公开(公告)号：US11351521B2

公开(公告)日：2022-06-07

申请号：US16604559

申请日：2018-04-20

申请人： TIANJIN UNIVERSITY

发明人： Jinlong Gong ,  Weiting Cai ,  Rentao Mu ,  Liang Zeng

IPC分类号： B01J23/42 ,  B01J23/745 ,  B01J23/75 ,  B01J23/755 ,  B01J23/89 ,  B01J35/00 ,  B01J29/03 ,  C07C5/333 ,  C07C11/06 ,  B01J23/74

摘要： A supported core-shell bimetallic catalyst with high selectivity, and preparation method and an application thereof are provided. SBA-15 is used as support, platinum (Pt) is used as active component, 3d transition metal is used as cocatalysts. In the core-shell bimetallic catalyst formed by the 3d transition metal and Pt, in one aspect, by the addition of the 3d metal in the core, the d-band center of surface Pt atoms is down shifted, and the absorption of propylene is weakened, thereby improving the selectivity for propylene. In another aspect, the use of Pt is reduced by the addition of the 3d transition metal, improving the utilization of Pt. The catalyst is applicable in a hydrogen atmosphere, has a good effect on the preparation of propylene by propane dehydrogenation and causes high dehydrogenation activity under high temperature conditions. The total selectivity for propylene may reach 85%, which achieves high propylene selectivity.