Pd/SAPO-41 Bifunctional Catalysts with Enhanced Pd Dispersion Prepared by Ultrasonic-Assisted Impregnation: High Selectivity for n-Hexadecane Hydroisomerization
| العنوان: | Pd/SAPO-41 Bifunctional Catalysts with Enhanced Pd Dispersion Prepared by Ultrasonic-Assisted Impregnation: High Selectivity for n-Hexadecane Hydroisomerization |
|---|---|
| المؤلفون: | Xuefeng Bai, Chunmu Guo, A. L. Maximov, Xiaomeng Wei, Xiaofang Su, Wei Wang, Guozhi Jia, Tong Li, Wei Wu |
| المصدر: | Russian Journal of Applied Chemistry. 93:502-511 |
| بيانات النشر: | Pleiades Publishing Ltd, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Chemistry, General Chemical Engineering, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Molecular sieve, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, Adsorption, Chemisorption, 0210 nano-technology, Dispersion (chemistry), Selectivity, Bifunctional, Incipient wetness impregnation, Nuclear chemistry |
| الوصف: | The preparation of bifunctional catalysts with high catalytic selectivity for the n-alkanes hydroisomerization still remains challenging for the production of bio-diesel. Herein, two series of Pd/SAPO-41 bifunctional catalysts are prepared by the ultrasonic-assisted impregnation (xPd/S41-U) with different treating time and conventional incipient wetness impregnation methods (0.30Pd/S41-I) on the SAPO-41 molecular sieve, respectively. The physico-chemical property of the synthesized SAPO-41 and prepared catalysts were studied by XRD, SEM, ICP, N2 physical adsorption, H2 chemisorption and Py-IR measurements. The catalytic performance for the n-hexadecane hydroisomerization over all catalysts is also studied. The characteristic results indicate that the xPd/S41-U catalysts show stronger Bronsted acidity compared with the 0.30Pd/S41-I catalyst. In addition, the Pd dispersion of the xPd/S41-U catalysts is almost two times higher than that of the 0.30Pd/S41-I catalyst, which leads more Pd cluster to enter into the micropores of the SAPO-41 molecular sieve. Furthermore, the 0.30Pd/S41-U catalyst with 0.30 wt % Pd loading shows promoted catalytic performance than that of the 0.30Pd/S41-I catalyst with the same Pd loading because of the stronger metal function and more favourable metal-acid balance caused by the larger CPd/CH+ ratio. Therefore, the ultrasonic-assisted impregnation prepared Pd/SAPO-41 catalysts are potential to be widely employed for the n-alkane hydroisomerization. |
| تدمد: | 1608-3296 1070-4272 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::c98da9ce3be5dd60b51d6789d1eabc99Test https://doi.org/10.1134/s1070427220040047Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........c98da9ce3be5dd60b51d6789d1eabc99 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16083296 10704272 |
|---|