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Abatement of hydrocarbons by acid ZSM-5 and BETA zeolites under cold-start conditions

Authors :
Universidad de Alicante. Departamento de Química Inorgánica
Universidad de Alicante. Instituto Universitario de Materiales
Puértolas Lacambra, Begoña
López, José Manuel
Navarro, María Victoria
García Martínez, Tomás
Murillo, Ramón
Mastral Lamarca, Ana María
Varela Gandía, Francisco José
Lozano-Castello, Dolores
Bueno López, Agustín
Cazorla-Amorós, Diego
Universidad de Alicante. Departamento de Química Inorgánica
Universidad de Alicante. Instituto Universitario de Materiales
Puértolas Lacambra, Begoña
López, José Manuel
Navarro, María Victoria
García Martínez, Tomás
Murillo, Ramón
Mastral Lamarca, Ana María
Varela Gandía, Francisco José
Lozano-Castello, Dolores
Bueno López, Agustín
Cazorla-Amorós, Diego
Publication Year :
2013

Abstract

Simulated cold-start tests have been carried out to evaluate the performance of H-ZSM-5 and H-BETA zeolites as hydrocarbon traps under simulated gasoline car exhaust gases, paying special attention to the effect of water on their behaviour. It is concluded that the hydrothermal treatment of the zeolites in the acidic form contributes to the better performance of these materials as hydrocarbon traps since the stabilization of the zeolites takes place. Moreover, the decrease of the surface acidity of the zeolites results in an increase of the Si/Al ratio, which contributes to the decrease of the water affinity for adsorption sites. Thus, the competition with hydrocarbon molecules in the exhaust for the adsorption sites is reduced which increases their trap efficiency. The stabilized H-ZSM-5 is the zeolite that showed the best performance with a propene offset temperature of 240 °C, which should be high enough for the three-way catalyst to carry out its role as catalytic converter.

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1364517815
Document Type :
Electronic Resource