多维NaY分子筛的水热稳定性研究  

Study on hydrothermal stability of DNY zeolites

作　　者：黄志青[1] 马跃龙[1] 田辉平[1] 齐世锋[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《工业催化》2009年第10期27-31,共5页Industrial Catalysis

摘　　要：引入功能梯度化设计概念,合成了表面多维化的NaY分子筛,采用X射线衍射、X射线荧光光谱、比表面积、微反活性和小型流化床催化剂评价装置(ACE)等表征分子筛及其催化剂老化前后的性能。结果表明,由多维NaY分子筛制备的稀土Y型分子筛REY-D,其水热稳定性低于常规NaY分子筛所制得的REY-C分子筛。当分子筛与基质结合后,结果相反,多维NaY分子筛催化剂的老化活性高于常规NaY分子筛所制得的催化剂,且随着老化时间的延长,效果更明显。ACE选择性测试结果表明,采用多维NaY分子筛所制得的催化剂汽油收率高,而重油和柴油收率低,且汽油产品中烯烃含量低,液化气中的低碳烯烃含量高。A NaY zeolite with multi-dimensional surface （DNY） was synthesized using function-gradient design concept and properties of the zeolite and the zeolite-based catalysts were characterized by XRD, XRF, BET, MAT and ACE. The results showed that hydrothermal stability of the rare-earth Y zeolite REY-D prepared from the as-synthesized NaY zeolite was inferior to that of REY-C zeolite prepared from conventional NaY zeolite, while reversed results were observed after combining the REY zeolite with matrix, and these tendency became more and more remarkable with aging time. ACE test results showed that catalysts prepared from the as-synthesized NaY zeolite exhibited higher selectivity to gasoline and lower selectivity to heavier and diesel oil, with low content of olefins in gasoline and higher content of olefins in LPG.

关 键 词：催化剂工程 多维分子筛 表面富硅 水热稳定性 功能梯度化 降烯烃性能 

分 类 号：TQ426.95[化学工程] TE624.91[石油与天然气工程—油气加工工程]