Alumina-supported SAPO-34 membranes for CO2/CH4 separation.
SAPO-34 membranes were prepared by in situ crystallization on alpha-Al2O3 porous supports. The crystal size of the seeds was effectively controlled in the 0.7 to 8.5 micron range by employing different structure-directing agents. Seeds smaller than 1 micron produced membranes with CO2/CH4 separation selectivities higher than 170 and unprecedented CO2 permeances as high as 2.0 x 10(-6) mol/m2.s.Pa at 295 K and a feed pressure of 224 kPa. The membranes effectively separated CO2/CH4 mixtures up to 1.7 MPa.
Carreon
Moises A
MA
Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, USA.
Li
Shiguang
S
Falconer
John L
JL
Noble
Richard D
RD