共生沸石MFI/MOR和BEA/MOR合成与介孔改性

被引：0

作者：

王洪涛 ^{[1
]}

韩静宇 ^{[1
]}

张莉 ^{[1
]}

李萍 ^{[1
]}

金英杰 ^{[1
]}

机构：

[1] 辽宁石油化工大学化学化工与环境学部

来源：

石油化工高等学校学报 | 2017年 / 30卷 / 01期

关键词：

水热合成; 共生沸石; 相组成; 介孔改性; 多级孔结构;

D O I：

暂无

中图分类号：

TQ424.25 [用作吸附剂的人造硅酸盐];

学科分类号：

0817 ;

摘要：

采用晶种诱导法合成相组成接近的MFI/MOR和BEA/MOR共生沸石;用碱-酸联合处理法对共生沸石进行介孔改性。用X-射线衍射(XRD)、N2吸附-脱附、扫描/透射电镜(SEM/TEM)和感应耦合等离子体光谱(ICP-AES)表征合成和改性材料的组成和结构。结果表明,共生沸石骨架硅铝物质的量比和相组成受合成胶硅铝物质的量比和晶化条件(温度、时间、pH)的影响;改性共生沸石均为结晶性多级孔材料,其中BEA/MOR(t)具有较窄介孔尺度分布。孔结构性质和相组成变化与所含沸石相的结构稳定性密切相关。初级晶粒较小、骨架稳定性较低的沸石相优先被溶蚀,MFI和BEA质量分数下降,改性沸石骨架硅铝物质的量比因酸洗而提高。

引用

页码：8 / 13 +35

页数：7

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