| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1488130 | Materials Research Bulletin | 2015 | 6 Pages |
•Microwaves have beneficial effects on desilication of zeolites.•Produced mesopores with microwaves have narrow pore-size distribution.•Advantages and disadvantages of various desilicating agents were also reported.
1Mesoporous ZSM-5 zeolite was obtained by desilication in alkaline solutions with microwave (MW) and conventional electric (CE) heating under hydrothermal conditions. Both methods were effective in the production of mesoporous zeolites; however, MW was more efficient than CE as it led to well-defined mesopores with relatively small sizes and a narrow size distribution within a short treatment time. Moreover, the mesoporous ZSM-5 obtained through this method was effective in producing less bulky products from an acid-catalyzed reaction, specifically the butylation of phenol. Finally, various bases were found to have advantages and disadvantages in desilication. NaOH was the most reactive; however, macroporosity could develop easily under a severe condition. Ammonia water was weakly reactive; however, it could be used to precisely control the pore architecture, and no ion exchange is needed for acid catalysis. Organic amines such as ethylenediamine can also be used in desilication.
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