TY - JOUR
T1 - A copper-impregnated BEA zeolite for adsorption and oxidation of aromatic species during vehicle cold starts
AU - Jang, Eunhee
AU - Choi, Layoung
AU - Kim, Jinseong
AU - Jeong, Yanghwan
AU - Baik, Hionsuck
AU - Kang, Chun Yong
AU - Kim, Chang Hwan
AU - Lee, Kwan Young
AU - Choi, Jungkyu
N1 - Funding Information:
This research was supported by the Super Ultra Low Energy and Emission Vehicle Engineering Research Center (SULEEV ERC) ( 2016R1A5A1009592 ) through the National Research Foundation of Korea (NRF) funded by the Korea Government (Ministry of Science and ICT; MSIT) . Some SEM and TEM characterizations were conducted at the Seoul Center in the Korea Basic Science Institute (KBSI).
Funding Information:
This research was supported by the Super Ultra Low Energy and Emission Vehicle Engineering Research Center (SULEEV ERC) (2016R1A5A1009592) through the National Research Foundation of Korea (NRF) funded by the Korea Government (Ministry of Science and ICT; MSIT). Some SEM and TEM characterizations were conducted at the Seoul Center in the Korea Basic Science Institute (KBSI).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/6/15
Y1 - 2021/6/15
N2 - In this study, we prepared an effective cold-start hydrocarbon (HC) trap by impregnating BEA zeolites with copper. The resulting Cu-impregnated BEA zeolites allowed for effective HC trapping and, more desirably, low-temperature HC oxidation. An optimal Cu content (∼5 wt%) resulted in the highest cold-start test (CST) performance with respect to two representatives HCs, propene and toluene. The preferential adsorption of propene under wet conditions was key to achieving high efficiency (∼79 %). We found that the presence of Cu+ ions allowed the preferential adsorption of HCs, especially propene, and the CuO particles on the exterior surface (∼1−2 nm in size) could oxidize HCs at low temperatures (starting from ∼210 °C). Finally, a severe hydrothermal treatment at 800 °C was used to simulate long-term driving; the CST performance revealed that the adsorption ability for propene was dramatically decreased, whereas those of toluene, along with the oxidation ability, were still preserved.
AB - In this study, we prepared an effective cold-start hydrocarbon (HC) trap by impregnating BEA zeolites with copper. The resulting Cu-impregnated BEA zeolites allowed for effective HC trapping and, more desirably, low-temperature HC oxidation. An optimal Cu content (∼5 wt%) resulted in the highest cold-start test (CST) performance with respect to two representatives HCs, propene and toluene. The preferential adsorption of propene under wet conditions was key to achieving high efficiency (∼79 %). We found that the presence of Cu+ ions allowed the preferential adsorption of HCs, especially propene, and the CuO particles on the exterior surface (∼1−2 nm in size) could oxidize HCs at low temperatures (starting from ∼210 °C). Finally, a severe hydrothermal treatment at 800 °C was used to simulate long-term driving; the CST performance revealed that the adsorption ability for propene was dramatically decreased, whereas those of toluene, along with the oxidation ability, were still preserved.
KW - After-treatment
KW - Cold-start test
KW - Copper species
KW - Hydrocarbon oxidation
KW - Hydrocarbon trap
UR - http://www.scopus.com/inward/record.url?scp=85100426225&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.119951
DO - 10.1016/j.apcatb.2021.119951
M3 - Article
AN - SCOPUS:85100426225
SN - 0926-3373
VL - 287
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 119951
ER -