Catalytic formaldehyde removal by " storage-oxidation" cycling process over supported silver catalysts

Chuan Shi; Bing Bing Chen; Xiao Song Li; Mark Crocker; Yu Wang; Ai Min Zhu

doi:10.1016/j.cej.2012.06.103

Catalytic formaldehyde removal by " storage-oxidation" cycling process over supported silver catalysts

Chuan Shi, Bing Bing Chen, Xiao Song Li, Mark Crocker, Yu Wang, Ai Min Zhu

Chemistry

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

112 Scopus citations

Abstract

Catalytic removal of indoor HCHO was proposed to proceed in a " storage-oxidation" cycling process. Two kinds of supported silver catalysts, namely Ag/HZSM-5 and Ag-MnO_x-CeO_2, were investigated as catalysts for this cycling process. Due to the highly dispersed silver clusters formed and its good redox properties, the Ag-MnO_x-CeO₂ catalyst showed better HCHO oxidation properties in both the storage phase (HCHO partial oxidation to HCOO^- at room temperature) and oxidation-regeneration phase (total oxidation of the formates into CO₂ and H₂O at elevated temperatures). The presence of H₂O (RH=50%, 25°C) was found to enhance the HCHO storage capacity for Ag-MnO_x-CeO₂ catalyst, while competitive adsorption of HCHO with H₂O was observed over Ag/HZ catalyst. The results of DRIFTS indicate that the partial oxidation of HCHO into HCOO^- is accelerated by the presence of H₂O over the Ag-MnO_x-CeO₂ catalyst. In addition, the catalyst saturated with HCHO can be in situ regenerated without production of secondary pollutants and can be used repeatly. It is suggested that this is a promising approach for indoor HCHO elimination.

Original language	English
Pages (from-to)	729-737
Number of pages	9
Journal	Chemical Engineering Journal
Volume	200-202
DOIs	https://doi.org/10.1016/j.cej.2012.06.103
State	Published - Aug 15 2012

Bibliographical note

Funding Information:
The work was supported by the National Natural Science Foundation of China (No. 20573014 and 21073024), Natural Science Foundation of Liaoning Province (No. 201102034) and by the Program for New Century Excellent Talents in University (NCET-07-0136), as well as by the Fundamental Research Funds for the Central Universities (No. DUT12LK23).

Keywords

Catalytic oxidation
Formaldehyde
Silver catalysts
Storage

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cej.2012.06.103

Cite this

@article{5b21023fb12a41ebaea2732cdac214b5,

title = "Catalytic formaldehyde removal by {"} storage-oxidation{"} cycling process over supported silver catalysts",

abstract = "Catalytic removal of indoor HCHO was proposed to proceed in a {"} storage-oxidation{"} cycling process. Two kinds of supported silver catalysts, namely Ag/HZSM-5 and Ag-MnOx-CeO2, were investigated as catalysts for this cycling process. Due to the highly dispersed silver clusters formed and its good redox properties, the Ag-MnOx-CeO2 catalyst showed better HCHO oxidation properties in both the storage phase (HCHO partial oxidation to HCOO- at room temperature) and oxidation-regeneration phase (total oxidation of the formates into CO2 and H2O at elevated temperatures). The presence of H2O (RH=50%, 25°C) was found to enhance the HCHO storage capacity for Ag-MnOx-CeO2 catalyst, while competitive adsorption of HCHO with H2O was observed over Ag/HZ catalyst. The results of DRIFTS indicate that the partial oxidation of HCHO into HCOO- is accelerated by the presence of H2O over the Ag-MnOx-CeO2 catalyst. In addition, the catalyst saturated with HCHO can be in situ regenerated without production of secondary pollutants and can be used repeatly. It is suggested that this is a promising approach for indoor HCHO elimination.",

keywords = "Catalytic oxidation, Formaldehyde, Silver catalysts, Storage",

author = "Chuan Shi and Chen, {Bing Bing} and Li, {Xiao Song} and Mark Crocker and Yu Wang and Zhu, {Ai Min}",

note = "Funding Information: The work was supported by the National Natural Science Foundation of China (No. 20573014 and 21073024), Natural Science Foundation of Liaoning Province (No. 201102034) and by the Program for New Century Excellent Talents in University (NCET-07-0136), as well as by the Fundamental Research Funds for the Central Universities (No. DUT12LK23). ",

year = "2012",

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doi = "10.1016/j.cej.2012.06.103",

language = "English",

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pages = "729--737",

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TY - JOUR

T1 - Catalytic formaldehyde removal by " storage-oxidation" cycling process over supported silver catalysts

AU - Shi, Chuan

AU - Chen, Bing Bing

AU - Li, Xiao Song

AU - Crocker, Mark

AU - Wang, Yu

AU - Zhu, Ai Min

N1 - Funding Information: The work was supported by the National Natural Science Foundation of China (No. 20573014 and 21073024), Natural Science Foundation of Liaoning Province (No. 201102034) and by the Program for New Century Excellent Talents in University (NCET-07-0136), as well as by the Fundamental Research Funds for the Central Universities (No. DUT12LK23).

PY - 2012/8/15

Y1 - 2012/8/15

N2 - Catalytic removal of indoor HCHO was proposed to proceed in a " storage-oxidation" cycling process. Two kinds of supported silver catalysts, namely Ag/HZSM-5 and Ag-MnOx-CeO2, were investigated as catalysts for this cycling process. Due to the highly dispersed silver clusters formed and its good redox properties, the Ag-MnOx-CeO2 catalyst showed better HCHO oxidation properties in both the storage phase (HCHO partial oxidation to HCOO- at room temperature) and oxidation-regeneration phase (total oxidation of the formates into CO2 and H2O at elevated temperatures). The presence of H2O (RH=50%, 25°C) was found to enhance the HCHO storage capacity for Ag-MnOx-CeO2 catalyst, while competitive adsorption of HCHO with H2O was observed over Ag/HZ catalyst. The results of DRIFTS indicate that the partial oxidation of HCHO into HCOO- is accelerated by the presence of H2O over the Ag-MnOx-CeO2 catalyst. In addition, the catalyst saturated with HCHO can be in situ regenerated without production of secondary pollutants and can be used repeatly. It is suggested that this is a promising approach for indoor HCHO elimination.

AB - Catalytic removal of indoor HCHO was proposed to proceed in a " storage-oxidation" cycling process. Two kinds of supported silver catalysts, namely Ag/HZSM-5 and Ag-MnOx-CeO2, were investigated as catalysts for this cycling process. Due to the highly dispersed silver clusters formed and its good redox properties, the Ag-MnOx-CeO2 catalyst showed better HCHO oxidation properties in both the storage phase (HCHO partial oxidation to HCOO- at room temperature) and oxidation-regeneration phase (total oxidation of the formates into CO2 and H2O at elevated temperatures). The presence of H2O (RH=50%, 25°C) was found to enhance the HCHO storage capacity for Ag-MnOx-CeO2 catalyst, while competitive adsorption of HCHO with H2O was observed over Ag/HZ catalyst. The results of DRIFTS indicate that the partial oxidation of HCHO into HCOO- is accelerated by the presence of H2O over the Ag-MnOx-CeO2 catalyst. In addition, the catalyst saturated with HCHO can be in situ regenerated without production of secondary pollutants and can be used repeatly. It is suggested that this is a promising approach for indoor HCHO elimination.

KW - Catalytic oxidation

KW - Formaldehyde

KW - Silver catalysts

KW - Storage

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JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Catalytic formaldehyde removal by " storage-oxidation" cycling process over supported silver catalysts

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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