Characterization of Carbon Molecular Sieve Membranes Supported on Ceramic Tubes


Autoria(s): Briceño, Kelly; Silvestre-Albero, Joaquín; Silvestre Albero, Ana; Calvo Díaz, José Ignacio; Montané, Daniel; Garcia-Valls, Ricard; Hernández Giménez, Antonio; Rodríguez Reinoso, Francisco
Contribuinte(s)

Universidad de Alicante. Departamento de Química Inorgánica

Universidad de Alicante. Instituto Universitario de Materiales

Materiales Avanzados

Data(s)

26/11/2014

26/11/2014

01/03/2013

Resumo

Carbon molecular sieve membranes have been analyzed in supported and unsupported configurations in this experimental study. The membranes were used to adsorb CO2, N2 and CH4, and their adsorption data were analyzed to establish differences in rate and capacity of adsorption between the two types of samples (supported and unsupported). Experimental results show an important effect of the support, which can be considered as an additional parameter to tailor pore size on these carbon membranes. Immersion calorimetry values were measured by immersing the membranes into liquids of different molecular dimensions (dichloromethane, benzene, n-hexane, 2,2-dimethylbutane). Similarities were found between adsorption and calorimetric analysis. The pore volume of the samples analyzed ranged from 0.016 to 0.263 cm3/g. The effect of the pyrolysis temperature, either 550 or 700 °C, under N2 atmosphere was also analyzed. Quantification of the pore-size distribution of the support was done by liquid-liquid displacement porosimetry. The composite membrane was used for CO2/CH4 separation before and after pore plugging was done. The ideal selectivity factors value (4.47) was over the Knudsen theoretical factor (0.60) for membrane pyrolyzed at 600 °C, which indicates the potential application of these membranes for the separation of low-molecular weight gases.

The authors are indebted to the Spanish Government for financial support (Project CTQ2008-02491, partially funded by the FEDER program of the European Union) and to the commission of European Communities Specific OpenTok Project MTKD-LT-2005-030040.

Identificador

Adsorption Science & Technology. 2013, 31(2-3): 233-247. doi:10.1260/0263-6174.31.2-3.233

0263-6174 (Print)

2048-4038 (Online)

http://hdl.handle.net/10045/42761

10.1260/0263-6174.31.2-3.233

Idioma(s)

eng

Publicador

Multi Science Publishing

Relação

http://dx.doi.org/10.1260/0263-6174.31.2-3.233

Direitos

© Multi-Science Publishing

info:eu-repo/semantics/openAccess

Palavras-Chave #Carbon molecular sieve membranes #Ceramic tubes #Química Inorgánica
Tipo

info:eu-repo/semantics/article