Non-thermal plasma enhanced NSR performance over Pt/M/Ba/Al2O3 (M = Mn, Co, Cu) catalysts

Zhifeng Bai; Zhaoshun Zhang; Bingbing Chen; Qi Zhao; Mark Crocker; Chuan Shi

doi:10.1016/j.cej.2016.12.034

Non-thermal plasma enhanced NSR performance over Pt/M/Ba/Al₂O₃ (M = Mn, Co, Cu) catalysts

Zhifeng Bai, Zhaoshun Zhang, Bingbing Chen, Qi Zhao, Mark Crocker, Chuan Shi

Chemistry

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

To improve the NO_xstorage capacity (NSC) of lean NO_xtrap (LNT) catalysts of the Pt/BaO/Al₂O₃type, the catalyst was doped with redox active transition metals of Mn, Co, or Cu, respectively. Due to differences in the chemical states of the doped metals, the catalysts exhibited different catalytic behaviors. Co and Mn doped catalysts showed improved NO to NO₂oxidation ability, and therefore enhanced NO_xstorage capacities, which led to the increased cycle averaged NO_xconversions as compared to a Pt/Ba/Al₂O₃reference. However, being limited by NO_xreduction in rich phase, the NO_xconversions were still poor at low temperatures (<250 °C). By employing an H₂-plasma in rich phase to assist NO_xreduction, NO_xconversions were greatly enhanced especially for low temperatures (⩽250 °C). The best properties were achieved over Pt/Co/Ba/Al₂O₃catalyst which exhibited NO_xconversions higher than 80% in the whole temperature range (150–350 °C) and best SO₂resistance abilities.

Original language	English
Pages (from-to)	688-699
Number of pages	12
Journal	Chemical Engineering Journal
Volume	314
DOIs	https://doi.org/10.1016/j.cej.2016.12.034
State	Published - 2017

Bibliographical note

Funding Information:
The work was supported by the National Natural Foundation of China (Nos. 21373037, 21577013), the Fundamental Research Funds for the Central Universities (No. DUT15TD49 and DUT16ZD224). MC thanks the National Science Foundation and the U.S. Department of Energy (DOE) under award no. CBET-1258742. However, any opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the DOE.

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

NOstorage-reduction
Non-thermal plasma
Transition metal oxide

ASJC Scopus subject areas

Chemistry (all)
Environmental Chemistry
Chemical Engineering (all)
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.cej.2016.12.034

Cite this

@article{d9c7e795de974077847d4193805f8d95,

title = "Non-thermal plasma enhanced NSR performance over Pt/M/Ba/Al2O3 (M = Mn, Co, Cu) catalysts",

abstract = "To improve the NOxstorage capacity (NSC) of lean NOxtrap (LNT) catalysts of the Pt/BaO/Al2O3type, the catalyst was doped with redox active transition metals of Mn, Co, or Cu, respectively. Due to differences in the chemical states of the doped metals, the catalysts exhibited different catalytic behaviors. Co and Mn doped catalysts showed improved NO to NO2oxidation ability, and therefore enhanced NOxstorage capacities, which led to the increased cycle averaged NOxconversions as compared to a Pt/Ba/Al2O3reference. However, being limited by NOxreduction in rich phase, the NOxconversions were still poor at low temperatures (<250 °C). By employing an H2-plasma in rich phase to assist NOxreduction, NOxconversions were greatly enhanced especially for low temperatures (⩽250 °C). The best properties were achieved over Pt/Co/Ba/Al2O3catalyst which exhibited NOxconversions higher than 80% in the whole temperature range (150–350 °C) and best SO2resistance abilities.",

keywords = "NOstorage-reduction, Non-thermal plasma, Transition metal oxide",

author = "Zhifeng Bai and Zhaoshun Zhang and Bingbing Chen and Qi Zhao and Mark Crocker and Chuan Shi",

note = "Funding Information: The work was supported by the National Natural Foundation of China (Nos. 21373037, 21577013), the Fundamental Research Funds for the Central Universities (No. DUT15TD49 and DUT16ZD224). MC thanks the National Science Foundation and the U.S. Department of Energy (DOE) under award no. CBET-1258742. However, any opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the DOE. Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.cej.2016.12.034",

language = "English",

volume = "314",

pages = "688--699",

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T1 - Non-thermal plasma enhanced NSR performance over Pt/M/Ba/Al2O3 (M = Mn, Co, Cu) catalysts

AU - Bai, Zhifeng

AU - Zhang, Zhaoshun

AU - Chen, Bingbing

AU - Zhao, Qi

AU - Crocker, Mark

AU - Shi, Chuan

N1 - Funding Information: The work was supported by the National Natural Foundation of China (Nos. 21373037, 21577013), the Fundamental Research Funds for the Central Universities (No. DUT15TD49 and DUT16ZD224). MC thanks the National Science Foundation and the U.S. Department of Energy (DOE) under award no. CBET-1258742. However, any opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the DOE. Publisher Copyright: © 2016 Elsevier B.V.

PY - 2017

Y1 - 2017

N2 - To improve the NOxstorage capacity (NSC) of lean NOxtrap (LNT) catalysts of the Pt/BaO/Al2O3type, the catalyst was doped with redox active transition metals of Mn, Co, or Cu, respectively. Due to differences in the chemical states of the doped metals, the catalysts exhibited different catalytic behaviors. Co and Mn doped catalysts showed improved NO to NO2oxidation ability, and therefore enhanced NOxstorage capacities, which led to the increased cycle averaged NOxconversions as compared to a Pt/Ba/Al2O3reference. However, being limited by NOxreduction in rich phase, the NOxconversions were still poor at low temperatures (<250 °C). By employing an H2-plasma in rich phase to assist NOxreduction, NOxconversions were greatly enhanced especially for low temperatures (⩽250 °C). The best properties were achieved over Pt/Co/Ba/Al2O3catalyst which exhibited NOxconversions higher than 80% in the whole temperature range (150–350 °C) and best SO2resistance abilities.

AB - To improve the NOxstorage capacity (NSC) of lean NOxtrap (LNT) catalysts of the Pt/BaO/Al2O3type, the catalyst was doped with redox active transition metals of Mn, Co, or Cu, respectively. Due to differences in the chemical states of the doped metals, the catalysts exhibited different catalytic behaviors. Co and Mn doped catalysts showed improved NO to NO2oxidation ability, and therefore enhanced NOxstorage capacities, which led to the increased cycle averaged NOxconversions as compared to a Pt/Ba/Al2O3reference. However, being limited by NOxreduction in rich phase, the NOxconversions were still poor at low temperatures (<250 °C). By employing an H2-plasma in rich phase to assist NOxreduction, NOxconversions were greatly enhanced especially for low temperatures (⩽250 °C). The best properties were achieved over Pt/Co/Ba/Al2O3catalyst which exhibited NOxconversions higher than 80% in the whole temperature range (150–350 °C) and best SO2resistance abilities.

KW - NOstorage-reduction

KW - Non-thermal plasma

KW - Transition metal oxide

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