title: Acid natural clinoptilolite: structural properties against adsorption/separation of n-paraffins.
abstract: The employment of an acid natural clinoptilolite (AZH-1) in the adsorption and separation of n-paraffins has been evaluated. Natural clinoptilolite, NZ, was the raw material used to prepare the sodium-exchanged clinoptilolite (AZ) starting from which the AZH-1 sample was obtained by acid treatment. The structural stability of the samples after the applied treatments was demonstrated. The nitrogen adsorption experiments indicated that the acid sample has a homogeneous porous distribution and a considerable increase in the micropore volume with respect to NZ and AZ. The employment of the inverse gas chromatography at infinite dilution (IGCID) allowed studying the adsorption and separation of n-paraffin mixtures on AZH-1. It was also confirmed that the diffusion on AZH-1 took place in an unblocked structure through the A channel of ten members with minimal interactions. The IGCID results demonstrated the capacities of the acid Cuban natural zeolite in the adsorption and separation of n-paraffin mixtures.
authors.affiliation: Zeolites Engineering Laboratory, Institute of Materials Science and Technology (IMRE), University of Havana, Havana, Cuba. aramis@fisica.uh.cu
authors.forename: Aramis
authors.initials: A
authors.lastname: Rivera
authors.forename: Tania
authors.initials: T
authors.lastname: Farías
authors.forename: Louis Charles
authors.initials: LC
authors.lastname: de Ménorval
authors.forename: Giselle
authors.initials: G
authors.lastname: Autié-Castro
authors.forename: Hernany
authors.initials: H
authors.lastname: Yee-Madeira
authors.forename: José Luis
authors.initials: JL
authors.lastname: Contreras
authors.forename: Miguel
authors.initials: M
authors.lastname: Autié-Pérez
mesh_terms: D000327:Adsorption; D002627:Chemistry, Physical; D015394:Molecular Structure; D010232:Paraffin / Q000737:chemistry*; D013499:Surface Properties; D017641:Zeolites / Q000737:chemistry*
chemical_list: C083175:clinoptilolite; D017641:Zeolites; D010232:Paraffin