Adsorption/desorption of NOx on MnO2/ZrO2 oxides prepared in reverse microemulsions

W. B. Li; X. F. Yang; L. F. Chen; J. A. Wang

doi:10.1016/j.cattod.2009.03.028

Adsorption/desorption of NOx on MnO₂/ZrO₂ oxides prepared in reverse microemulsions

W. B. Li, X. F. Yang, L. F. Chen, J. A. Wang

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

35 Scopus citations

Abstract

A series of MnO₂/ZrO₂ mixed oxides were prepared in reverse microemulsions for NOx adsorption and abatement. The results show that the amount of NOx adsorbed was increased with increasing MnO₂ content in various MnO₂/ZrO₂ samples. The maximum uptake value of NOx was 27.66 mg NOx/g adsorbent on the 40% Mn-Zr sample at 200 °C with NOx initial adsorption rate as 2.63 mg/(g adsorbent min). TPD results show that the complete desorption of NOx was easily obtained by heating the sample to 450 °C, and the temperature for the complete desorption can be further decreased to 210 °C by adding carbon monoxide into the argon desorption streams. Furthermore, water vapor was found to reduce NOx adsorption capacity because of its stronger competitive adsorption with NOx species. It is noteworthy that a small amount of sulfur dioxide could significantly increase the initial rate of NOx adsorption although it slightly decreased the NOx adsorption capacity.

Original language	English
Pages (from-to)	75-80
Number of pages	6
Journal	Catalysis Today
Volume	148
Issue number	1-2
DOIs	https://doi.org/10.1016/j.cattod.2009.03.028
State	Published - 30 Oct 2010
Externally published	Yes

Keywords

Adsorption
Manganese oxide
Microemulsion
NOx
Zirconia

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10.1016/j.cattod.2009.03.028

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title = "Adsorption/desorption of NOx on MnO2/ZrO2 oxides prepared in reverse microemulsions",

abstract = "A series of MnO2/ZrO2 mixed oxides were prepared in reverse microemulsions for NOx adsorption and abatement. The results show that the amount of NOx adsorbed was increased with increasing MnO2 content in various MnO2/ZrO2 samples. The maximum uptake value of NOx was 27.66 mg NOx/g adsorbent on the 40% Mn-Zr sample at 200 °C with NOx initial adsorption rate as 2.63 mg/(g adsorbent min). TPD results show that the complete desorption of NOx was easily obtained by heating the sample to 450 °C, and the temperature for the complete desorption can be further decreased to 210 °C by adding carbon monoxide into the argon desorption streams. Furthermore, water vapor was found to reduce NOx adsorption capacity because of its stronger competitive adsorption with NOx species. It is noteworthy that a small amount of sulfur dioxide could significantly increase the initial rate of NOx adsorption although it slightly decreased the NOx adsorption capacity.",

keywords = "Adsorption, Manganese oxide, Microemulsion, NOx, Zirconia",

author = "Li, {W. B.} and Yang, {X. F.} and Chen, {L. F.} and Wang, {J. A.}",

note = "Funding Information: The financial supports by National Science Foundation of China (No. 29907003) and the National High-Tech Foundation (2001AA643030-1) are gratefully acknowledged.",

year = "2010",

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day = "30",

doi = "10.1016/j.cattod.2009.03.028",

language = "Ingl{\'e}s",

volume = "148",

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T1 - Adsorption/desorption of NOx on MnO2/ZrO2 oxides prepared in reverse microemulsions

AU - Li, W. B.

AU - Yang, X. F.

AU - Chen, L. F.

AU - Wang, J. A.

N1 - Funding Information: The financial supports by National Science Foundation of China (No. 29907003) and the National High-Tech Foundation (2001AA643030-1) are gratefully acknowledged.

PY - 2010/10/30

Y1 - 2010/10/30

N2 - A series of MnO2/ZrO2 mixed oxides were prepared in reverse microemulsions for NOx adsorption and abatement. The results show that the amount of NOx adsorbed was increased with increasing MnO2 content in various MnO2/ZrO2 samples. The maximum uptake value of NOx was 27.66 mg NOx/g adsorbent on the 40% Mn-Zr sample at 200 °C with NOx initial adsorption rate as 2.63 mg/(g adsorbent min). TPD results show that the complete desorption of NOx was easily obtained by heating the sample to 450 °C, and the temperature for the complete desorption can be further decreased to 210 °C by adding carbon monoxide into the argon desorption streams. Furthermore, water vapor was found to reduce NOx adsorption capacity because of its stronger competitive adsorption with NOx species. It is noteworthy that a small amount of sulfur dioxide could significantly increase the initial rate of NOx adsorption although it slightly decreased the NOx adsorption capacity.

AB - A series of MnO2/ZrO2 mixed oxides were prepared in reverse microemulsions for NOx adsorption and abatement. The results show that the amount of NOx adsorbed was increased with increasing MnO2 content in various MnO2/ZrO2 samples. The maximum uptake value of NOx was 27.66 mg NOx/g adsorbent on the 40% Mn-Zr sample at 200 °C with NOx initial adsorption rate as 2.63 mg/(g adsorbent min). TPD results show that the complete desorption of NOx was easily obtained by heating the sample to 450 °C, and the temperature for the complete desorption can be further decreased to 210 °C by adding carbon monoxide into the argon desorption streams. Furthermore, water vapor was found to reduce NOx adsorption capacity because of its stronger competitive adsorption with NOx species. It is noteworthy that a small amount of sulfur dioxide could significantly increase the initial rate of NOx adsorption although it slightly decreased the NOx adsorption capacity.

KW - Adsorption

KW - Manganese oxide

KW - Microemulsion

KW - NOx

KW - Zirconia

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DO - 10.1016/j.cattod.2009.03.028

M3 - Artículo

AN - SCOPUS:74249104368

SN - 0920-5861

VL - 148

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EP - 80

JO - Catalysis Today

JF - Catalysis Today

IS - 1-2

ER -

Adsorption/desorption of NOx on MnO₂/ZrO₂ oxides prepared in reverse microemulsions

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