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- W3021734391 endingPage "436" @default.
- W3021734391 startingPage "420" @default.
- W3021734391 abstract "Abstract The work reviewed here attempts to summarize the growing literature on zeolite stability in hot liquid water. This required to first establish the nature, structure and interactions of the active sites in Brønsted and Lewis acidic microporous materials in the presence of liquid water. This understanding was then transferred to zeolite stability and catalyst deactivation. While early results correctly established Si–O–Si hydrolysis as the dominant pathway compared to the Si–O–Al hydrolysis observed in steaming, it also focused extensively on the positive role of framework and extra-framework Al in stabilizing zeolites. However, stability was instead found to more directly correlate with the number of internal structural defects and intraporous water concentration. Stabilization protocols for Brønsted acidic zeolites are described in detail. In the case of Lewis acidic zeolites, their inherent hydrophobic behavior (Si/M >100) makes them more resistant towards water, however, issues such as reversible carbonaceous species formation as well as irreversible metal leaching and fouling remain. Finally, we summarize the most important factors in designing robust and efficient zeolite catalysts made to withstand hot liquid water." @default.
- W3021734391 created "2020-05-13" @default.
- W3021734391 creator A5059682111 @default.
- W3021734391 creator A5059829512 @default.
- W3021734391 date "2020-04-01" @default.
- W3021734391 modified "2023-10-15" @default.
- W3021734391 title "Recent Progress to Understand and Improve Zeolite Stability in the Aqueous Medium" @default.
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