FT-IR Spectroscopic Studies of Hydrocarbon Trapping in Ag+-ZSM-5 for Gasoline Engines under Cold-Start Conditions Full article
Journal |
Applied Catalysis B: Environmental
ISSN: 0926-3373 , E-ISSN: 1873-3883 |
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Output data | Year: 2001, Volume: 35, Number: 2, Pages: 125-136 Pages count : 12 DOI: 10.1016/S0926-3373(01)00247-8 | ||||
Tags | Ag-ZSM-5, Cold-start, FT-IR, Hydrocarbon trap, Propylene, Toluene | ||||
Authors |
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Abstract:
A detailed study of adsorption of automobile exhaust hydrocarbons in Ag+-exchanged zeolites under cold-start conditions (room temperature and in the presence of water) was carried out with FT-IR spectroscopy, using toluene and propylene as probes. The results show that exchanged Ag+ in zeolites is unique for trapping olefin and aromatic hydrocarbons due to its resistance to water adsorption. In contrast, exchanged Cu2+ in zeolites, which has good hydrocarbon trapping properties under dry conditions, does not trap hydrocarbons under wet conditions. Here, solvation of Cu2+ screens the interactions of the cation with adsorbed hydrocarbons. The results also show that, in addition to the nature of the cation, the structure of the zeolite also plays a role in hydrocarbon trapping. Aging at high temperatures, with water vapor (∼10%) and SO2 (∼15 ppm), leads to a decrease of the trapping centers in the zeolites due to framework dealumination.
Cite:
Liu X.
, Lampert J.K.
, Arendarskii D.A.
, Farrauto R.J.
FT-IR Spectroscopic Studies of Hydrocarbon Trapping in Ag+-ZSM-5 for Gasoline Engines under Cold-Start Conditions
Applied Catalysis B: Environmental. 2001. V.35. N2. P.125-136. DOI: 10.1016/S0926-3373(01)00247-8 WOS Scopus РИНЦ
FT-IR Spectroscopic Studies of Hydrocarbon Trapping in Ag+-ZSM-5 for Gasoline Engines under Cold-Start Conditions
Applied Catalysis B: Environmental. 2001. V.35. N2. P.125-136. DOI: 10.1016/S0926-3373(01)00247-8 WOS Scopus РИНЦ
Dates:
Submitted: | Apr 9, 2001 |
Accepted: | Jul 29, 2001 |
Published online: | Nov 20, 2001 |
Published print: | Dec 28, 2001 |
Identifiers:
Web of science | WOS:000172594800005 |
Scopus | 2-s2.0-0035965933 |
Elibrary | 13374875 |
Chemical Abstracts | 2001:861363 |
Chemical Abstracts (print) | 136:188267 |
OpenAlex | W2055966565 |