Crystallization under the influence of flotation: new synthesis routes for self-supported zeolite membranes

本项目的重点是开发合成微孔自支撑沸石膜的新技术。我们最近的合成利用工业硅烷生产中的纳米晶过滤器残渣作为硅酸盐源。这些尝试成功地形成了自支撑的SOD、LTA、SOD- ltn和LTA- fau膜。其他研究结果对未来通过Na+OH-离子对和H2O分子的动态交换以及避免碳酸盐包合的结果对SOD膜的改进具有重要意义。初步的结果导致了进一步的基础科学问题，即(1)提高膜密度和(2)研究商业上可用的硅酸盐源代替过滤残渣的利用潜力。关于问题(1)和(2)的实验将成为最终研究的主题，这将为新的自支撑沸石膜合成技术提供进一步的必要见解。

The present project focuses on the development of novel techniques for the synthesis of microporous self-supported zeolite membranes. Our recent syntheses utilize a nanocrystalline filer residue from industrial silane production, serving as silicate source. These attempts successfully led to the formation of self-supported SOD, LTA, SOD-LTN and LTA-FAU membranes. Additional findings provide high significance for future improvement of SOD membranes by dynamic exchange of Na+OH- ion pairs and H2O molecules, and by results concerning the avoidance of carbonate enclathration. The preliminary results lead to further fundamental scientific issues, namely (1) an improvement of the membrane density and (2) investigating the utilization potential of commercially available silicate sources instead of the filter residue. Experiments with respect to the issues (1) and (2) are intended to be the subject of final investigations, which will provide further necessary insights into the novel synthesis technique of self-supported zeolite membranes.