Chinese Academy of Sciences

Junten Li

Weibin Fan

Jianguo Wang

Mei Dong

Zhangfeng Qin

Qiuming Zhou

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 Na&#x3b2; molecular sieve as a raw material and modifying through the following steps of: first obtaining an H&#x3b2; molecular sieve through ammonium ion-exchange, and then conducting dealumination and silicon insertion treatment of the H&#x3b2; 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%.

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Shanxi, China

Junten Li