摘要
分别以四甲基氢氧化铵（TMAOH）、四乙基氢氧化铵（TEAOH）和氢氧化钠（NaOH）为碱源合成了EU-1分子筛，采用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、氨气程序升温脱附（NH3-TPD）和低温N2吸附等对合成样品进行了表征，并以二甲苯异构化反应表征其催化性能。结果表明：与以NaOH为碱源相比，采用TMAOH和TEAOH可一步合成铵型EU-1分子筛，以TEAOH为碱源合成样品的粒径在200—500nm之间，比表面积高达390．2m2·g-1。
EU - 1 zeolites were successfully synthesized with three different alkali sources [ tetramethylammonium hydroxide （ TMAOH）, tetraethylammonium hydroxide （TEAOH） and sodium hydroxide （ NaOH ） ]. Structure of the product samples obtained were characterized by XRD, SEM, NH3 - TPD and BET methods. Their catalytic performance was evaluated through xylene isomerization reaction. The results showed that as comparing with the process that adopting NaOH as alkali source,the process adopting TMAOH or TEAOH can produce ammonium type EU - 1 zeolite in one step. Particle size of the product obtained from the process adopting TEAOH as alkali source is in range of 200 -500 nm, and its specific surface area achieves as high as 390.2 m2 · g-1.
出处
《日用化学工业》
CAS
CSCD
北大核心
2014年第7期387-389,412,共4页
China Surfactant Detergent & Cosmetics
基金
国家自然科学基金资助项目(20973123)
国家重点基础研究发展计划(973计划)资助项目(2012CB215002)
国际科技与交流专项资助项目(2010DFB40440)
关键词
分子筛
铵型
碱源
二甲苯异构化
催化性能
zeolite
ammonium type
alkali source
xylene isomerization
catalytic performance
