论文中文题名: | FSM-16介孔分子筛的合成与应用研究 |
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学号: | 06123 |
保密级别: | 公开 |
学科代码: | 081902 |
学科名称: | 矿物加工工程 |
学生类型: | 硕士 |
学位年度: | 2009 |
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专业: | |
第一导师姓名: | |
论文外文题名: | Studies on the Synthesis and Apply of Mesoporous Molecular Sieve FSM-16 |
论文中文关键词: | |
论文外文关键词: | Layered silicate Mesoporous molecular sieve FSM-16 Synthesis Modification |
论文中文摘要: |
介孔分子筛FSM-16具有比表面积高、孔道结构规则及孔径易调节、化学稳定性和热稳定性好、表面易改性等优点,在催化化学和吸附分离等领域都有很大的潜在应用前景。
本论文在合成FSM-16介孔分子筛之前首先制备了层硅酸钠,并由碘吸附及亚甲基蓝吸附确定了在700℃下煅烧18小时得到的层硅酸钠的吸附值最高。以十六烷基三甲基溴化铵为模板剂通过水热合成法在碱性条件下合成了结构性能优异的介孔分子筛FSM-16。通过分析各种因素对FSM-16介孔分子筛合成的影响,得出在合成过程中,合成混合液的摩尔配比为CTMA∶Na2Si2O5=0.2,70℃下搅拌3小时后调节溶液的pH值为8.5,继续反应3小时后,再经烘干、煅烧过程即可得到微观结构好,孔道规则排列,且长程有序性好的介孔分子筛FSM-16。通过X射线衍射(XRD)、傅立叶转换光谱(FT-IR)、扫描电镜(SEM)等测试方法对样品进行了表征,表明在该条件下所合成的样品具有规整有序的六方介孔孔道,孔径大小分布窄(2~3nm),为高质量的FSM-16介孔分子筛。
以Fe离子对FSM-16介孔分子筛进行改性,结果发现,引入Fe离子后仍可得到具有长程有序结构的FSM-16,并且随着Fe离子引入量的增加,分子筛的孔径逐渐变大。
以最优条件下合成的不同含Fe离子量的FSM-16介孔分子筛为催化剂,对含酚废水进行处理研究,结果发现当n(Fe)/n(Si)比为l/75时,对苯酚处理效果最好。
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论文外文摘要: |
With high specific surface area, ordered pore structure, facilely tailorable pore size, and fine chemical stability and thermostability, Mesoporous molecular sieve FSM-16 has wide application prospects in many fields, such as catalyst chemistry, adsorption and separation.
In this thesis, Kanemite was preparated before the synthesis of mesoporous molecular sieve FSM-16, the absorb data of kanemite calcinated 18h at 700℃ is tiptob through the adsorption of iodine and methylene blue. The mesoporous molecular sieve FSM-16,with good structure and performance was systhesized through hydrothermal treatment in alkaline medium by using cetyltrimethylammonium bromide as template. The key factors in the systhesis of mesoporous molecular FSM-16 slicitted that mesoporous molecular FSM-16, with good crystallization on degree and regular pore channels was systhesized when the molar ratio of the reaction mixture 1CTMA:0.2 Na2Si2O5 , after milling at 70℃ for 3 hours, adjust pH to 8.5, reacted 3 hours, then through drying and calcining,FSM-16 with best quality could be gotten. The materials were characterized by XRD, FT-IT and SEM etc. It turned out the sample possessed ordered hexagonal mesoporous channels and narrow pore distribution between 2~3nm.
Fe was intermingled and loaded in FSM-16. The results were showed: the higher ordered mesoporous structure was also showed by Fe-FSM-16,and the aperture of the molecular sieve was largen with the quantity of Fe oin.
Using the FSM-16 molecular sieve with different Fe ion systhesized at the most excellent condition as catalyzer to disposal the waste water contained hydroxybenzene. It indicated that the disposal phenol effect is best when the molar ratio is 1Fe: 75Si.
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中图分类号: | TQ426.61 |
开放日期: | 2010-03-19 |