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Browsing by Author "Martínez Sánchez, Mª Cristina"

Now showing items 1-20 of 36

Activation and conversion of alkanes in the confined space of zeolite-type materials

Del Campo Huertas, Pablo; Martínez, Cristina; Corma Canós, Avelino (The Royal Society of Chemistry, 2021-08-07)

[EN] Microporous zeolite-type materials, with crystalline porous structures formed by well-defined channels and cages of molecular dimensions, have been widely employed as heterogeneous catalysts since the early 1960s, due ...
Activation of n-pentane while prolonging HZSM-5 catalyst lifetime during its combined reaction with methanol or dimethyl ether

Cordero-Lanzac, Tomás; Martínez, Cristina; Aguayo, Andrés T.; Castaño, Pedro; Bilbao, Javier; Corma Canós, Avelino (Elsevier, 2022-01-01)

[EN] This work explores the synergies during combined reactions of n-pentane (nC5) with oxygenates (methanol or dimethyl ether, OX). The experimental runs have been carried out in a packed bed reactor at 500 °C, using a ...
CO(2)hydrogenation using bifunctional catalysts based on K-promoted iron oxide and zeolite: influence of the zeolite structure and crystal size

García-Hurtado, Elisa; Rodríguez-Fernández, Aida; Moliner Marin, Manuel; Martínez, Cristina (The Royal Society of Chemistry, 2020-08-21)

[EN] In the present manuscript, the influence of the zeolite structure and crystal size on bifunctional tandem catalysts combining K-promoted iron oxide (K/Fe3O4) with different zeolites has been studied for the ...
Continuous supercritical synthesis of unsupported and high specific surface area catalyst precursors for deep-hydrodesulfurization

Theodet, Manuel; Quilfen, Cyril; Martínez, Cristina; Aymonier, Cyril (Elsevier, 2016-11)

Unsupported and high specific surface area (S-BET) catalyst precursors for deep-hydrodesulfurization (deep-HDS) are obtained using an environmental friendly, continuous and fast synthesis process in supercritical water/alcohol ...
Control of the Reaction Mechanism of Alkylaromatics Transalkylation by Means of Molecular Confinement Effects Associated to Zeolite Channel Architecture

Margarit Benavent, Vicente Juan; OSMAN, MOGAHID; Al-Khattaf, Sulaiman; Martínez, Cristina; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (American Chemical Society, 2019-07-05)

[EN] Transalkylation of alkylaromatics catalyzed by acid zeolites is a process widely employed in the petrochemical industry for upgrading aromatic fractions. The reaction mechanism is complex as it can proceed either by ...
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 ...
Direct Dual-Template Synthesis of MWW Zeolite Monolayers

Margarit Benavent, Vicente Juan; Martínez Armero, Marta Evelia; Navarro Villalba, Mª Teresa; Martínez, Cristina; Corma Canós, Avelino (Wiley, 2015-11-09)

A two-dimensional zeolite with the topol. of MWW sheets has been obtained by direct synthesis with a combination of two org. structure-directing agents. The resultant material consists of approx. 70 % single and double ...
Direct Synthesis of Nano-Ferrierite along the 10-Ring-Channel Direction Boosts Their Catalytic Behavior

Margarit Benavent, Vicente Juan; Díaz-Rey, Maria Del Rocio; Navarro Villalba, Mª Teresa; Martínez, Cristina; Corma Canós, Avelino (John Wiley & Sons, 2018)

[EN] Ferrierite zeolites with nanosized crystals and external surface areas higher than 250m(2)g(-1) have been prepared at relatively low synthesis temperature (120 degrees C) by means of the collaborative effect of two ...
Efficient Oligomerization of Pentene into Liquid Fuels on Nanocrystalline Beta Zeolites

Díaz-Rey, Maria Del Rocio; Paris-Carrizo, Cecilia Gertrudis; Martínez Franco, Raquel; Moliner Marin, Manuel; Martínez, Cristina; Corma Canós, Avelino (American Chemical Society, 2017)

