Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II: Effect of the carbonization temperature on the gas permeation properties
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2015-03-02
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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.
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Publisher Copyright: © 2014 Hydrogen Energy Publications, LLC. All rights reserved.
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Carbon membranes , Gas separation , Hydrogen separation , Nanoparticles , Novolac phenolic resin , Carbon membranes , Gas separation , Nanoparticles , Novolac phenolic resin , Hydrogen separation , Renewable Energy, Sustainability and the Environment , Fuel Technology , Condensed Matter Physics , Energy Engineering and Power Technology , SDG 7 - Affordable and Clean Energy , Funding Info , Portuguese Foundation for Science and Technology (FCT) , Portuguese Foundation for Science and Technology (FCT)
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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