Highly efficient hydrodesulfurization driven by an in-situ reconstruction of ammonium/amine intercalated MoS2 catalysts
Tianlan Yan, Yingshuai Jia, Kaige Hou, Zhuxin Gui, Wenbiao Zhang, Ke Du, Di Pan, He Li, Yanghao Shi, Lu Qi, Qingsheng Gao, Yahong Zhang, Yi Tang
Abstract
Hydrodesulfurization (HDS) is a commonly used route for producing clean fuels in modern refinery. Herein, ammonium/amine-intercalated MoS 2 catalysts with various content of 1T phase and S vacancies have been successfully synthesized. Along with the increment of 1T phase and S vacancies of MoS 2 , the initial reaction rate of the HDS of dibenzothiophene (DBT) can be improved from 0.09 to 0.55 μmol·g cat −1 ·s −1 , accounting for a remarkable activity compared to the-state-of-the-art catalysts. In a combinatory study via the activity evaluation and catalysts characterization, we found that the intercalation species of MoS 2 played a key role in generating more 1T phase and S vacancies through the ‘intercalation-deintercalation' processes, and the hydrogenation and desulfurization of HDS can be significantly promoted by 1T phase and S vacancies on MoS 2 , respectively. This study provides a practically meaningful guidance for developing more advanced HDS catalysts by the intercalated MoS 2 -derived materials with an in-depth understanding of structure-function relationships.