Journal
CHEMICAL ENGINEERING JOURNAL
Volume 335, Issue -, Pages 822-830Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.10.171
Keywords
Hierarchical; Zeolite; MFI; Claisen-Schmidt condensation
Categories
Funding
- National Natural Science Foundation of China [21202116]
- Independent Innovation Foundation of Tianjin University of China [2017XZY-0052]
- Natural Science Foundation of Tianjin of China [16JCYBJC20300]
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Hierarchical aluminosilicate zeolites were simply synthesized by a temperature-gradient strategy using conventional CTAB as single structure directing agent. The as-synthesized zeolites were composed of an ordered two-dimensional hexagonal mesopores and crystallized MFI structure. Catalytic performance of the hierarchical aluminosilicate zeolites were explored by the Claisen-Schmidt condensation of bulky reactants (benzaldehyde and 2'-hydroxyacetophenone). The reaction results showed that the hierarchical zeolites exhibit outstanding catalytic performance with a conversion as high as 73%, which may be attributed to the combined advantage of framework acidity of zeolite and the significantly improved large molecule diffussion in mesoporosity. The higher hydrothermal stability and catalytic stability than those of MCM-41 samples were proved, which were ascribed to the presence of crystallized MFI structure.
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