摘要
以多级孔ZSM-5分子筛为载体,通过等体积浸渍法制备了一种双功能铁基催化剂,用于合成气直接制备芳烃。采用硅烷法合成不同硅铝比和介孔孔隙率的多级孔ZSM-5分子筛载体。催化剂的理化性质通过XRD、XRF、BET和HN3-TPD进行表征。结果表明:具有较高酸性的分子筛有利于提高油相中芳烃的选择性,当载体的硅铝比为40时,在油相中芳烃选择性可达66.9%;通过调节硅烷剂3-氨丙基三甲氧基硅烷(3-APTMS)的加入量来控制分子筛的介孔孔隙率,可使碳氢产物中芳烃的收率大幅度提高。
A hierarchical ZSM-5 supported iron-based bifunctional catalyst was prepared by incipient wetness impregnation method,and applied to the aromatics production from syngas directly via Fischer-Tropsch.The hierarchical ZSM-5 zeolite of different silica alumina ratio and mesoporosity was prepared by adding silane.The physical-chemical properties of the catalysts were characterized by XRD,XRF,BET and HN3-TPD.Results indicated that zeolite with relative high acid amount was beneficial to the selection of aromatics in oil phase.When the silica-alumina ratio of zeolite was 40,the selectivity of aromatics in the oil reached 66.9%.In addition,the mesoporous volume of the zeolite can be adjusted by controlling the adding amount of 3-aminopropyltrimethoxysilane(3-APTMS),which may greatly increase the aromatics yield in the hydrocarbon.
作者
文承彦
王晨光
刘琪英
陈伦刚
马隆龙
吕微
WEN Cheng-yan;WANG Chen-guang;LIU Qi-ying;CHEN Lun-gang;MA Long-long;LüWei(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《新能源进展》
2018年第3期222-228,共7页
Advances in New and Renewable Energy
基金
国家自然科学基金项目(51476175
5177060592)
中国科学院"百人计划"项目
关键词
多级孔分子筛
费托合成
芳烃
双功能催化剂
hierarchical zeolite
Fischer-Tropsch
aromatics
bifunctional catalyst
