水热固相法将稀土引入Y型分子筛的研究  

Doping of rare-earth cations into Y-zeolite by solid-state ion exchange

作　　者：刘亚纯[1] 伏再辉[1] 甘俊[2] 刘志坚[2] 于向真[2] 

机构地区：[1]湖南师范大学精细催化合成研究所,湖南长沙410081 [2]中国石化长岭炼化公司,湖南岳阳414012

出　　处：《工业催化》2003年第8期43-47,共5页Industrial Catalysis

摘　　要：用XRD和静态低温氮吸附容量法考察了不同水蒸汽焙烧条件对FCC催化剂的晶胞、相对结晶保留度、比表面积和孔结构等物化性能的影响。通过高级裂化评价装置(ACE)和NH3-TPD酸性测试考察了水蒸汽焙烧条件对FCC催化剂催化性能和酸性的影响,发现含稀土FCC催化剂在合适水蒸汽条件下焙烧后,其物化性能和催化性能明显改善,这是因为其中的稀土化合物和Y型分子筛发生了固相离子交换反应并迁移至分子筛晶内的结果。Influence of steam calcination condition on the surface area, pore structure, unit cell and rel-ative crystallinity of rare-earth-containing FCC catalyst was investigated using XRD and static low-temperature nitrogen adsorbance. Influence of steam calcination condition on properties and acidity of FCC catalyst was also investigated using ACE (Advanced Cracking Evaluation) unit and NH3-TPD. The results showed that physicochemical and catalytic properties of FCC catalyst were remarkably im-proved by steam calcination under appropriate condition, which can be explained by promotion of solid-state ion exchange between Y zeolite and rare-earth by steam calcination and migration of rare-earth cations into the sodalite cage as the result.

关 键 词：FCC催化剂 Y型分子筛 稀土 固相离子交换反应 水蒸汽焙烧 

分 类 号：TQ426.95[化学工程] TE624.41[石油与天然气工程—油气加工工程]