基于亚熔盐介质的天然黏土矿物活化机理的研究

以天然黏土矿物为原料合成分子筛的首要条件是将天然矿物中的硅铝物种充分活化使之解聚成为具有高化学反应活性的物种。与传统的活化方法相比，亚熔盐介质可以在较低温度下实现天然黏土矿物的高效活化，且以天然黏土的亚熔盐活化产物为原料可以成功制备性能优异的分子筛材料，然而有关亚熔盐活化天然黏土矿物的机理目前尚不清楚。本项目拟通过对天然黏土矿物在亚熔盐介质中活化过程的系统研究，综合应用热力学和动力学方法，结合活化过程的原位表征、活化产物及以活化产物为原料合成的分子筛产品的物理化学性质分析，揭示天然黏土矿物在亚熔盐介质中的活化机理及活化过程对分子筛合成过程的影响，为发展高效、低能耗的天然矿物活化新方法提供理论支撑。

The key to success in synthesizing zeolites or zeolitic materials directly from natural aluminosilicate minerals is their effective avtivation, because most natural aluminosilicate minerals are intrinsically inert in their natural state. Compared with the conventional activation approaches, the silicon and aluminum species in the natural minerals can be activated efficiently via a submolten salt (SMS) based method under the lower activation temperature and the zeolites with superior performance can also be successfully synthesized using the SMS activated minerals as starting materials. However, the mechanism of the SMS activation process of the natural minerals is not clear. Therefore, this proposal aims at uncovering the activation mechanism of the natural aluminosilicate minerals in the SMS medium and the inpacts of the activation process on the synthesis process of zeolites through systematically investigating the activation behavior of the natural minerals in the SMS activation process by utilizing the thermodynamics and kinetics technique, in-situ characterization and analyzing the pyhsicochemical properties of the SMS activated minerals and the zeolites synthesized from the SMS activated minerals. It is believed that this work will serve as a theoretical support for developing the novel method to effectively activate natural minerals.