FeY分子筛的合成、表征及其加氢裂化活性  

Synthesis,Characterization and Hydrocracking Activity of FeY Molecular Sieve

作　　者：鞠雅娜[1] 沈志虹[1] 朱俊哲[1] 王秀林[1] 

机构地区：[1]中国石油大学中国石油天然气集团公司催化重点实验室,北京102249

出　　处：《石油化工》2006年第7期629-632,共4页Petrochemical Technology

基　　金：国家重点基础研究发展计划(973计划)项目(2004CB217806)

摘　　要：采用水热法合成了骨架含杂原子Fe的Y分子筛,并经处理得到超稳Y(USY)分子筛超稳FeY(USFeY)分子筛。利用X射线衍射、红外光谱、紫外可见漫反射光谱(UV-V is-DRS)、热重(TG)法对FeY分子筛进行了表征,结果表明,随Fe含量的增加,FeY分子筛的晶化时间延长,结晶度降低,晶胞常数增大;FeY分子筛的骨架伸缩振动峰向低波数方向移动;FeY分子筛的UV-V is-DRS谱图上不存在非骨架Fe的特征吸收峰;在600℃通氢气处理1h后,FeY分子筛的TG曲线仍无还原峰出现,以上结果均表明Fe进入了Y分子筛的骨架中。利用吡啶吸附红外光谱测定了USY和USFeY分子筛的表面酸性,并对以USY和USFeY分子筛为载体制备的催化剂的加氢裂化活性进行了评价,实验结果表明,与USY分子筛相比,USFeY分子筛的B酸、弱L酸量及总酸量增加,催化剂的加氢裂化活性提高。FeY molecular sieves were synthesized by hydrothermal process. Effect of Fe, which was introduced into framework of Y molecular sieves, on properties of Y molecular sieves was investigated by means of XRD, IR, UV-Vis-DRS and pyridine-IR. Hydrocracking activities of catalysts were evaluated using n-decane as model compound. Due to introduction of Fe, crystallinity of molecular sieves declined, unit cell parameter enlarged and framework vibration bands shifted to lower wavenumber. UV-Vis-DRS results indicated that FeY molecular sieves only contained framework Fe which existed in tetrahedral coordinated form in framework of Y molecular sieves. Iron ions in framework of Y molecular sieves were stable and could not be reduced to Fe （Ⅱ） by hydrogen at 600℃ for 1 h. Comparing to USY molecular sieves, Bronsted acid sites of USFeY molecular sieves increased and their strong Lewis acid sites decreased. Hydrocracking activity of catalyst was improved with USFeY molecular sieves used as support.

关 键 词：杂原子 FeY分子筛 水热合成 表征 加氢裂化 催化剂 

分 类 号：TQ655[化学工程—精细化工]