TY - JOUR
T1 - Composite-alumina-carbon molecular sieve membranes prepared from novolac resin and boehmite. Part II
T2 - Effect of the carbonization temperature on the gas permeation properties
AU - Llosa Tanco, Margot A.
AU - Pacheco Tanaka, David A.
AU - Mendes, Adélio
N1 - Publisher Copyright:
© 2014 Hydrogen Energy Publications, LLC. All rights reserved.
PY - 2015/3/2
Y1 - 2015/3/2
N2 - 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.
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.
KW - Carbon membranes
KW - Gas separation
KW - Hydrogen separation
KW - Nanoparticles
KW - Novolac phenolic resin
UR - https://www.scopus.com/pages/publications/84922949102
U2 - 10.1016/j.ijhydene.2014.11.025
DO - 10.1016/j.ijhydene.2014.11.025
M3 - Article
AN - SCOPUS:84922949102
SN - 0360-3199
VL - 40
SP - 3485
EP - 3496
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 8
ER -
