| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 642908 | Separation and Purification Technology | 2010 | 6 Pages |
In this research, a triethylene glycol (TEG)/nano-zeolite Na-Y liquid membrane was developed in order to investigate the effect of zeolite nanoparticles on separation performance of a liquid membrane. To do this, a high yield nano-zeolite Na-Y was synthesized using mid-synthesis addition method. The synthesized samples were characterized by XRD, FT-IR, and SEM (EDX) instrumental techniques. A supported liquid membrane was prepared by impregnating a porous hydrophilic PVDF support with TEG and nano-zeolite Na-Y. The permeation tests of single gas components of O2, N2 and CO2 were carried out at pressure differences of 0.8 and 1.8 bar. The permeances of the single gases were found to be: CO2 > N2 > O2. Our results showed that higher loading of nano-zeolite Na-Y in TEG and higher pressure differences enhanced the permeation of CO2 in comparison with N2 and O2. Also, these two factors improved the selectivity of CO2/O2 and CO2/N2 separation, but did not change N2/O2 separation.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Nano-zeolite Na-Y was synthesized using mid-synthesis addition method. The samples of zeolite were analyzed by XRD, FT-IR, and EDX, which proved the formation of nano-zeolite Na-Y. ▶ A supported liquid membrane was prepared by impregnation a porous PVDF (polyvinylidene fluoride) membrane with TEG and nano-zeolite Na-Y. ▶ The prepared liquid membrane was investigated as a function of zeolite loadings (5% and 10% weight fraction of nano-zeolite and TEG solvent) and pressure differences (0.8 and 1.8 bar) through O2, N2 and CO2 permeation tests. ▶ Single gas permeation tests of CO2, N2 and O2 showed that higher pressure differences and higher zeolite loadings give more permeability of CO2 when compared with N2 and O2. ▶ Higher pressure differences and zeolite loadings improved the selectivity of CO2/O2 and CO2/N2 separation, but did not change N2/O2 selectivity.
