FER zeolite crystallized in THF–Na2O–SiO2–Al2O3–H2O reactant system containing catalytic amount of organic additives
FER zeolite crystallized in THF–Na2O–SiO2–Al2O3–H2O reactant system containing catalytic amount of organic additives
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DOI：
10.1016/j.micromeso.2008.09.038
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发表时间：
2009-03
影响因子：
5.2
通讯作者：
Xiaowei Cheng;Jing Wang;Juan Guo;Heyong He;Yingcai Long
中科院分区：
文献类型：
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作者：
Xiaowei Cheng;Jing Wang;Juan Guo;Heyong He;Yingcai Long
以四氢呋喃（THF）为模板，在催化量的甘油[CH2(OH)CH(OH)CH2(OH)，GC]或OP乳化剂[C8H17-C6H5-O-(CH2CH2O)10OH，OP]存在下，在Na2O-SiO2-Al2O3-H2O反应体系中，在20℃温度范围内水热合成纯相FER沸石。 413–473K。采用粉末X射线衍射(XRD)观察结晶产物，并采用扫描电子显微镜(SEM)、13C交叉偏振(CP)和27Al魔角旋转(MAS)核磁共振(NMR)、X射线荧光散射光谱(XRF)、热分析和氮气吸附对合成的沸石进行表征。研究了催化量添加剂对沸石结晶的促进作用，抑制MOR沸石杂质共结晶，降低反应温度至413~433K，将413K结晶时间缩短至24h，改变所得沸石产物的形貌和吸附性能。并对催化量的有机添加剂的促进作用机理进行了探讨。
Pure-phase FER zeolite was hydrothermally synthesized in the reactant system of Na2O–SiO2–Al2O3–H2O with tetrahydrofuran (THF) as the template in the presence of catalytic amount of glycerol [CH2(OH)CH(OH)CH2(OH), GC] or OP emulsion agent [C8H17–C6H5–O–(CH2CH2O)10OH, OP] in the temperature range of 413–473K. Powder X-ray diffraction (XRD) was used to observe the crystallization products, and scanning electron microscope (SEM),13C cross polarization (CP) and27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR), X-ray fluorescence scattering spectroscopy (XRF), thermal analysis and nitrogen adsorption were used to characterize the synthesized zeolite. The promoting role of the catalytic amount of additives in the zeolite crystallization was investigated on the restraining co-crystallization of MOR zeolite impurity, lowering the reaction temperature to 413–433K, shortening the crystallization period to 24h at 413K, and modifying the morphology and the adsorption properties of the yielded zeolite products. The mechanism of the promoting role of the catalytic amount of organic additives is also discussed.