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The Impact of Lanth...
The Impact of Lanthanum and Zeolite Structure on Hydrocarbon Storage
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- Jonsson, Rasmus, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ho, Hoang Phuoc, 1983 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wang, Aiyong, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Skoglundh, Magnus, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olsson, Louise, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2021-05-15
- 2021
- Engelska.
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Ingår i: Catalysts. - : MDPI AG. - 2073-4344. ; 11:5
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://www.mdpi.com...
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https://research.cha...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Hydrocarbon traps can be used to bridge the temperature gap from the cold start of a vehicle until the exhaust after-treatment catalyst has reached its operating temperature. In this work, we investigate the effect of zeolite structure (ZSM-5, BEA, SSZ-13) and the effect of La addition to H-BEA and H-ZSM-5 on the hydrocarbon storage capacity by temperature-programmed desorption and DRIFT spectroscopy. The results show that the presence of La has a significant effect on the adsorption characteristics of toluene on the BEA-supported La materials. A low loading of La onto zeolite BEA (2% La-BEA) improves not only the toluene adsorption capacity but also the retention of toluene. However, a higher loading of La results in a decrease in the adsorbed amount of toluene, which likely is due to partial blocking of the pore of the support. High loadings of La in BEA result in a contraction of the unit cell of the zeolite as evidenced by XRD. A synergetic effect of having simultaneously different types of hydrocarbons (toluene, propene, and propane) in the feed is found for samples containing ZSM-5, where the desorption temperature of propane increases, and the quantity that desorbed increases by a factor of four. This is found to be due to the interaction between toluene and propane inside the structure of the zeolite.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
Nyckelord
- cold start
- lanthanum
- toluene
- zeolite
- HC trap
- gasoline
- La-BEA
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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