2024-03-28T18:08:49Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2116192020-12-09T16:44:29Zcom_10261_35com_10261_5col_10261_288
CuH-ZSM-5 as hydrocarbon trap under cold start conditions
Navlani-García, Miriam
Puértolas Lacambra, Begoña
Lozano-Castelló, D.
Cazorla-Amorós, D.
Navarro López, María Victoria
García Martínez, Tomás
Ministerio de Medio Ambiente y Medio Rural y Marino (España)
Ministerio de Economía y Competitividad (España)
Generalitat Valenciana
Universidad de Alicante
Ministerio de Educación (España)
Hydrocarbons
Copper
Adsorption
Zeolites
Alkyls
4 figures, 1 table.-- This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science and Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/es304880b.
Cold start tests are carried out to evaluate the performance of copper-exchanged zeolites as hydrocarbon traps under simulated gasoline car exhaust gases, paying special attention to the role of copper in the performance of these zeolites. It is concluded that the partial substitution of the protons in the parent H-ZSM-5 zeolite is highly beneficial for hydrocarbon trapping due to the formation of selective adsorption sites with specific affinity for the different exhaust components. However, it is also observed that uncontrolled exchanging process conditions could lead to the presence of CuO nanoparticles in the zeolite surface, which seem to block the pore structure of the zeolite, decreasing the hydrocarbon trap efficiency. Among all the zeolites studied, the results point out that a CuH-ZSM-5 with a partial substitution of extra-framework protons by copper cations and without any detectable surface CuO nanoparticles is the zeolite that showed the best performance under simulated cold start conditions due to both the high stability and the hydrocarbon retaining capacity of this sample during the consecutive cycles.
The authors thank Spanish Ministerio de Medio Ambiente y Medio Rural y Marino (Project 331/PC08/3-13.1), as well as Spanish Ministerio de Economía y Competitividad (Projects CTQ2009-10813/PPQ and CTQ2012/31762) and Generalitat Valenciana (PROMETEO/2009/047) for financial support. M.N.-G. thanks the University of Alicante for a Ph.D. fellowship, and B.P. thanks the Ministry of Education of Spain for FPU grant (FPU grant AP2009-3544).
2020-05-19T10:10:55Z
2020-05-19T10:10:55Z
2013-05-22
2020-05-19T10:10:55Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1021/es304880b
issn: 0013-936X
e-issn: 1520-5851
Environmental Science and Technology 47(11): 5851-5857 (2013)
http://hdl.handle.net/10261/211619
10.1021/es304880b
http://dx.doi.org/10.13039/501100003359
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/100009092
http://dx.doi.org/10.13039/501100014211
Postprint
http://dx.doi.org/10.1021/es304880b
Sí
open
American Chemical Society