No abstract

ZSM-5/SBA-16 (ZS) composite materials with different morphologies were synthesized successfully. The series supports were utilized to prepare NiMo/ZS for dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) hydrodesulfurization (HDS) reactions. Series ZS supports and NiMo/ZS were well characterized to investigate their structure–property relationship. The NiMo/ZS catalyst (NiMo/ZS-3) with uniform morphology and well-ordered pore channels showed the maximum k HDS and TOF values of DBT and 4,6-DMDBT HDS. The k HDS value (13.9 × 10–4 mol g–1 h–1) of DBT over NiMo/ZS-3 was more than 2 times greater than that over the reference NiMo/ZS-M catalyst (5.5 × 10–4 mol g–1 h–1), 3 times greater than that over the NiMo/SBA-16 catalyst (4.4 × 10–4 mol g–1 h–1), and almost 4 times greater than that over the NiMo/ZSM-5 catalyst (3.5 × 10–4 mol g–1 h–1). Furthermore, the k HDS value (8.4 × 10–4 mol g–1 h–1) of 4,6-DMDBT over NiMo/ZS-3 was more than 3 times greater than that over the reference NiMo/ZS-M catalyst (2.8 × 10–4 mol g–1 h–1), more than 4 times greater than that over the NiMo/SBA-16 catalyst (1.7 × 10–4 mol g–1 h–1), and almost 5 times greater than that over the NiMo/ZSM-5 catalyst (1.6 × 10–4 mol g–1 h–1). The superior DBT and 4,6-DMDBT HDS performances were assigned to the uniform morphology, well-ordered pore channels, and high B/L ratio of the NiMo/ZS-3 catalyst and the suitable dispersion of the MoS2 active phases. HYD was the preferential route for DBT HDS, while ISO was the preferential route for 4,6-DMDBT HDS because of the high B/L ratio of NiMo/ZS-3. Moreover, the DBT and 4,6-DMDBT HDS reaction networks of the series NiMo/ZS are presented.

No abstract

Micro-mesoporous Beta-SBA-15 materials with platelet, sphere, short-rod and long-rod morphologies were in situ synthesized and used as the catalyst supports for hydro-upgrading of FCC gasoline.

A micro/mesoporous material Beta-FDU-12 was successfully synthesized. The material was used as a support additive and the corresponding catalyst CoMo/BFA was post-treated with EDTA. The catalyst CoMoE/BFA exhibited excellent hydro-upgrading performance for FCC gasoline.