镧改性Pt/KL沸石芳构化催化剂的研究  

Study on Pt Supported LaKL Zeolite Catalyst for n-hexane Aromatization

作　　者：郑坚[1] 董家禄[1] 须沁华[1] 

机构地区：[1]南京大学化学化工学院

出　　处：《中国稀土学报》1998年第2期170-173,共4页Journal of the Chinese Society of Rare Earths

摘　　要：在Ｐｔ／ＬａＫＬ沸石催化剂中ＰｔＬａ之间存在有相互作用，伴随着Ｌａ３＋的迁移，Ｐｔ粒子更多地进入沸石孔道内部，而不是聚集于沸石外表面，因而改善了Ｐｔ的分散度。适量Ｌａ的引入既保持了Ｐｔ／ＫＬ沸石催化剂较高的芳构化性能，又能较大程度地改善其抗硫性能。129XeNMR and TEM were used to study the location and dispersion of Pt particles in KL zeolite with lanthanum incorporation. Due to the interaction between Pt and La, more Pt particles accompanying La^3+ were located in the inner channels of KL zeolite, rather than agglomerated in the external surface. The dispersion of Pt particles was therefore improved. Pt/KL zeolite modified by La showed a little lower reactivity for n-hexane aromatization ,but much higher resistance to sulfurpoisoning because of the existence of new acidic sites.

关 键 词：镧 KL沸石 催化剂 芳构化 沸石 铂 改性 

分 类 号：O643.36[理学—物理化学]