Aluminophosphate monoliths with high CO2-over-N2 selectivity and CO2 capture capacity
2014 (English)In: RSC Advances, ISSN 2046-2069, Vol. 4, no 99, 55877-55883 p.Article in journal (Refereed) Published
Monoliths of microporous aluminophosphates (AlPO4-17 and AlPO4-53) were structured by binder-freepulsed current processing. Such monoliths could be important for carbon capture from flue gas. TheAlPO4-17 and AlPO4-53 monoliths exhibited a tensile strength of 1.0 MPa and a CO2 adsorption capacityof 2.5 mmol g1 and 1.6 mmol g1, respectively at 101 kPa and 0 C. Analyses of single component CO2and N2 adsorption data indicated that the AlPO4-53 monoliths had an extraordinarily high CO2-over-N2selectivity from a binary gas mixture of 15 mol% CO2 and 85 mol% N2. The estimated CO2 capturecapacity of AlPO4-17 and AlPO4-53 monoliths in a typical pressure swing adsorption (PSA) process at 20C was higher than that of the commonly used zeolite 13X granules. Under cyclic sorption conditions,AlPO4-17 and AlPO4-53 monoliths were regenerated by lowering the pressure of CO2. Regeneration wasdone without application of heat, which would regenerate them to their full capacity for CO2 adsorption.
Place, publisher, year, edition, pages
2014. Vol. 4, no 99, 55877-55883 p.
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-109022DOI: 10.1039/c4ra05009fISI: 000344997800024OAI: oai:DiVA.org:su-109022DiVA: diva2:761972