The hydrothermal synthesis of hierarchical SAPO-34 with improved MTO performance
| العنوان: | The hydrothermal synthesis of hierarchical SAPO-34 with improved MTO performance |
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| المؤلفون: | Peixin Rui, Chen Feibiao, Wu Zheng, Xingtian Shu, Liao Weilin, Wang Baorong, Jianming Yang, Yanjuan Xiang, Tao Guo |
| المصدر: | New Journal of Chemistry. 45:11093-11100 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Silicon, chemistry.chemical_element, 02 engineering and technology, General Chemistry, Microporous material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, 0104 chemical sciences, law.invention, Chemical engineering, chemistry, law, Materials Chemistry, Hydrothermal synthesis, Crystallization, 0210 nano-technology, Selectivity, Mesoporous material, Porosity |
| الوصف: | The fabrication of intracrystalline secondary pores is an important approach to improve the catalytic performance of microporous zeolites. Herein, a two-step crystallization process using only TEAOH/TEA has been developed for the hydrothermal synthesis of hierarchical SAPO-34. When crystalline AlPO4 characterized with four-coordinated aluminum and phosphorus atoms was applied, hierarchical SAPO-34 could hydrothermally be synthesized under the nH2O : nAl2O3 > 20 condition, and the crystallization process was analyzed. The crystalline AlPO4 is beneficial for the SAPO-34 synthesis, and hierarchical SAPO-34 with abundant intracrystalline secondary porosity can be efficiently synthesized in 2 h. Although both the distribution range and volume of the mesopores decrease with time, the mesopore volume of hierarchical SAPO-34-31 achieved 0.069 cm3 g−1. Furthermore, the silicon atoms in hierarchical SAPO-34-31 are mainly in the Si(OAl)4 and Si(OSi)(OAl)3 states, and the accessibility would be improved by the intracrystalline mesopores (16–20.3 nm). SAPO-34-31 exhibited more excellent MTO activity than the nano-sized SAPO-34, and the selectivity of ethylene and propylene achieved more than 80%, while the nC2H4 : nC3H6 is always about 0.8. |
| تدمد: | 1369-9261 1144-0546 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e15275152fedf80caedfd70461acbce3 https://doi.org/10.1039/d1nj01066b |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........e15275152fedf80caedfd70461acbce3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13699261 11440546 |
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