[EN] Light alkenes oligomerization, performed in the presence of heterogeneous acid catalysts, is an interesting alternative for the production of clean liquid fuels. The process, when catalyzed by zeolites, is flexible ...
ESTUDIO CATALÍTICO PARA LA ALQUILACIÓN DE BENCENO CON PROPILENO

Clari Abad, Víctor Santiago (Universitat Politècnica de València, 2011-11-22)

Se compararon las características catalíticas de distintas zeolitas de la familia MWW para la alquilación de benceno con propileno. A través del conocimiento de las propiedades del catalizador, se pretende entender el ...
Ge-Based Hybrid Composites from Ge-Rich Zeolites as Highly Conductive and Stable Electronic Materials

Rodríguez-Fernández, Aida; Atienzar Corvillo, Pedro Enrique; Martínez, Cristina; Román-Leshkov, Yuriy; Moliner Marin, Manuel (American Chemical Society, 2019-09-24)

[EN] Ge-containing zeolites were used as precursors for the synthesis of highly conductive and stable hybrid electronic materials by postsynthetic thermal treatment of the crystals in the presence of an olefin. Treating ...
High-silica nanocrystalline Beta zeolites: efficient synthesis and catalytic application

Martínez Franco, Raquel; Paris-Carrizo, Cecilia Gertrudis; Martínez Armero, Marta Evelia; Martínez, Cristina; Moliner Marin, Manuel; Corma Canós, Avelino (The Royal Society of Chemistry, 2015)

[EN] An efficient synthesis methodology to obtain homogeneous nanosized high-silica Beta zeolites ( 10¿20 nm) with high solid yields (above 95%) using simple alkyl-substituted flexible dicationic OSDAs is described. These ...
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 ...
Increasing the stability of the Ge-containing extra-large pore ITQ-33 zeolite by post-synthetic acid treatments

Rodríguez-Fernández, Aida; Llopis Alonso, Francisco J.; Martínez, Cristina; Moliner Marin, Manuel; Corma Canós, Avelino (Elsevier, 2018-09-01)

[EN] Extra-large pore ITQ-33 zeolite (ITT, 18 x 10 x 10-rings) is a very promising catalyst for the catalytic cracking of gasoil but, unfortunately, this material shows a limited hydrothermal stability due to the large ...
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 ...
Influencia del contenido de nitrógeno y azufre sobre la regeneración de catalizadores de FCC

Cómbita Merchán, Diego Fernando (Universitat Politècnica de València, 2012-01-25)

La necesidad de procesar crudos cada vez más pesados y con concentraciones mayores de contaminantes exige estudiar su influencia sobre los procesos empleados en el refino del petróleo. El proceso de FCC (Fluid Catalytic ...
Inorganic molecular sieves: Preparation, modification and industrial application in catalytic processes

Martínez Sánchez, Mª Cristina; Corma Canós, Avelino (Elsevier, 2011-07)

[EN] The increasing environmental concern and promotion of “green processes” are forcing the substitution of traditional acid and base homogeneous catalysts by solid ones. Among these heterogeneous catalysts, zeolites and ...
ITQ-39 zeolite, an efficient catalyst for the conversion of low value naphtha fractions into diesel fuel: The role of pore size on molecular diffusion and reactivity

Martínez Armero, Marta Evelia; Moliner Marin, Manuel; Sastre Navarro, German Ignacio; Rey Garcia, Fernando; Martínez, Cristina; Corma Canós, Avelino (Elsevier, 2016-01)

[EN] ITQ-39, a multipore zeolite with interconnected 12- and 10-ring channel systems, effectively catalyzes the alkylation of two low value naphtha fractions for the production of diesel range alkylaromatics. A catalytic ...
Mechanistic differences between methanol and dimethyl ether carbonylation in side pockets and large channels of mordenite

Boronat Zaragoza, Mercedes; Martínez, Cristina; Corma Canós, Avelino (The Royal Society of Chemistry, 2011)

[EN] The activity and selectivity towards carbonylation presented by Bronsted acid sites located inside the 8MR pockets or in the main 12MR channels of mordenite is studied by means of quantum-chemical calculations, and ...