Highly Selective Hierarchical ZnO/ZSM‑5 Catalysts for Propane Aromatization
| العنوان: | Highly Selective Hierarchical ZnO/ZSM‑5 Catalysts for Propane Aromatization |
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| المؤلفون: | B.O. Aderemi, Sharafadeen Gbadamasi, Mustapha Yusuf, Baba Y. Jibril, Ibrahim B Dauda, A.Y. Atta, Mukhtar Bello |
| المصدر: | ACS Omega, Vol 5, Iss 6, Pp 2725-2733 (2020) ACS Omega |
| بيانات النشر: | American Chemical Society, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | General Chemical Engineering, Aromatization, General Chemistry, Toluene, Article, Catalysis, Crystallinity, chemistry.chemical_compound, Chemistry, chemistry, Propane, ZSM-5, Benzene, Selectivity, QD1-999, Nuclear chemistry |
| الوصف: | Hierarchical ZnO/ZSM-5 catalysts were prepared by desilication and impregnation with 2 wt % metallic ZnO. X-ray diffraction and Fourier transform infrared (FTIR) results showed that the structures of the hierarchical zeolites were relatively preserved despite desilication but were accompanied with sequential loss in crystallinity, likewise Bro̷nsted acidity causing decline in conversion or activity of the catalyst. However, pyridine FTIR shows enhancement of the Bro̷nsted acidic sites. Throughout the activity test, the hierarchical ZnO/ZSM-5 catalysts showed an outstanding performance within 5 h on stream with the average aromatic (benzene, toluene, and xylenes) selectivity trend, represented by their NaOH concentrations 0.3 M > 0.4 M > 0.2 M > 0.1 M corresponding to 61.0, 53.5, 40.3, and 36.8%, respectively. Their average propane conversions within the same period followed a consecutive trend 0.1 M > 0.2 M > 0.3 M > 0.4 M conforming to 34.1, 24.8, 17.3, and 10.2%, respectively. These were compared with that of the reference (ZnO/ZSM-5), which exhibited an average aromatic selectivity of 25.2% and propane conversion of 39.7%. Furthermore, the hierarchical catalyst generally displayed a low amount of C9+ heavier aromatics with the ZnO/ZSM-5(0.3 M) catalyst having the lowest C9+ selectivity of 23.7% compared to the reference catalyst with 72.7% at the same time on stream. |
| اللغة: | English |
| تدمد: | 2470-1343 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57b10cdc6da1ac5a3e0dd067d08b4881 https://doaj.org/article/7bf0a837dd77432eb500c96f57ef08c0 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....57b10cdc6da1ac5a3e0dd067d08b4881 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 24701343 |
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