The Studies on CO_2/N_2 Separation Performance of SSZ-13 Membranes

High-performance SSZ-13 membranes were synthesized using the combinative structure-directing agents by one hydrothermal treatment step with a gel composition of 1. 00 Si O2∶ 0. 10 Na2 O ∶ 0. 01 Al2O3∶ 0. 10 TMAda OH∶ 0. 10 BTMAOH∶ 80. 00 H2 O on macroporous tubular mullite supports. Membrane synthesis had a good reproducibility. The influences of temperature and pressure on the permeances of single CO2 and N2through SSZ-13 membranes were investigated. SSZ-13 membranes had average CO2 permeance of 1. 65 × 10- 7mol /( m2·s·Pa)with average CO2/ N2 selectivity of 16 at 303 K and 0. 2 MPa pressure drop for anequimolar CO2/ N2 mixture.