催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (12): 1197-1202.

• 研究论文 • 上一篇    下一篇

介孔丝光沸石的制备及其对重芳烃转化反应的催化性能

祁晓岚, 陈雪梅, 孔德金, 郑均林, 袁晓红, 杨德琴   

  1. 中国石油化工股份有限公司上海石油化工研究院, 上海 201208
  • 收稿日期:2009-12-25 出版日期:2009-12-25 发布日期:2013-09-29

Preparation of Mesoporous Mordenite and Its Catalytic Performance for Transformation of Heavy Aromatics

QI Xiaolan, CHEN Xuemei, KONG Dejin*, ZHENG Junlin, YUAN Xiaohong, YANG Deqin   

  1. Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
  • Received:2009-12-25 Online:2009-12-25 Published:2013-09-29

PDF

1181

被引次数

46

摘要： 用不同浓度的 NaOH 溶液对丝光沸石进行处理制备了具有复合孔道结构的介孔丝光沸石, 并采用 X 射线衍射、扫描电子显微镜、透射电子显微镜和 N2 吸附-脱附等方法对其进行了表征. 结果表明, 随着 NaOH 溶液浓度的升高, 介孔丝光沸石的粒径逐渐变小, 分子筛表面的介孔逐渐丰富, 孔径分布逐渐变宽, 介孔体积逐渐增大呈线性关系. 当 NaOH 浓度为 0.50 mol/L 时, 介孔丝光沸石的形貌变为空心沸石微囊或微囊壁. 介孔的增加产生扩散效应, 适当的 NaOH 溶液处理有利于提高丝光沸石对 C9 和 C10 芳烃的转化能力.

关键词: 丝光沸石, 碱处理, 介孔, 孔径分布, 重芳烃

Abstract: Mesoporous mordenite samples were prepared by treatment in NaOH solution with different concentrations. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and N2 adsorption-desorption methods. The NaOH concentration had a great impact on physicochemical properties of the mesoporous mordenite. With the increase in NaOH concentration, the particle size of the mesoporous mordenite became smaller, the amount of derived mesopores increased, the pore size distribution became broader, and the volume of mesopores increased in a linear manner. When the NaOH concentration was 0.50 mol/L, the mesoporous mordenite became zeolite microbox-like architecture and its fragments. The mordenite after alkaline treatment had much better catalytic performance for transformation of C9 and C10 aromatics to benzene, toluene, and xylene.

Key words: mordenite, alkaline treatment, mesopore, pore size distribution, heavy aromatics