title: Calorimetry by immersion into liquid nitrogen and liquid argon: a better way to determine the internal surface area of micropores.
abstract: The aim of this work is to assess the internal surface area of a set of samples (either carbons or oxides, either porous or nonporous, either microporous or mesoporous) by microcalorimetry via immersion into liquid nitrogen or argon. We have made use of an isothermal, heat-flux microcalorimeter, initially designed and built in our laboratory for the sake of gas adsorption experiments at 77 or 87 K. It seems that immersion calorimetry into liquid nitrogen and argon makes it possible to go one step further in the determination of the internal surface area of micropores.
authors.affiliation: Departamento de Química Inorgánica y Química Técnica (U.N.E.D) Senda del Rey s/n, Madrid, Spain. rncasas@ugr.com
authors.forename: Ricardo
authors.initials: R
authors.lastname: Navarrete
authors.forename: Philip
authors.initials: P
authors.lastname: Llewellyn
authors.forename: Françoise
authors.initials: F
authors.lastname: Rouquerol
authors.forename: Renaud
authors.initials: R
authors.lastname: Denoyel
authors.forename: Jean
authors.initials: J
authors.lastname: Rouquerol
mesh_terms: D001128:Argon / Q000737:chemistry*; D002151:Calorimetry / Q000295:instrumentation / Q000379:methods; D007101:Immersion; D009584:Nitrogen / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D013696:Temperature; D013816:Thermodynamics
chemical_list: D001128:Argon; D009584:Nitrogen