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Enhanced performances in catalytic oxidation of o-xylene over hierarchical macro-/mesoporous silica-supported palladium catalysts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Qiao, Nanli Zhang, Xin Li, Yang Zhang, Zhongshen Cheng, Jie Hao, Zhengping |
| Copyright Year | 2015 |
| Abstract | A series of hierarchical macro-/mesoporous silica supports (MMSs) were successfully synthesized using dual-templating technique employing polystyrene (PS) spheres and the Pluronic P123 surfactant. Pd was next loaded on the hierarchical silica supports via colloids precipitation method. Physicochemical properties of the synthesized samples were characterized by various techniques and all catalysts were tested for the total oxidation of o-xylene. Among them, the Pd/MMS-b catalyst with tetraethoxysilane/polystyrene weight ratio of 1.0 exhibited superior catalytic activity, and under a higher gas hourly space velocity (GHSV) of 70000 h–1, the 90% conversion of o-xylene has been obtained at around 200°C. The BET and SEM results indicated that Pd/MMSb catalyst possesses high surface area and large pore volume, and well-ordered, interconnected macropores and 2D hexagonally mesopores hybrid network. This novel ordered hierarchical porous structure was highly beneficial to the dispersion of active sites Pd nanoparticles with less aggregation, and facilitates diffusion of reactants and products. Furthermore, the Pd/MMS-b catalyst possessed good stability and durability. |
| Starting Page | 458 |
| Ending Page | 466 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s11783-015-0802-1 |
| Volume Number | 10 |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/s11783-015-0802-1 |
| Alternate Webpage(s) | https://doi.org/10.1007/s11783-015-0802-1 |
| Journal | Frontiers of Environmental Science & Engineering |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
