title: Retention of gases by hexadecyltrimethylammonium-montmorillonite clays.
abstract: Intercalated montmorillonite clays with different amounts of organic hexadecyltrimethylammonium (HDTMA) cations were studied to analyse their CO, CH(4), and SO(2) gas retentions. Equilibrium adsorption was measured by using a standard volumetric apparatus at 25 degrees C and 0.1 MPa. The solids were characterised by X-ray diffraction. The levels of adsorption of SO(2) by organo-montmorillonites (0.3595-1.6403 mmol/g) were higher than those of CO (up to 0.0202 mmol/g) and CH(4) (up to 0.0273 mmol/g) gases. HDTMA montmorillonites may be effective adsorbents for removing SO(2) and for its potential separation in the presence of CO and/or CH(4) molecules, which can be present in contaminated air.
authors.affiliation: Centro de Tecnología de Recursos Minerales y Cerámica (CETMIC), CONICET-CIC, C.C. 49, Cno. Centenario y 506, 1897 M. B. Gonnet, Argentina. volzcris@netverk.com.ar
authors.forename: C
authors.initials: C
authors.lastname: Volzone
authors.forename: J O
authors.initials: JO
authors.lastname: Rinaldi
authors.forename: J
authors.initials: J
authors.lastname: Ortiga
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D001546:Bentonite / Q000737:chemistry*; D002593:Cetrimonium Compounds / Q000737:chemistry*; D000077215:Clay; D014961:X-Ray Diffraction
chemical_list: D000538:Aluminum Silicates; D002593:Cetrimonium Compounds; D001546:Bentonite; D000077215:Clay