不同活化方法对天然硅铝矿物活化及分子筛合成效果的影响  

Effects of activation methods on the activation of natural aluminosilicate minerals and zeolite synthesis

作　　者：刘海燕[1] 孙鑫艳 郑涛 刘植昌[1] LIU Hai-yan;SUN Xin-yan;ZHENG Tao;LIU Zhi-chang(College of Chemical Engineering and Environment,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油大学(北京)化学工程与环境学院,北京102249

出　　处：《燃料化学学报》2020年第3期328-337,I0005,共11页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21676297)资助。

摘　　要：选取了高岭土、累托土、蒙脱土和伊利石四种天然硅铝矿物,采用热活化、碱熔活化、亚熔盐活化及拟固相活化四种方法对上述四种矿物分别进行活化,对比了不同活化方法对天然硅铝矿物活化效果的影响。结果表明,亚熔盐活化及拟固相活化都具有良好的活化效果,而且能耗较低,明显优于热活化和碱熔活化。其中,拟固相活化由于能耗更低且更有利于实现工业操作,因此,是最具发展前景的天然硅铝矿物活化方法。对比四种天然硅铝矿物,高岭土、累托土及蒙脱土的晶相结构更容易被解聚,而伊利石稳定性更高,经亚熔盐活化及拟固相活化后,活化产物中也只有极少量的高反应活性的硅、铝物种,因此,伊利石不是理想的分子筛合成原料。Four natural aluminosilicate minerals including kaolin,rectorite,montmorillonite and illite were activated by thermal activation,alkali fusion activation,sub-molten salt activation and quasi-solid-phase activation method,respectively.Comparing the activation effects of the four methods,it is found that both sub-molten salt method and quasi-solid-phase method present better activation effect at lower energy consumption,which are obviously superior to the other two activation methods.The quasi-solid-phase activation method is the most promising method for activating the natural aluminosilicate minerals due to its much lower energy consumption and more feasible industrial operation.Comparatively,the framework structure of kaolinite rectorite and montmorillonite are relatively more easily to be depolymerized,the structure of illite is much stable,after being sub-molten salt activated and quasi-solid-phase activated,the resulted illite has little active SiO2 and Al2O3 which can be used to synthesize zeolites due to their high chemical reactivity.Therefore,different from the other three natural aluminosilicate minerals,illite is not an ideal raw material for zeolite synthesis.

关 键 词：硅铝矿物 热活化 碱熔活化 亚熔盐活化 拟固相活化 

分 类 号：TQ170.1[化学工程—硅酸盐工业]