Synthesis of Nanosized SSZ-13 Zeolite and Performance of Its Mixed Matrix Membrane for CO₂/CH₄ Separation

【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 CO₂ and CH₄ 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.更多还原

【Abstract】 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 CO₂ and CH₄ 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.更多还原