RT Journal Article
T1 Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: 												Effect of the carbonization temperature on the gas permeation properties
A1 Llosa Tanco, Margot A.
A1 Pacheco Tanaka, David A.
A1 Mendes, Adélio
AB The influence of carbonization temperature on the permeation properties and aging of thin (4 μm) supported carbon molecular sieve membranes (c-CMSM), prepared from in house synthesized novolac phenolic resin loaded with boehmite nanoparticles, were studied. Just after membrane carbonization (fresh membrane), high permeance to N2 and O2 and low O2/N2 permselectivities were observed; the highest permeations were observed for carbonization end temperatures between 500 °C and 700 °C. After leaving the c-CMSM 1 day in the air, a large decrease in the permeation and considerable increase in the permselectivity were observed due to the reduction of the pore size by oxygen chemisorption and water physical adsorption; the permeability to H2 and H2/N2 ideal permselectivity for a membrane carbonized at 550 °C are close to palladium membranes for low temperature (<100 °C). The effect of the permeation characteristics of the membranes carbonized at various temperatures and the removal of water adsorbed in the pores by heat treatment were studied.
SN 0360-3199
YR 2015
FD 2015-03-02
LA eng
NO Llosa Tanco , M A , Pacheco Tanaka , D A & Mendes , A 2015 , ' Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II : Effect of the carbonization temperature on the gas permeation properties ' , International Journal of Hydrogen Energy , vol. 40 , no. 8 , pp. 3485-3496 . https://doi.org/10.1016/j.ijhydene.2014.11.025
NO Publisher Copyright: © 2014 Hydrogen Energy Publications, LLC. All rights reserved.
NO Margot Llosa Tanco is grateful to the Portuguese Foundation for Science and Technology (FCT) for her doctoral grant (reference SFRH/BD/61898/2009 ). The authors would like to acknowledge to Sandra C. Rodrigues (doctoral grant reference SFRH/BD/90208/2012 ) for performing the CO 2 adsorption measurements at LEPABE and FCT research project PTDC/EQU-EQU/114944/2009 . The authors are also thankful to CEMUP for the SEM analysis ( REEQ/1062/CTM/2005 and REDE/1512/RME/2005 funding provided by FCT).
DS TECNALIA Publications
RD 1 jul 2024