炭黑/P123双重模板体系原位组装梯度孔材料  

Synthesis of hydrothermally stable composites with graded pores via in-situ assembly of zeolite Y precursors by carbon black/P123 dual templates

作　　者：崔匀[1] 刘洪涛[1] 金君素[2] 徐春艳[1] 张泽廷[2] 

机构地区：[1]北京化工大学理学院现代催化研究所 [2]北京化工大学化学工程学院,北京100029

出　　处：《化工学报》2008年第10期2668-2675,共8页CIESC Journal

基　　金：国家自然科学基金项目(20606003);中国石油天然气股份有限公司科技风险创新基金项目(FX200501)~~

摘　　要：采用炭黑/P123(聚环氧乙烯醚-聚环氧丙烯醚-聚环氧乙烯醚三嵌段聚合物,即EO20PO70EO20,平均相对分子质量5800)双重模板剂,对Y型分子筛前驱体进行组装合成了具有原位梯度孔及高水热稳定性的材料。FT-IR结果表明,组装过程将Y型分子筛的初级和次级结构单元引入分子筛的孔壁之中。BET和TEM结果表明,材料具有相互贯通的梯度孔道(0.39nm-3.8nm-6.5nm-19.9nm),比表面积693m2·g-1,孔容1.89ml·g-1。在800℃、100%水蒸气处理2h和4h后,比表面积保留率分别为80.1%和35.1%,孔容保留率分别为45.0%和25.4%。为重油大分子的催化裂化提供了一种具有潜在应用价值的材料。A series of hydrothermally assembly of zeolite Y precursors stable composites with graded pores were synthesized via in-situ by carbon black/P123 templates. The graded composites were characterized by means of XRD, FT-IR, TEM, BET and NH3-TPD. The results of FT-IR showed that the primary and secondary structural building units of zeolite Y were introduced into the wall of zeolites. The results of BET and TEM suggested that the composites had interconnected hierarchical pore structure （0. 39 nm-3.8 nm-6.5 nm-19.9 nm）. The surface area and pore volume were 693 m^2·g^-1 and 1.89 ml·g^-1 respectively. After hydrothermal treatment at 100% steam, 800℃ for 2 h and 4 h, the remaining fractions of surface area were 80.1% and 35.1 % respectively, while the remaining fractions of pore volume were 45.0% and 25.4% respectively. The present paper provides a novel route for fabricating materials with graded pores and high hydrothermal stability which are candidates for heavy oil cracking catalysts.

关 键 词：梯度孔 组装 前驱体 双重模板 

分 类 号：O643[理学—物理化学]