| 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 | |
| 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16 h。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。 | |
| 关键词: 高岭土 NaY分子筛 硅铝比 结晶度 Taguchi技术 | |
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| Abstract: 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/Al 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/Al ratio and larger surface area than the reference Y zeolite sample. | |
| Keywords: kaolinite NaY zeolite Si/Al ratio relative crystallinity taguchi technology | |
| 摘要点击次数: 1928 | |
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| 杨贵东,邢 伟,胡清勋,阎新龙,刘欣梅,阎子峰.利用Taguchi法以高岭土为原料制备高硅NaY分子筛(英文)[J].无机化学学报,2009,25(4):616-622. | |
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