compressed in acqueos fluids. The combined PT conditions initially enhance the H2O uptake in leonhardite at T = 100 °C, with rapid volume expansion below 5 kbar and adsorption kinetics markedly faster than at ambient conditions. Heulandite shows higher H₂O incorporation than previously reported under identical fluid conditions. Ongoing refinements will resolve the PT-driven redistribution of extra-framework species
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