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Listar por palabra clave "Desilication"

Mostrando ítems 1-9 de 9

Acidity and accessibility studies on mesoporous ITQ-4 zeolite

Verboekend, Danny; Villaescusa Alonso, Luis Angel; Thomas, Karine; Stan, Irina; Pérez-Ramírez, Javier (Elsevier, 2010-07-01)

[EN] Desilication of ITQ-4 (IFR code, 1-dimensional 12-MR channel system of 0.62 nm x 0.72 nm) in aqueous NaOH solutions was practiced in order to produce the zeolite in the hierarchical form, i.e. combining the native ...
Catalytic cracking performance of alkaline-treated zeolite Beta in the terms of acid sites properties and their accessibility

Tarach, K.; Gora-Marek, K.; Tekla, J.; Brylewska, K.; Datka, J.; Mlekodaj, K.; Makowski, W.; Igualada López, María Cristina; Martínez-Triguero, Joaquín; Rey Garcia, Fernando (Elsevier, 2014-04)

The zeolite Beta is considered as a promising additive for FCC catalyst in diesel oil production. In this article, it is shown that hierarchical zeolite Beta obtained by an optimized desilication procedure increases diesel ...
Catalytic performance of commercial Cu-ZSM-5 zeolite modified by desilication in NH3-SCR and NH3-SCO processes

Rutkowska, Malgorzata; Pacia, I.; Basag, S.; Kowalczyk, A.; Piwowarska, Z.; Duda, M.; Tarach, K.A.; Gora-Marek, K.; Michalik, M.; DÍAZ MORALES, URBANO MANUEL; Chmielarz, Lucjan (Elsevier, 2017-07-01)

[EN] In the presented manuscript an influence of the mesoporosity generation in commercial ZSM-5 zeolite on its catalytic performance in two environmental processes, such as NO reduction with ammonia (NH3SCR, Selective ...
Designing MFI-based catalysts with improved catalyst life for C-3(=) and C-5(=) oligomerization to high-quality liquid fuels

Corma Canós, Avelino; Martínez, Cristina; Doskocil, Eric (Elsevier, 2013)

[EN] Light olefin oligomerization is an important alternative for the production of clean liquid automotive fuels and can be performed in the presence of solid acid catalysts. Among these, medium-pore zeolites, and especially ...
Desilication of highly siliceous zeolite ZSM-5 with NaOH and NaOH/tetrabutylamine hydroxide

Sadowska, K; Góra-Marek, Kinga; Drozdek, Marek; Kustrowski, Piotr; Datka, J; Martínez-Triguero, Joaquín; Rey Garcia, Fernando (Elsevier, 2013-03-01)

The results of both chemical and XPS analysis pointed out that desilication of highly siliceous ZSM-5 of Si/Al = 164 was more effective in the surface zone than in the bulk, contrary to zeolite ZSM-5 of Si/Al = 31.6. ...
Hydrothermal stability and catalytic performance of desilicated highly siliceous zeolites ZSM-5

Tarach, Karolina A.; Martínez-Triguero, Joaquín; Rey Garcia, Fernando; Góra-Marek, Kinga (Elsevier, 2016-07)

Highly siliceous zeolites, namely MFI type have attracted the great attention due to their higher hydrothermal stability, higher selectivity to organic compounds, and often better catalytic properties in comparison with ...
Improved THETA-1 for light olefins oligomerization to diesel: Influence of textural and acidic properties

Martínez, Cristina; Doskocil, Eric J.; Corma Canós, Avelino (Springer Verlag (Germany), 2014-04)

The increase in diesel demand, especially in Europe, and the need for high fuel quality requirements are forcing refiners to move into additional processes for production of high cetane diesel in order to meet the present ...
Influence of post-synthetic modifications on the composition, acidity and textural properties of ZSM-22 zeolite

Del Campo Huertas, Pablo; Beato, P.; Rey Garcia, Fernando; Navarro, María Teresa; Olsbye, Unni; Lillerud, K.P.; Svelle, S. (Elsevier, 2018-01)

[EN] In this work, an extensive investigation of the preparation of a large body of desilicated ZSM-22 zeolites and their basic characterization is presented. We investigate the effects of the properties of the starting ...
New micro and mesoporous materials for the reaction of methanol to olefins

Li, Zhibin (Universitat Politècnica de València, 2014-11-17)

(1) We will show that nano sized samples of SAPO-34 synthesized by microwave heating presents much higher lifetime than standard-SAPO-34 synthesized by conventional hydrothermal method for the reaction of methanol to ...