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以高岭土和硅藻土为原料原位晶化合成NaY分子筛
作者: mso-pagination:none"> mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes">程远坤 'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes">1 mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes">  'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes"> mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes">东 'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes">1 mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes"> 郑淑琴 'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes">2 mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes">  'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes"> mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes">华 'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes">3 mso-font-kerning:1.0pt mso-ascii-font-family:'TimesNewRoman' mso-hansi-font-family:'TimesNewRoman' mso-font-width:85% mso-no-proof:yes"> 唐课文 'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes">2 'serif' mso-fareast-font-family:仿宋_GB2312 mso-font-kerning:1.0pt mso-font-width:85% mso-no-proof:yes"> 
单位:1. 中南大学化学化工学院 长沙 410083 2. 湖南理工学院化学化工学院 湖南 岳阳 414000  
关键词:高岭土 硅藻土 原位晶化 分子筛 
分类号:TQ426.6
出版年,卷(期):页码:2012,40(8):1204-1209
DOI:
摘要:

摘  要:利用不同比例的高岭土和硅藻土为原料通过原位晶化方法合成出了结晶度较高的NaY分子筛,采用X射线衍射仪、扫描电子显微镜、N2吸附–脱附等测试手段对合成样品进行了表征。着重考察了m(高岭土):m(硅藻土)(质量比,下同)为6:4和2:8两种比例下,晶化合成体系中n(SiO2):n(Al2O3)(摩尔比,下同)、n(Na2O):n(SiO2)和n(H2O):n(Na2O)对原位晶化产物性能的影响。结果表明:在m(高岭土):m(硅藻土)为6:4的合成体系中,随n(SiO2):n(Al2O3)的增大,NaY分子筛的相对结晶度先增大后减小,增大体系的n(Na2O):n(SiO2)和减小n(H2O):n(Na2O)都有利于产品相对结晶度的提高;在m(高岭土):m(硅藻土)为2:8的合成体系中,增大n(SiO2):n(Al2O3),NaY分子筛的相对结晶度先增大后减小,但增大n(Na2O):n(SiO2)和减小n(H2O):n(Na2O),NaY分子筛的相对结晶度减小。

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Abstract: The microporous NaY zeolite was synthesized through in-situ crystallization using kaolin and diatomite in different proportions. The synthesized samples were characterized by X-ray diffraction, scanning electron microscope and N2 adsorption-desorption, respectively. The effect of different n(SiO2):n(Al2O3)(mole ratio), n(Na2O):n(SiO2) and n(H2O):n(Na2O) on the relative crystallinity of the NaY zeolite was investigated when m(kaolin):m(diatomite)(mass ratio) was 6:4 and 2:8. The results show that when m(kaolin):m(diatomite) is 6:4, the relative crystallinity of NaY zeolite firstly increases and then decreases with the increase of the n(SiO2):n(Al2O3). The increase of the n(Na2O):n(SiO2) and the decrease of n(H2O):n(Na2O) in the reaction system could favor the formation of NaY zeolite. When m(kaolin):m(diatomite) is 2:8, the relative crystallinity of NaY zeolite firstly increases and then decreases with increasing the n(SiO2):n(Al2O3). However, the relative crystallinity of NaY zeolite decreases with increasing the n(Na2O):n(SiO2) and decreasing the n(H2O):n(Na2O).

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基金项目:
国家自然科学基金(20871045);湖南省自然科学基金(11JJ- 2008);博士后基金(20110491240);湖南省科技计划重点资助项目(2010GK2020)。
作者简介:
第一作者:程远坤(1986—),男,硕士研究生。 通信作者:钱 东(1967—),男,博士,教授。
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参考文献:

参考文献:
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