Study of the selective catalytic reduction of NOx on an efficient Fe/HBEA zeolite catalyst for heavy duty diesel engines

Balle, Peter; Geiger, Bastian; Klukowski, D.; Pignatelli, Matias; Wohnrau, Stefan; Menzel, M.; Zirkwa, Ingo; Brunklaus, Gunther; Kureti, Sven

doi:10.1016/j.apcatb.2009.06.031

Cited by 59 publications

(38 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By contrast, Beta zeolite possesses a stronger acidity and better hydrothermal stability. 26,27 Moreover, compared with the CHA-zeolite, Beta possesses a larger pore size, which is not easily blocked by the outer oxide shell. Therefore, it can enhance the access of reactant molecules to the catalytically active centers.…”

Section: Introductionmentioning

confidence: 99%

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Liu

Zhao

et al. 2017

AIChE Journal

View full text Add to dashboard Cite

A series of core-shell structural deNO x catalysts using small-grain Beta supporting FeO x nanoparticles as the core and tunable CeO 2 thin film thickness as sheaths were designed and controllably synthesized. Their catalytic performances were tested for selective catalytic reduction of NO x with NH 3 (NH 3 -SCR). It was found that CeO 2 shell thickness plays an important role in influencing the acidity and redox properties of the catalysts. Fe-Beta@CeO 2 core-shell catalysts exhibit excellent resistance to H 2 O and SO 2 and high NO x conversion (above 90%) in the wide temperature range (225-5658C). The kinetics result indicates that the coating of CeO 2 shell significantly increases the pore diffusion resistance of Fe-Beta@CeO 2 catalysts. Furthermore, in situ DRIFT results reveal that CeO 2 shell can promote the formation of NO 2 and cis-N 2 O 2 2 species. But too thick CeO 2 shell ($20 nm) would result in the formation of inactive nitrate species, and thereby lead to a decrease of high-temperature activity of the catalysts.

show abstract

Section: Introductionmentioning

confidence: 99%

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Liu

Zhao

et al. 2017

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…Since a smaller content of sulphur was found on the S-and SWtreated parent b-zeolite washcoat than on the S-and SWtreated Pd/b-zeolite catalysts, it can be concluded that Pd increases the sulphur accumulation on catalyst material. According to Balle et al [28] only weakly adsorbed SO 2 has been found on Fe/HBEA by DRIFT studies, no sulphite or sulphate species were detected. The same kind of an effect was found in our XPS results for the Pd/b-zeolite catalyst.…”

Section: Discussionmentioning

confidence: 78%

The Effect of Sulphur and Water Treatments on the Performance of Pd/β-Zeolite Diesel Oxidation Catalysts

et al. 2011

View full text Add to dashboard Cite

Sulphur, sulphur-water, and water pretreatments were done to find out the effect of these compounds on a diesel oxidation Pd/b-zeolite catalyst and b-zeolite washcoat. After pretreatments, the samples were analysed by BET, XRF, TEM-SEM, and XPS. In addition, the activity of fresh and pretreated Pd/b-zeolite catalysts was studied utilizing the by Gasmet FT-IR in production gas analysis. Sulphur compounds (SO 2 or -SO 4 ) were found to have a deactivating effect on the activity of the studied Pd/b-zeolite catalyst.

show abstract

“…Rahkamaa-Tolonen et al [2]은 제올라이트에 기초한 촉매가 NH3-SCR 반응에 매 우 가능성이 큰 것으로 보고하였다. Fe를 포함하는 혼합 산화 물과 Fe 이온교환 촉매 특히 Fe-BEA와 Fe-ZSM-5촉매가 SCR 반응에 탁월한 활성을 나타내었으며, Fe-BEA는 다른 금속이 온교환 촉매에 비하여 우수한 활성과, N2 선택성 및 노화 특 성을 나타내었다 [7,8]. Cu 2+ 이온교환 ZSM-5 촉매는 산소 존재 하에서 암모니아에 의한 NO의 환원반응에 활성적인 촉매로 알려져 있다 [7].…”

Section: 매가 많이 연구되어 왔으며 담체로는 제올라이트 Zsm-5와unclassified

Selective Catalytic Reduction of NOx with Ammonia over Cu and Fe Promoted Zeolite Catalysts

Ha¹,

Hong²,

Choi³

et al. 2013

Clean Technology

View full text Add to dashboard Cite

:The NH3-selective catalytic reduction (SCR) reaction of NO with excess of oxygen were systematically investigated over Cu-zeolite and Fe-zeolite catalysts. Cu-zeolite and Fe-zeolite catatysts to adapt the SCR technology for mobile diesel engines were prepared by liquid ion exchange and incipient wetness impregnation of NH4-BEA and NH4-ZSM-5 zeolites. The catalysts were characterized by BET, XRD, FE-TEM (field emission transmission electron microscopy) and SEM/EDS. The SCR examinations performed under stationary conditions showed that the Cu-exchanged BEA catalyst revealed pronounced performance at low temperatures of 200-250 ℃. With respect to the Fe-zeolite catalyst, the Cu-zeolite catalyst showed a higher activity in the SCR reaction at low temperatures below 250 ℃. BEA zeolite based catalyst exhibited good activity in comparison with ZSM-5 zeolite based catalyst at low temperatures below 250 ℃.

show abstract

Study of the selective catalytic reduction of NOx on an efficient Fe/HBEA zeolite catalyst for heavy duty diesel engines

Cited by 59 publications

References 30 publications

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

The Effect of Sulphur and Water Treatments on the Performance of Pd/β-Zeolite Diesel Oxidation Catalysts

Selective Catalytic Reduction of NOx with Ammonia over Cu and Fe Promoted Zeolite Catalysts

Contact Info

Product

Resources

About

Study of the selective catalytic reduction of NOx on an efficient Fe/HBEA zeolite catalyst for heavy duty diesel engines

Cited by 59 publications

References 30 publications

Fe‐Beta@CeO2 core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NOx with NH3

Fe‐Beta@CeO2 core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NOx with NH3

The Effect of Sulphur and Water Treatments on the Performance of Pd/β-Zeolite Diesel Oxidation Catalysts

Selective Catalytic Reduction of NOx with Ammonia over Cu and Fe Promoted Zeolite Catalysts

Contact Info

Product

Resources

About

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