Preparation of composite zeolites in polymer hydrogels and their catalytic performances in the methanol-to-olefin reaction
| Autor: | Yuzhong Zhan, Li Han, Jun Xu, Baishun Wang, Chuan Zhao, Tianliang Lu, Xin-Ge Jiang, Jianfeng Wang, Aditya Rawal |
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| Rok vydání: | 2017 |
| Předmět: |
Olefin fiber
Materials science General Chemical Engineering Polyacrylamide Composite number Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Desorption Polymer chemistry Self-healing hydrogels Methanol 0210 nano-technology Zeolite |
| Zdroj: | Fuel Processing Technology. 165:87-93 |
| ISSN: | 0378-3820 |
| DOI: | 10.1016/j.fuproc.2017.05.018 |
| Popis: | ZSM-5/AlPO 4 -5 composite zeolites were prepared in polyacrylamide (PAM) hydrogels and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), N 2 isothermal adsorption-desorption, nuclear magnetic resonance (NMR) and temperature-programmed desorption of ammonia (NH 3 -TPD). In addition, the catalytic performances of the composite zeolites in the methanol-to-olefin (MTO) reaction were examined. The results indicate that introducing PAM into the synthesis gel of ZSM-5/AlPO 4 -5 facilitates both the formation of the ZSM-5/AlPO 4 -5 composite zeolite and the improvement of the catalyst performance. Moreover, the catalyst acidities are closely related to their selectivities for the MTO reaction. The composite zeolite obtained in the PAM hydrogel has a lower density of total acid sites and a higher selectivity for light olefins compared with the composite zeolite prepared without the PAM. |
| Databáze: | OpenAIRE |
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