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Browsing by Author "Portilla Ovejero, Mª Teresa"

Now showing items 1-11 of 11

"Ab initio" synthesis of zeolites for preestablished catalytic reactions

Gallego-Sánchez, Eva María; Portilla Ovejero, Mª Teresa; Paris-Carrizo, Cecilia Gertrudis; Leon Escamilla, Efigenio Alejandro; Boronat Zaragoza, Mercedes; Moliner Marin, Manuel; Corma Canós, Avelino (American Association for the Advancement of Science (AAAS), 2017)

[EN] Unlike homogeneous catalysts that are often designed for particular reactions, zeolites are heterogeneous catalysts that are explored and optimized in a heuristic fashion. We present a methodol. for synthesizing ...
A New Aluminosilicate Molecular Sieve with a System of Pores between Those of ZSM-5 and Beta Zeolite

Moliner Marin, Manuel; Gonzalez, Jorge; Portilla Ovejero, Mª Teresa; Willhammar, Tom; Rey Garcia, Fernando; Llopis Alonso, Francisco Javier; Zou, Xiaodong; Corma Canós, Avelino (American Chemical Society, 2011-06)

[EN] A new aluminosilicate zeolite (ITQ-39) has been synthesized. This is an extensively faulted structure with very small domains that makes the structure elucidation very difficult. However, a combination of adsorption ...
COMPORTAMIENTO CATALÍTICO DE LA ZEOLITA TNU-9 EN PROCESOS REACTIVOS DE LA FRACCIÓN BTX

Portilla Ovejero, Mª Teresa (Universitat Politècnica de València, 2012-01-24)

La zeolita TNU-9 es un nuevo material microporoso complejo, constituido por un sistema tridimensional de canales de 10MR con cavidades. Se ha valorado su capacidad catalítica en procesos reactivos de la fracción BTX, tales ...
Estudio de la topología de zeolitas en procesos de isomerización y desproporcionación de la fracción BTX

Martínez Franco, Raquel (Universitat Politècnica de València, 2012-05-16)

Se han estudiado zeolitas con diferente tamaño de poro (medio, grande y multiporo) y se han valorado sus capacidades catalíticas en procesos reactivos de la fracción BTX, tales como la isomerización/desproporcionación de ...
Influence of boron promotion on the physico-chemical properties and catalytic behavior of Zn/ZSM-5 in the aromatization of n-hexane

Huyen, Pham Thanh; Trinh, Vu Dinh; Portilla, M. Teresa; Martínez, Cristina (Elsevier, 2021-04-15)

[EN] The characterization and catalytic performance of Zn/ZSM-5 and Zn-B/ZSM-5 catalysts in the n-hexane aromatization was reported. Catalysts were prepared by post-synthesis ion exchange and thoroughly characterized by ...
Influence of Preparation Conditions on the Catalytic Performance of Mo/H-ZSM-5 for Methane Dehydroaromatization

Portilla, Maria Teresa; Llopis, Francisco J.; Moliner Marin, Manuel; Martínez, Cristina (MDPI AG, 2021-06)

[EN] Methane, the main component of natural gas, is an interesting source of chemicals and clean liquid fuels, and a promising alternative raw material to oil. Among the possible direct routes for methane conversion, its ...
Non-oxidative dehydroaromatization of methane:an effective reaction regeneration cyclic operation for catalyst life extension

Portilla Ovejero, Mª Teresa; Llopis Alonso, Francisco; Martínez, Cristina (Royal Society of Chemistry, 2015)

[EN] Non-oxidative methane aromatization is an attractive direct route for producing higher hydrocarbons. It is highly selective to benzene despite the low conversion due to thermodynamic limitations, and Mo/H-ZSM-5, the ...
One-pot co-crystallization of beta and pentasil nanozeolites for the direct conversion of a heavy reformate fraction into xylenes

Margarit Benavent, Vicente Juan; Portilla Ovejero, Mª Teresa; Navarro Villalba, Mª Teresa; Abudawoud, Raed; Al-Zahrani, Ibrahim M.; Shaikh, Sohel; Martínez, Cristina; Corma Canós, Avelino (Elsevier, 2019-07-05)

[EN] Upgrading of the heavy reformate fraction (HR), containing mainly C9+ aromatics, is usually performed by dealkylation or by transalkylation with added benzene and/or toluene to obtain the more valuable xylenes. However, ...
One-pot synthesis of nano-crystalline MCM-22

Tempelman, Christiaan H. L.; Portilla Ovejero, Mª Teresa; Martínez Armero, Marta Evelia; Mezari, Brahim; de Caluwe, Niek G. R.; Martínez, Cristina; Hensen, Emiel J. M. (Elsevier, 2016-01-15)

[EN] Nano-crystalline MCM-22 zeolite was synthesized in a one-pot procedure by the use of an organosilane (dimethyl-octadecyl-(3-trimethoxysilylpropyl)-ammonium chloride, TPOAC) in the zeolite synthesis gel. This crystal ...
Structure-reactivity relationship for aromatics transalkylation and isomerization process with TNU-9, MCM-22 and ZSM-5 zeolites, and their industrial implications

Portilla Ovejero, Mª Teresa; Llopis Alonso, F.J.; Martínez, Cristina; Valencia Valencia, Susana; Corma Canós, Avelino (Elsevier, 2011-02-15)

[EN] TNU-9 is a medium pore zeolite with a complex tridimensional channel system. Its catalytic properties have been studied in some reactions that involve the BTX fraction, such as benzene and toluene alkylation with ...
Zeolitas para la obtención y redistribución de aromáticos en la fracción BTX

Portilla Ovejero, Mª Teresa (Universitat Politècnica de València, 2016-01-07)

[EN] This thesis focusses on reactive processes catalysed by zeolites to obtain and convert BTX aromatics. These compounds, together with light olefins, are the pillars of the petrochemical and organic chemical industry, ...