摘要
Nanosized SSZ-13 zeolite was synthesized by traditional hydrothermal method using N,N,N-trimethyl-l-adamantanaminium hydroxide as the structure-directing agent(SDA).The influence of different preparative conditions of nanosized SSZ-13 was investigated systematically.The synthetic zeolites were characterized by X-ray powder diffraction(XRD),nitrogen physisorption,and scanning electron microscopy(SEM).By means of the self-assembled method,the thin SSZ-1 3/polyvinyl alcohol nanocomposite membranes were obtained by incorporating the nanosized SSZ-1 3 zeolite into the polymeric precursor(polyvinyl alcohol(PVA)).The permeation properties of pure CO_2 and CH_4 through the mixed matrix membranes(MMMs)were measured.The results showed that the highly crystalline SSZ-13 zeolite in a dispersed nanocrystal form with a controllable particle size of 100 nm could be hydrothermally synthesized by optimizing the synthetic parameters and the selectivity of CO2/CH4 of the MMMs could reach a value of 40 by changing the amount of nanosized SSZ-13 zeolite.
Nanosized SSZ-13 zeolite was synthesized by traditional hydrothermal method using N,N,N-trimethyl-l-adamantanaminium hydroxide as the structure-directing agent(SDA).The influence of different preparative conditions of nanosized SSZ-13 was investigated systematically.The synthetic zeolites were characterized by X-ray powder diffraction(XRD),nitrogen physisorption,and scanning electron microscopy(SEM).By means of the self-assembled method,the thin SSZ-1 3/polyvinyl alcohol nanocomposite membranes were obtained by incorporating the nanosized SSZ-1 3 zeolite into the polymeric precursor(polyvinyl alcohol(PVA)).The permeation properties of pure CO_2 and CH_4 through the mixed matrix membranes(MMMs)were measured.The results showed that the highly crystalline SSZ-13 zeolite in a dispersed nanocrystal form with a controllable particle size of 100 nm could be hydrothermally synthesized by optimizing the synthetic parameters and the selectivity of CO2/CH4 of the MMMs could reach a value of 40 by changing the amount of nanosized SSZ-13 zeolite.
引文
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