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Organotemplate-free hydrothermal synthesis of SUZ-4 zeolite: influence of synthesis conditions
  • 期刊名称:Chinese Journal of Chemical Engineering
  • 时间:2014
  • 页码:120-126
  • 分类:TQ424.25[化学工程] O657.31[理学—分析化学;理学—化学]
  • 作者机构:[1]State Key Laboratory of Materials-Oriented Chemical Engineering, Collegeof Chemistry and Chemical Engineering,Nanjing University of Technology, Nanjing 210009, China, [2]Collegeof Sciences, Nanjing University of Technology, Nanjing 210009, China
  • 相关基金:Supported by the National lqatural Science Foundation of China (20976084, 21101094, 21136005).
  • 相关项目:基于硅源与金属离子弱酸共水解的蒸汽相转移法合成杂原子沸石分子筛
中文摘要:

各种各样的条件面对种子为 SUZ-4 沸石的新奇器官的没有模板的静态的热水的合成详细被调查。获得的样品被 XRD (X 光检查衍射) 描绘, SEM (扫描电子显微镜) , TG (热 gravimetric 分析) , ICP (诱导地联合的血浆) 元素的分析,氮吸着等温线和表面区域。结果证明有高 crystallinity 的纯 SUZ-4 沸石在合成条件的一扇宽广窗户中被获得:种子团集中0.2%2%, SiO2/Al2O3 臼齿的比率 2125 , KOH/SiO2 臼齿的比率 0.330.43 , H2O/SiO2 臼齿的比率 7.1438.1 ,老化时间 24 h ,结晶化温度 160 ?鎓???徬??薳????徬?鐿?醮鑖???銬薵?鎬???嚑??錿钩???鰿???铍??????徬颬???????蒠讬???鎖???鐿?醮鑖???额憰??????????鮺?鶬????鰿???鳓??飰鱎??鏒????徬??鞪?????钳??鬿??????嚑??鬿????鯤??螣?

英文摘要:

Various conditions were investigated in detail for the novel organic template-free static hydrothermal synthesis of SUZ-4 zeolite in the presence of seeds. The obtained samples were characterized by XRD (X-ray diffraction), SEM (scanning electron microscope), TG (thermal gravimetric analysis), ICP (inductively coupling plasma) elemental analysis, nitrogen sorption isotherm and surface area. The results show that pure SUZ-4 zeolites with high crystallinity are obtained in a broad window of synthesis conditions: seed mass concentration 0.2%-2%, SIO2/A1203 molar ratio 21 25, KOH/SiO2 molar ratio 0.33 0.43, H20/SiO2 molar ratio 7.14-38.1, aging time 24 h, crystallization temperature 160℃, and crystallization time 6-10 d. Also, crystallinity and size of the rod-like SUZ-4 zeolite crystals are found to alter with the conditions.

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