Synthesis and characterization of large, pure mordenite crystals
Synthesis and characterization of large, pure mordenite crystals
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大型纯丝光沸石晶体的合成和表征
DOI：
10.1007/s10934-011-9539-9
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发表时间：
2012-10
影响因子：
2.6
通讯作者：
W. D. Zhu
中科院分区：
文献类型：
--
作者：
C. H. Xu;Y. P. Guo;Q. Xiao;Y. J. Zhong;W. D. Zhu
以草酸粉末为硅源，水热法合成了大尺寸的丝光沸石（莫尔）晶体，并对合成的莫尔样品进行了XRD和SEM表征。系统研究了合成工艺参数，如所用草酸粉末的粒度、热处理温度以及合成液中SiO2/Al 2 O3摩尔比和碱度对莫尔晶体形成的影响。结果表明，由于采用大粒径的硅酸粉末或高温热处理，硅酸粉末溶解度低，导致生成不需要的α-SiO2相。此外，低的SiO2/Al 2 O3比和合成溶液中的高碱度可导致方沸石型（ANA）沸石的形成。在高SiO2/Al 2 O3比和低碱度的合成溶液中，使用具有细颗粒尺寸的硼酸粉末作为硅源，不经热预处理，可以水热合成具有均匀尺寸和形状的大的、纯的棱柱状莫尔晶体。合成的莫尔晶体经酸处理后，其可接近性显著提高。
Large, pure mordenite (MOR) crystals were synthesized hydrothermally using silicic acid powder as the silica source, and the synthesized MOR samples were characterized by XRD and SEM techniques. The effects of several synthesis parameters, such as particle size and heat pre-treatment temperature of the used silicic acid powder as well as SiO2/Al2O3molar ratio and alkalinity in the synthesis solution, on the formation of MOR crystals were systematically investigated. The results indicate that the low solubility of the silicic acid powder, resulting from the use of the powder with large particle sizes or its heat pre-treatment at high temperatures, leads to the formation of unwantedα-SiO2phase. Additionally, a low ratio of SiO2to Al2O3and a high alkalinity in the synthesis solution can result in the formation of analcime-type (ANA) zeolite. Large, pure prismatic MOR crystals with uniform size and shape can be synthesized hydrothermally at a high ratio of SiO2to Al2O3and a low alkalinity in the synthesis solution using silicic acid powder with fine particle sizes without heat pre-treatment as the silica source. The synthesized MOR crystals with acid treatment can significantly enhance their micropore accessibility.
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影响因子：
5.2
作者：
D. Lozano‐Castelló;Weidong Zhu;Á. Linares-Solano;F. Kapteijn;J. Moulijn
通讯作者：
D. Lozano‐Castelló;Weidong Zhu;Á. Linares-Solano;F. Kapteijn;J. Moulijn
影响因子：
5.2
作者：
T. Sano;S. Wakabayashi;Y. Oumi;T. Uozumi
通讯作者：
T. Sano;S. Wakabayashi;Y. Oumi;T. Uozumi
DOI：
10.1021/i360067a009
发表时间：
1978-02
期刊：
Industrial & Engineering Chemistry Product Research and Development
影响因子：
--
作者：
P. Bajpai;M. S. Rao;K. Gokhale
通讯作者：
P. Bajpai;M. S. Rao;K. Gokhale
影响因子：
3
作者：
C. Shao;H. Kim;Xiangdan Li;Soojin Park;Duck-Rae Lee
通讯作者：
C. Shao;H. Kim;Xiangdan Li;Soojin Park;Duck-Rae Lee
影响因子：
15
作者：
C. E. Webster;A. Cottone;R. Drago
通讯作者：
C. E. Webster;A. Cottone;R. Drago