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], and FER zeolites [ 16 – 18 ]. On the other hand, alkali-metal exchanged Y zeolites, MCM-22, and Al-SBA-15 materials exhibit significantly lower initial adsorption heats ranging from 38 to 31 kJ/mol [ 6 , 19 – 22 ]. It is caused by differences in the

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Journal of Thermal Analysis and Calorimetry
Authors: Maria J. F. Costa, Antonio S. Araujo, Edjane F. B. Silva, Mirna F. Farias, Valter J. Fernandes Jr., Petrus d’Amorim Santa-Cruz, and José G. A. Pacheco

hydrocarbon cracking catalyst over traditional Y-zeolite, for instance, is limited by the low accessibility to its micropores, which have diameters smaller than 1 nm [ 1 ]. In order to increase the accessibility of the catalysts for refining, mesoporous

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calorimetry . J Therm Anal Calorim . 10.1007/s10973-010-1036-x . 13. Moise , JC , Bellat , JP , Methiever , A . Adsorption of water vapor on X and Y zeolites exchanged with barium

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Reaction Kinetics, Mechanisms and Catalysis
Authors: Alexander Khassin, Georgiy Filonenko, Tatyana Minyukova, Irina Molina, Lyudmila Plyasova, Tatyana Larina, and Vladimir Anufrienko

clusters in Cu–MgO system was earlier supposed based on ESR studies. Clusters of Cu 2+ with strong exchange interaction should not be confused with weakly interacting associates of Cu 2+ cations (e.g. those observed in the cavities of Y-zeolites [ 16

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conditions as follows: dehydration of fructose to LA over LZY zeolite [ 9 ] and dehydration of glucose by Y zeolite [ 10 , 11 ] at temperatures between 383–433 K for 8–15 h gave yields of LA around 40% with a low yield of HMF (ca. 4%). ZRP zeolites with

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modified Y-zeolite [ 30 ], modified mordenite [ 31 ], montmorillonite ion-exchanged with a multivalent metal ion (e.g., Al 3+ montmorillonite) [ 32 ], mixed metal oxides (e.g., TiO 2 –MoO 3 ) [ 33 ], oxides treated with sulfuric acid at 500 °C (e.g., SO 4

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of 4-methylpentan-2-ol over alkali–metal ion-exchanged X and Y zeolites: a microcalorimetric and catalytic investigation . Micropor Mater . 1997 ; 11 : 117 – 126 . 10.1016/S0927-6513(97)00030-8 . 21

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