公开(公告)号：US20210362138A1

公开(公告)日：2021-11-25

申请号：US16882573

申请日：2020-05-25

申请人： Institute of Coal Chemistry, Chinese Academy of Sciences

发明人： Weibin Fan ,  Jianguo Wang ,  Mei Dong ,  Qiuming Zhou ,  Zhangfeng Qin ,  Junfen Li

IPC分类号： B01J29/44 ,  B01J37/30 ,  B01J37/10 ,  B01J37/02

摘要： The present invention provides a catalyst for aromatization of a long-carbon chain alkane and a preparation method thereof. In the present invention, a molecular sieve containing a BEA structure is taken as an active component and mixed with a carrier, and then the mixture is formed, dried and calcined to obtain the catalyst for aromatization of a long-carbon chain alkane. The active component is prepared by taking a Naβ molecular sieve as a raw material and modifying through the following steps of: first obtaining an Hβ molecular sieve through ammonium ion-exchange, and then conducting dealumination and silicon insertion treatment of the Hβ molecular sieve through first hydrothermal treatment; forming a mesoporous structure in a molecular sieve framework through second hydrothermal treatment; reducing the acidity of the catalyst by potassium ion exchange, and finally using metal modification to improve the capability of the catalyst for catalyzing the aromatization of the long-carbon chain alkane and enhancing the toluene selectivity. The catalyst provided by the present invention shows high stability in the aromatization of the long-chain alkane and has a service life up to 170 h or above and aromatic hydrocarbon selectivity up to 80%, and the selectivity to toluene in aromatic hydrocarbon products can reach 85.5%.