Pt-confinement catalyst with dendritic hierarchical pores on excellent sulfur-resistance for hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene
| Autor: | Mohnnad H. Alabsi, Xilong Wang, Yu Shi, Kuo-Wei Huang, Zhengkai Cao, Aijun Duan, Daowei Gao, Peng Zheng, Chunming Xu, Jinlin Mei, Chengkun Xiao |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Sulfide TJ807-830 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Renewable energy sources Pt-confinement effect Catalysis chemistry.chemical_compound Transition metal QH540-549.5 Sulfur-resistance chemistry.chemical_classification Hydrogen spillover Hydrodesulfurization Ecology Renewable Energy Sustainability and the Environment Mesoporous silica 021001 nanoscience & nanotechnology 0104 chemical sciences Dibenzothiophenes chemistry Chemical engineering Dibenzothiophene engineering Noble metal 0210 nano-technology |
| Zdroj: | Green Energy & Environment, Vol 7, Iss 2, Pp 324-333 (2022) |
| ISSN: | 2468-0257 |
| Popis: | Metal confinement catalyst MoS2/Pt@TD-6%Ti (TD, TS-1/Dendritic mesoporous silica nanoparticles composite) in dendritic hierarchical pore structures was synthesized and showed excellent sulfur-resistance performance and stabilities in catalytic hydrodesulfurization reactions of probe sulfide molecules. The MoS2/Pt@TD-6%Ti catalyst combines the concepts of Pt-confinement effect and hydrogen spillover of Pt noble metal. The modified micropores of Mo/Pt@TD-6%Ti only allow the migration and dissociation of small H2 molecules (0.289 nm), and effectively keep the sulfur-containing compounds (e.g. H2S, 0.362 nm) outside. Thus, the MoS2/Pt@TD-6%Ti catalyst exhibits higher DBT and 4,6-DMDBT HDS activities because of the synergistic effect of the strong H2 dissociation ability of Pt and desulfurization ability of MoS2 with a lower catalyst cost. This new concept combining H2 dissociation performance of noble metal catalyst with the desulfurization ability of transition metal sulfide MoS2 can protect the noble metal catalyst avoiding deactivation and poison, and finally guarantee the higher activities for DBT and 4,6-DMDBT HDS. |
| Databáze: | OpenAIRE |
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