Título: Journal of Membrane ScienceImportada do Authenticus Pesquisar Publicações da Revista

Vol. 459

Páginas: 207-216

ISSN: 0376-7388

Editora: Elsevier

ISI Web of Knowledge - 23 Citações

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INSPEC

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

ID Authenticus: P-009-7RE

DOI: 10.1016/j.memsci.2014.02.013

Resumo (PT):

Abstract (EN): Carbon molecular sieve membranes (CMSM) were prepared on α-alumina supports by carbonization of a resorcinol–formaldehyde resin loaded with boehmite. Two series of carbon membranes produced at 500 1C and 550 1C carbonization end temperatures were prepared. The influence of the carbonization end temperature on the structure, morphology and performance of the membranes was examined by scanning electron microscopy, thermogravimetric analysis, CO2 adsorption and permeation to N2, O2, He, H2 and CO2 at temperatures from 25 1C to 120 1C. SEM photographs showed carbon membranes with a thin and very uniform layer and a thickness of ca. 3 mm. Carbon dioxide adsorption isotherms revealed that all the produced carbon membranes have a well-developed microporous structure. Nevertheless, the membranes carbonized at 550 1C have more ultramicropores and a narrower pore size distribution. The permselectivity of CMSM prepared at this temperature surpasses the Robeson upper bound for polymeric membranes, especially regarding ideal selectivities of pairs O2/N2 (O2 permeation rate: 9.85
1010 mol m2 s1 Pa1 and ideal selectivity: 411.5), H2/N2 (H2 permeation rate: 5.04
108 mol m2 s1 Pa1 and ideal selectivity: 4586) and He/N2 (He permeation rate: 4.68
108 mol m2 s1 Pa1 and ideal selectivity: 4544).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: Publicação abrangida pelo Journal Citation Reports 2015

Nº de páginas: 10