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Listar por palabra clave "ZSM-5"

Mostrando ítems 1-15 de 15

Alkali poisoning of Fe-Cu-ZSM-5 catalyst for the selective catalytic reduction of NO with NH3

Jouini, Houda; Mejri, Imène; Martinez-Ortigosa, Joaquin; Cerrillo, Jose L.; Petitto, Carolina; Mhamdi, Mourad; Blasco Lanzuela, Teresa; Delahay, Gérard (Springer-Verlag, 2022-08)

[EN] Fe (2 wt%)-Cu (1.5 wt%)-ZSM-5 SCR catalyst contacted 1.5 wt% of Na and 1.8 wt% of K in order to simulate poisoning by species more specifically contained in exhaust gases from exhaust gases of diesel engines and power ...
Ammonia-Containing Species Formed in Cu-Chabazite As Per In SituEPR, Solid-State NMR, and DFT Calculations

Moreno González, Marta; Hueso Fuentes, Beatriz; Boronat Zaragoza, Mercedes; Blasco Lanzuela, Teresa; Corma Canós, Avelino (American Chemical Society, 2015-03-19)

Nowadays, the most attractive technology for the elimination of nitric oxides from the exhaust gas of diesel vehicles is the selective catalytic reduction with ammonia (NH3-SCR-NOx) using Cu zeolite with the chabazite ...
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 ...
Characterization and NH3-SCR reactivity of Cu-Fe-ZSM-5 catalysts prepared by solid state ion exchange: The metal exchange order effect

Jouini, Houda; Mejri, Imène; Petitto, Carolina; Martinez-Ortigosa, Joaquin; Vidal Moya, José Alejandro; Mhamdi, Mourad; Blasco Lanzuela, Teresa; Delahay, Gerard (Elsevier, 2018-04)

[EN] The selective catalytic reduction (SCR) of NO with NH3 in the presence of O-2 and H2O over a series of Fe and/or Cu-containing ZSM-5 catalysts prepared by solid state ion exchange (SSIE) was investigated. A wide number ...
Diffusion of Trimethylbenzenes and Xylenes in Zeolites with 12-and 10-Ring Channels as Catalyst for Toluene-Trimethylbenzene Transalkylation

Toda-Calderón, Jordi; Corma Canós, Avelino; Sastre Navarro, German Ignacio (American Chemical Society, 2016-08-04)

A molecular dynamics study of the diffusion of trimethylbenzene (TMB) and xylene molecules involved in toluene and TMB transalkylation reaction has been performed over 6 different pure-silica zeolites, containing 10- and ...
Direct synthesis of DME from syngas on hybrid CuZnAl/ZSM-5 catalysts: New insights into the role of zeolite acidity

García Trenco, Andrés; Martinez Feliu, Agustin (Elsevier, 2012)

[EN] A commercial HZSM-5 zeolite (Si/Al = 16) was submitted to mild acid treatment and partial exchange of H+ by Na+ and Co2+ cations in order to produce samples with different amounts and strengths of Brensted and Lewis ...
Diseño de catalizadores bifuncionales óxido-zeolita para la conversión selectiva de syngas a aromáticos BTEX

Canales Martínez, Pablo (Universitat Politècnica de València, 2024-07-03)

[ES] El aumento constante de las emisiones de gases de efecto invernadero, especialmente el CO2, debido al uso excesivo de combustibles fósiles, es una de las principales causas del calentamiento global y sus consecuencias ...
Host-Guest and Guest-Guest Interactions of P- and N-Containing Structure Directing Agents Entrapped inside MFI-Type Zeolite by Multinuclear NMR Spectroscopy

Martinez-Ortigosa, Joaquin; Simancas-Coloma, Jorge; Vidal Moya, José Alejandro; Gaveau, Philippe; Rey Garcia, Fernando; Alonso, B.; Blasco Lanzuela, Teresa (American Chemical Society, 2019-09-12)

[EN] Highly crystalline pure silica MFI zeolites have been synthesized using tetraethylammonium (TEA), tetraethylphosphonium (TEP), or a mixture of both cations in different proportions as organic structure directing agents ...
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 ...
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 ...
Rigid/Flexible Organic Structure Directing Agents for Directing the Synthesis of Multipore Zeolites: A Computational Approach

Pulido, Angeles; Moliner Marin, Manuel; Corma Canós, Avelino (American Chemical Society, 2015-04-09)

[EN] The preferential crystallization of pure silica ITQ-39 and MFI zeolites using SDAEt and SDAPr, respectively, as organic structure directing agents (SDAs) is investigated here by theoretical methods using a periodic ...
Single and combined effects of Bottom cracking (BCA) and Propylene booster (PBA) separate particles additives addition to a Fluid Catalytic Cracking (FCC) catalyst on the FCC product distribution and quality

Mathieu, Yannick; Corma Canós, Avelino; Echard, Michael; Bories, Marc (Elsevier, 2012-10-10)

In the present work, we have investigated how the single and combined addition of commercial separate particle additives, such as Bottom Cracking additive (BCA) and Propylene Booster additive (ZSM-5 based-PBA), to a FCC ...
SÍNTESIS DE ZEOLITAS CON PROPIEDADES TEXTURALES Y DE CONFINAMIENTO ADECUADAS PARA SU USO COMO CATALIZADORES EN REACCIONES QUÍMICAS DE INTERÉS INDUSTRIAL

Gallego Sánchez, Eva María (Universitat Politècnica de València, 2020-01-07)

[ES] Las zeolitas son materiales microporosos cristalinos formados por una red de tetraedros TO4 (T = Si, Al, Ti, ...) interconectados entre sí compartiendo átomos de oxígeno, que generan estructuras tridimensionales ...
Síntesis y caracterización de zeolitas ZSM-5 preparadas en medio fluoruro empleando distintos agentes orgánicos directores de estructura

Franco Sus, Jorge (Universitat Politècnica de València, 2019-01-09)

Este proyecto tiene por objeto la preparación de zeolita ZSM-5 en composición puramente silícea y con distintos contenidos en Al empleando aniones fluoruro como agente movilizante y diferentes cationes orgánicos como agentes ...
Stabilized hierarchical USY zeolite catalysts for simultaneous increase in diesel and LPG olefinicity during catalytic cracking

Martínez, Cristina; Verboekend, Danny; Pérez-Ramírez, Javier; Corma Canós, Avelino (Royal Society of Chemistry, 2013)

Hierarchical USY zeolites obtained by scalable and affordable post-synthetic modifications (PSM) are stabilized by means of REO ion exchange and/or hydrothermal treatments, leading to FCC catalysts with improved hydrothermal ...