金属羰基络合物制备的Pt-Re/Al_2O_3催化剂的性能 Ⅰ.不同方法制备的Pt-Re/Al_2O_3催化剂上正庚烷的转化  

CATALYTIC PERFORMANCE OF Pt-Re/Al_2O_3 CATALYSTS PREPARED FROM METAL CARBONYL COMPLEXES Ⅰ.CATALYTIC CONVERSION OF n-HEPTANE ON Pt-Re/Al_2O_3 CATALYSTS PREPARED BY DIFFERENT METHODS

作　　者：吴荣安[1] 王海增[1] 杜鸿章[1] 房廉清[1] 林励吾[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023

出　　处：《Chinese Journal of Catalysis》1993年第5期333-337,共5页催化学报（英文）

基　　金：国家自然科学基金

摘　　要：考察了由[Pt_3(CO)_6]_5[NEt_4]_2与Re_2(CO)_(10)共浸或分浸制备的一系列催化剂在接近工业运转的压力下的正庚烷转化反应。以羰基金属原子簇化合物作为前身物制备的Pt-Re/Al_2O_3催化剂的活性、芳构化选择性和稳定性等明显地优于常规的以H_2PtCl_6与HReO_4溶液共浸制备的催化剂。常规Pt-Re/Al_2O_3催化剂的活性和稳定性比Pt/Al_2O_3好,但芳构化选择性降低,若引入Re_2(CO)_(10),则其催化活性、芳构化选择性和稳定性均显著提高。不同方法制备的Pt-Re/Al_2O_3催化剂的活性和稳定性的变化趋势为Pt_5Re_2>Pt_5+Re_2>Pt+Re_2>PtRe,表明Pt,Re之间存在相互作用程度的差异。A series of catalysts prepared from [Pt3 (CO)6]5 CNEt4]2 (Pt6) and Re2(CO)10(Re2) by co-impregnation or separate impregnation have been studied for the catalytic conversion of ?heptane under near commercial reaction conditions. It was observed that the catalytic performances of Pt-Re/Al2O3 prepared by different methods are quite different for the conversion of n-heptane. The activity, arornatics selectivi y and stability of Pt-Re/Al2O3 catalysts prepared from metal carbonyl clusters as precursors were remarkably higher than those of Pt-Re/Al2O3 catalysts prepared by conventional methods. The activity and stability of these catalysts increased in the order of Pt5Re2>Pt5+Re2>Pt+Re2>PtRe . The differences in reaction performance of these catalysts were mainly attributed to the difference of the interaction between platinum and rhenium.

关 键 词：金属 羰基络合物 铂铼催化剂 制备 

分 类 号：O643.36[理学—物理化学]