Preparation and characterization of carbon molecular sieve membranes based on resorcinol-formaldehyde resin

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Sandra C. Rodrigues (Author) FEUP; Adélio Mendes (Author) FEUP; Roger Whitley (Author) Other

Journal

Title: Journal of Membrane Science

Vol. 459

Pages: 207-216

ISSN: 0376-7388

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 23 Citations

ISI Web of Science

Scopus - 50 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Associated Projects

PTDC/EQU-EQU/114944/2009 - Desenvolvimento de um sistema autorregenerativo para a remoção de CO2 de sistemas anestésicos em circuito fechado

PTDC/EQU-EQU/104217/2008 - Integração de células de combustível de electrólito de membrana polimérica com membranas de paládio de elevada eficiência

Other information

Authenticus ID: P-009-7RE

DOI: 10.1016/j.memsci.2014.02.013

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).

Language: English

Type (Professor's evaluation): Scientific

Notes: Publicação abrangida pelo Journal Citation Reports 2015

No. of pages: 10