Synthesis of Potassium Ionic Sieve Membrane and its Selectivity to Potassium Ion in Seawater
Potassium ionic sieve membrane was synthesized on porous α-Al2O3 tube support by the hydrothermal synthesis. The zeolite membranes were characterized by means of XRD and SEM. And the single-gas permeability through the membranes and selectivity to K+, Na+, Ca2+, Mg2+ were measured. The results show that the ideal separation factor is 3.68, which is close to Knudsen diffusion ratio 3.74 for H2/N2; the separation factors of the potassium ionic sieve membrane are , , respectively, indicating its high separation selectivity to potassium ion.
Jinsheng Liang and Lijuan Wang
J. S. Yuan et al., "Synthesis of Potassium Ionic Sieve Membrane and its Selectivity to Potassium Ion in Seawater", Advanced Materials Research, Vol. 178, pp. 300-307, 2011