甲胺改性酸碱双功能Y沸石的制备和表征  

Preparation and Characterization of Acid-base Bifunctional Y Zeolite Modified with Methylamine

作　　者：陈筱诚[1] 余辉[1] 郭娟[1] 贺鹤勇[1] 傅正文[1] 龙英才[1] 

机构地区：[1]复旦大学化学系上海市分子催化与新材料重点实验室,上海200433

出　　处：《化学学报》2009年第16期1829-1834,共6页Acta Chimica Sinica

基　　金：国家科委973(No2003CB615801)资助项目

摘　　要：以甲胺水溶液为改性剂,H-Y沸石可在416K下经水热反应制备酸碱双功能甲胺杂化H-Y沸石.X射线粉末衍射(XRD),固体29Si魔角核磁共振(29SiMAS NMR)表征表明甲胺分子与H-Y相互作用导致沸石晶胞体积明显增大,骨架产生新的Si—N键.以热重(TG/DTG)及差热分析(DTA),NH3,CO2程序升温脱附(NH3-TPD和CO2-TPD)研究杂化H-Y沸石的酸-碱性质及其经不同温度焙烧后的变化,结果表明,杂化后沸石的酸/碱量,尤其是后者增加甚大.与H-Y相比,随焙烧温度变化,该酸-碱双功能沸石材料的酸/碱量可分别提高3至7倍和1.5至26倍.An acid-basic bifunctional amine-hybrid H-Y zeolite has been hydro-thermally prepared at 416 K with methylamine solution as a modifier. Characterized with X-ray powder diffraction （XRD） and solid state 29Si magic-angle spinning nuclear magnetic resonance （29Si MAS NMR）, the obvious increase of cell volume and the appearance of new Si--N bonds in the framework have been observed. The acid-basic properties of the hybrid zeolite, investigated with TG/DTG/DTA and NH3-TPD or CO2-TPD, have been proved to be greatly enhanced. As pre-calcination at different temperatures, the acid amount and basic amount of the modified zeolite increase 3 to 7 times and 1.5 to 26 times respectively, in comparison with those of H-Y zeolite.

关 键 词：H-Y沸石 甲胺 杂化 改性 酸碱双功能 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]