Journal
TOPICS IN CATALYSIS
Volume 53, Issue 19-20, Pages 1340-1348Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-010-9592-7
Keywords
MWW zeolites; ETBE synthesis; External surface acidity; IR and NMR studies
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Funding
- European Regional Development Fund [POIG.02.01.00-12-023/08]
- Ministry of Science and Higher Education, Warsaw [NN204 1987 33]
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A series of MWW-type zeolites of increasing Si/Al ratio were investigated with respect to their acidic properties. Concentration of the Bronsted acid centers located at the external crystal surface was invariant for the entire series. Ethanol conversion to ethyl-tert-butyl ether, proceeding only at the external surface, was also constant. The OH groups in MWW zeolites were found to be homogeneous with proton affinity value equal to 1142.7 kJ/mol.
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