| Autor: |
Thanh Thien Co, Thi Yen Nhi Nguyen, Ngoc Thao Nguyen Du, Thien An Nguyen, Thanh Binh Nguyen, Thi Duyen Diep, Le Thanh Nguyen Huynh, Viet Hai Le |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
International Journal of Chemical Engineering, Vol 2024 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1687-8078 |
| DOI: |
10.1155/2024/8844774 |
| Popis: |
Using a solvent-free method, zeolite NaA was synthesized from raw kaolin, collected from Binh Duong, Vietnam. The synthesis involved thermal hydration under an alkaline solution. The catalysts based on binary nickel-silver nanoparticles were prepared through in situ reduction of metal salts in aqueous zeolitic suspension using sodium borohydride as a reducing agent. The catalysts were fully characterized by various techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET). The physicochemical properties of these catalysts were studied in detail, in which the formation of body-centered cubic crystal zeolite NaA (1-2 μm) containing the spherical shape of metallic nanoparticles with a particle size around 8–20 nm was observed. The hydrodechlorination of 2,4-dichlorophenol was performed to confirm the high catalytic activity and stability of the 10%NiAg/ZA catalyst. The results showed that the catalyst achieved over 91% conversion initially and 73% conversion after five re-uses. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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