高负载量丝光沸石/堇青石整体式催化剂的原位合成和表征  

In Situ Synthesis and Characterization of High-loading Mordenite/Cordierite Monolith

作　　者：薛斌[1] 李兰冬[1] 章福祥[1] 关乃佳[1] 

机构地区：[1]南开大学化学学院新催化材料科学研究所,天津300071

出　　处：《无机化学学报》2006年第12期2197-2201,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20233030;20603019;20573059);973项目(No.2003CB615801);天津大学南开大学共建项目资助

摘　　要：采用原位合成法制备了高负载量的丝光沸石/堇青石整体式催化剂,考察了晶种添加、晶化方式(静/动态)和投料硅铝比等因素的影响,通过称重计算了丝光沸石负载量,并结合XRD,SEM等表征手段对其结晶状况和形貌进行了分析。结果表明,原位合成可有效制备高负载量(最高可达47.4%)的丝光沸石/堇青石整体式催化剂。晶种添加有利于提高丝光沸石负载量。静态晶化负载量一般高于动态晶化,但动态晶化方式则有利于更高水硅比条件下丝光沸石的生成。投料硅铝比和晶化方式的协同作用,共同影响分子筛负载量和形貌。High-loading mordenite/cordierite monoliths were synthesized via an in situ hydrothermal route. Effects such as seed addition, crystallization modes （static or dynamic）, batch SiO2/Al2O3 ratios on the synthesized products were investigated. The catalyst loading was calculated with methods of weighing, crystallinity and morphology were characterized by XRD and SEM. Results indicate that high-loading mordenite/cordierite monoliths （up to 47.4%） can be obtained. The addition of seeds increases the loading of mordenite. Generally, the loading in case of static crystallization is higher than that of dynamic mode, which, however, is advantageous to the crystallization of mordenite in the system with high H2O/SiO2 ratio .Meanwhile, the synergetic effect of batch SiO2/Al2O3 ratios and crystallization modes have great influence on the loading and surface morphology of products.

关 键 词：丝光沸石 堇青石 原位合成 负载量 形貌 

分 类 号：O643.36[理学—物理化学]