Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction | |
Guo, Hangle; Ge, Tongguang; Lv, Jian; Du, Changlin; Zhou, Jian; Liu, Zhicheng; Hua, Zile | |
刊名 | EUROPEAN JOURNAL OF INORGANIC CHEMISTRY |
2019-01-10 | |
期号 | 1页码:51 |
关键词 | Zeolites Mesoporous materials Microporous materials Acidity Propylene selectivity |
ISSN号 | 1434-1948 |
DOI | 10.1002/ejic.201800926 |
文献子类 | Article |
英文摘要 | A series of hierarchically structured ZSM-5 zeolites (ZSM-5 HSZs) with a Si/Al ratio of about 200 have been successfully synthesized in the absence of additional mesoporous agents. XRD, N-2 sorption isotherms, SEM, TEM and NH3-TPD results showed that the obtained HSZs materials possess high crystallinity, interconnected micro/mesoporous structures and similar total acid amounts. Meanwhile, in the methanol-to-propylene (MTP) reaction, compared to the microporous counterpart, all synthesized ZSM-5 HSZs demonstrated superior performance benefitting from their hierarchical porous structures. Interestingly, Al-27 MAS NMR and Py-FTIR results confirmed the inter-transformation of framework and extra-framework Al species with the extension of materials crystallization duration and consequently the variation of materials surface acidity. As a result, the optimized catalyst achieved the highest initial propylene selectivity of 54.4 % and the longest catalyst lifetime (t(90)) of 175 h under the weight hourly space velocity (WHSV) of 1.0 g g(-1) h(-1). Moreover, a new "in situ alkali etching-hydrothermal restoring" mechanism has been proposed to elucidate the structural evolution of here reported high-silica ZSM-5 HSZs during the synthesis. |
WOS研究方向 | Chemistry |
语种 | 英语 |
出版者 | WILEY-V C H VERLAG GMBH |
内容类型 | 期刊论文 |
源URL | [http://ir.sic.ac.cn/handle/331005/27400] |
专题 | 中国科学院上海硅酸盐研究所 |
推荐引用方式 GB/T 7714 | Guo, Hangle,Ge, Tongguang,Lv, Jian,et al. Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction[J]. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY,2019(1):51. |
APA | Guo, Hangle.,Ge, Tongguang.,Lv, Jian.,Du, Changlin.,Zhou, Jian.,...&Hua, Zile.(2019).Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction.EUROPEAN JOURNAL OF INORGANIC CHEMISTRY(1),51. |
MLA | Guo, Hangle,et al."Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction".EUROPEAN JOURNAL OF INORGANIC CHEMISTRY .1(2019):51. |
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