利用Taguchi法以高岭土为原料制备高硅NaY分子筛(英文)  

Synthesis of High-Silica NaY Zeolite from Kaolin Based on Taguchi Technology

作　　者：杨贵东[1] 邢伟[2] 胡清勋[1] 阎新龙[1] 刘欣梅[1] 阎子峰[1] 

机构地区：[1]中国石油大学重质油国家重点实验室中国石油天然气集团公司催化重点实验室,山东青岛266555 [2]山东理工大学化学工程学院,山东淄博255049

出　　处：《无机化学学报》2009年第4期616-622,共7页Chinese Journal of Inorganic Chemistry

基　　金：中国石油天然气集团公司(No.07-03A-01-01-02-03);山东省自然科学基金(No.Y2006B38)资助项目

摘　　要：采用Taguchi试验方法优化出了以高岭土为原料制备高硅NaY分子筛的最佳合成参数,考察了硅溶胶的加入量、反应体系的碱度、加水量以及晶化时间对NaY分子筛硅铝比和结晶度的影响。结果表明,高硅NaY分子筛的最佳合成条件是:反应体系各组分的物质的量比为7.5SiO2:1.0Al2O3:2.2Na2O:120H2O,晶化时间为16h。同时发现,对合成样品性能的影响最为显著的因素是硅溶胶的加入量和碱度。采用X射线衍射、N2静态容量吸附法和扫描电镜对利用最佳条件所合成样品的硅铝比、比表面积、孔分布以及表观形貌进行了表征。结果显示,以高岭土原料制备的NaY分子筛比参考样品拥有更高的硅铝比和更大的比表面积。This paper reports a study of using Taguchi technology to find the optimum parameters for the synthesis of high-silica Y-zeolite from kaolinite. The effects of additional silica source, alkali, distilled water, and crystallization time on the synthesis of high Si/A1 zeolite Y were investigated. The results show that the dosage of additional silica source（silica sol） and alkali are the most influential factors on the synthesis of high-silica Y zeolite. The optimum preparation conditions are that the molar composition of sodium aluminosilicate gel is 7.5SiO2：1.0Al2O3：2.2Na2O：120H2O, and crystallization time is 16 h. The NaY zeolite synthesized at optimized conditions was characterized by X-ray diffraction （XRD）, N2 adsorption-desorption techniques and Scanning electron microscope （SEM）. The characterization results indicate that the sample has higher Si/A1 ratio and larger surface area than the reference Y zeolite sample.

关 键 词：高岭土 NAY分子筛 硅铝比 结晶度 Taguchi技术 

分 类 号：O643.362[理学—物理化学]