“蒸汽相转化”法制备纳米晶组成的块状方钠石多级孔沸石催化材料  

Synthesis of Monolith Hierarchical Sodalite Zeolite Composed of Nanocrystals by Steam-Assisted Conversion Method

作　　者：秦波[1,2] 孔庆岚 刘芝平 杨晓娜[1] 宁伟巍 杜艳泽 郑家军[1] QIN Bo;KONG Qing-Lan;LIU Zhi-Ping;YANG Xiao-Na;NING Wei-Wei;DU Yan-Ze;ZHENG Jia-Jun(Research Centre of Energy Chemical&Catalytic Technology,Taiyuan University of Technology,Taiyuan 030024,China;Dalian Research Institute of Petroleum&Petrochemicals,SINOPEC,Dalian,Liaoning 116045,China)

机构地区：[1]太原理工大学能源化工与催化研究中心,太原030024 [2]大连石油化工研究院,大连116045

出　　处：《无机化学学报》2018年第11期2025-2031,共7页Chinese Journal of Inorganic Chemistry

基　　金：中国石油化工股份有限公司(No.116050);山西省科技创新重点团队项目(No.2014131006);山西省煤基重点科技攻关项目(No.FT201402-03)资助

摘　　要：将实验室合成的聚苯乙烯乳胶微球(PS)加入制备方钠石(SOD)沸石的前驱体凝胶中,在45℃条件下制得干凝胶,随后采用"蒸汽相转化"法制备了大块状SOD沸石材料。对影响多级SOD沸石形成因素进行了详细讨论。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、N_2吸附-脱附和压汞技术等表征手段对制备的材料进行了详细表征。结果表明通过"蒸汽相转化"法制备的大块状SOD沸石由球状多晶聚集体构成,这些球状多晶聚集体又是由粒径为50~100 nm的初级纳米晶粒组成,在初级纳米晶粒上和纳米晶粒之间形成了2~50 nm介孔结构以及由脱除PS微球形成的50~300 nm的大孔结构。Hierarchical sodalite(SOD)zeolite was synthesized by“steam-assisted conversion(SAC)”method using the as-synthesized polystyrene(PS)microspheres as templates.The factors affecting the formation of the hierarchical SOD were discussed in details.The as-synthesized samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N2 adsorption-desorption,and mercury intrusion method.The results exhibited that the as-synthesized monolithic SOD zeolite consisted of sphere-like polycrystalline aggregates which were further composed of primary SOD nano-crystals with a size of 50~100 nm.An intercrystalline and intracrystalline mesoporous structure ranging from 2 to 50 nm along with a macropore with 50~300 nm resulted from the removal of PS microspheres were created in the as-prepared SOD samples.

关 键 词：方钠石 沸石 蒸汽相转化 大孔 聚苯乙烯微球 

分 类 号：TQ426[化学工程]