Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg0 and NO from coal-fired utility flue gases using SCR catalysts

Sheng Hsuan Hsiao; Chun Hsiang Chiu; Hong Ping Lin; Shiao Shing Chen; Tien Chin Chang; Hsing Cheng Hsi

Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg⁰ and NO from coal-fired utility flue gases using SCR catalysts

Sheng Hsuan Hsiao
, Chun Hsiang Chiu
, Hong Ping Lin
, Shiao Shing Chen
, Tien Chin Chang
, Hsing Cheng Hsi

Graduate Institute of Environmental Engineering and Management

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

This research investigated the effects of manganese oxide (MnO_x) impregnation on the physical/chemical properties and simultaneous control of Hg⁰ and NO using a V₂O₅-WO₃/TiO₂-SiO₂ selective catalytic reduction (SCR) catalyst. Raw and MnO_x-treated SCR samples were bean-shaped nanoparticles with sizes of 10-30 nm. The decrease in surface area when the impregnated MnO_x amount was 10 wt% may stem from the particle growth or aggregation for SCR catalyst. Mn⁴⁺ was the main valence state of impregnated MnO_x. MnO_x impregnation enhanced the removal of Hg⁰, NO, and SO₂ with SCR catalyst. The 5 and 10% MnO_x-impregnated samples had the greatest multipollutant control potentials for removing Hg⁰ and NO; however, the increasing SO₂ removal that may be due to SO₂-SO₃ conversion should be concerned. HCl and O₂ greatly promoted Hg⁰ oxidation. SO₂ enhanced Hg⁰ oxidation at ≤200 ppm while NO and NH₃ consistently inhibited Hg⁰ oxidation. Elevating flue gas temperature enhanced Hg⁰ oxidation. Overall, MnO_x-impregnated catalyst shows stable and consistent multipollutant removal effectiveness.

Original language	English
Title of host publication	108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots
Subtitle of host publication	Environmental Quality to Climate
Publisher	Air and Waste Management Association
Pages	397-403
Number of pages	7
ISBN (Electronic)	9781510815582
State	Published - 2015
Event	108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015 - Raleigh, United States Duration: 22 Jun 2015 → 25 Jun 2015

Publication series

Name	Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA
Volume	1
ISSN (Print)	1052-6102

Conference

Conference	108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015
Country/Territory	United States
City	Raleigh
Period	22/06/15 → 25/06/15

Bibliographical note

Funding Information:
Financial supports by the Ministry of Science and Technology and the Environmental Protection Administration, Taiwan under grant nos. MOST100-2221-E-002-256-MY3 and 102-EPA-F-001-001 are appreciated. The opinions expressed in this paper are not necessarily those of the sponsors.

Keywords

DeNOx catalyst
Elemental mercury
Glue gas composition
Manganese oxide
Multipollutant control

Cite this

Hsiao, S. H., Chiu, C. H., Lin, H. P., Chen, S. S., Chang, T. C., & Hsi, H. C. (2015). Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg⁰ and NO from coal-fired utility flue gases using SCR catalysts. In 108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots: Environmental Quality to Climate (pp. 397-403). (Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA; Vol. 1). Air and Waste Management Association.

Hsiao, Sheng Hsuan ; Chiu, Chun Hsiang ; Lin, Hong Ping et al. / Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg⁰ and NO from coal-fired utility flue gases using SCR catalysts. 108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots: Environmental Quality to Climate. Air and Waste Management Association, 2015. pp. 397-403 (Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA).

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title = "Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg0 and NO from coal-fired utility flue gases using SCR catalysts",

abstract = "This research investigated the effects of manganese oxide (MnOx) impregnation on the physical/chemical properties and simultaneous control of Hg0 and NO using a V2O5-WO3/TiO2-SiO2 selective catalytic reduction (SCR) catalyst. Raw and MnOx-treated SCR samples were bean-shaped nanoparticles with sizes of 10-30 nm. The decrease in surface area when the impregnated MnOx amount was 10 wt\% may stem from the particle growth or aggregation for SCR catalyst. Mn4+ was the main valence state of impregnated MnOx. MnOx impregnation enhanced the removal of Hg0, NO, and SO2 with SCR catalyst. The 5 and 10\% MnOx-impregnated samples had the greatest multipollutant control potentials for removing Hg0 and NO; however, the increasing SO2 removal that may be due to SO2-SO3 conversion should be concerned. HCl and O2 greatly promoted Hg0 oxidation. SO2 enhanced Hg0 oxidation at ≤200 ppm while NO and NH3 consistently inhibited Hg0 oxidation. Elevating flue gas temperature enhanced Hg0 oxidation. Overall, MnOx-impregnated catalyst shows stable and consistent multipollutant removal effectiveness.",

keywords = "DeNOx catalyst, Elemental mercury, Glue gas composition, Manganese oxide, Multipollutant control",

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note = "Funding Information: Financial supports by the Ministry of Science and Technology and the Environmental Protection Administration, Taiwan under grant nos. MOST100-2221-E-002-256-MY3 and 102-EPA-F-001-001 are appreciated. The opinions expressed in this paper are not necessarily those of the sponsors.; 108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015 ; Conference date: 22-06-2015 Through 25-06-2015",

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Hsiao, SH, Chiu, CH, Lin, HP, Chen, SS, Chang, TC & Hsi, HC 2015, Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg⁰ and NO from coal-fired utility flue gases using SCR catalysts. in 108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots: Environmental Quality to Climate. Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA, vol. 1, Air and Waste Management Association, pp. 397-403, 108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015, Raleigh, United States, 22/06/15.

Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg⁰ and NO from coal-fired utility flue gases using SCR catalysts. / Hsiao, Sheng Hsuan; Chiu, Chun Hsiang; Lin, Hong Ping et al.
108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots: Environmental Quality to Climate. Air and Waste Management Association, 2015. p. 397-403 (Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Hsiao, Sheng Hsuan

AU - Chiu, Chun Hsiang

AU - Lin, Hong Ping

AU - Chen, Shiao Shing

AU - Chang, Tien Chin

AU - Hsi, Hsing Cheng

N1 - Funding Information: Financial supports by the Ministry of Science and Technology and the Environmental Protection Administration, Taiwan under grant nos. MOST100-2221-E-002-256-MY3 and 102-EPA-F-001-001 are appreciated. The opinions expressed in this paper are not necessarily those of the sponsors.

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AB - This research investigated the effects of manganese oxide (MnOx) impregnation on the physical/chemical properties and simultaneous control of Hg0 and NO using a V2O5-WO3/TiO2-SiO2 selective catalytic reduction (SCR) catalyst. Raw and MnOx-treated SCR samples were bean-shaped nanoparticles with sizes of 10-30 nm. The decrease in surface area when the impregnated MnOx amount was 10 wt% may stem from the particle growth or aggregation for SCR catalyst. Mn4+ was the main valence state of impregnated MnOx. MnOx impregnation enhanced the removal of Hg0, NO, and SO2 with SCR catalyst. The 5 and 10% MnOx-impregnated samples had the greatest multipollutant control potentials for removing Hg0 and NO; however, the increasing SO2 removal that may be due to SO2-SO3 conversion should be concerned. HCl and O2 greatly promoted Hg0 oxidation. SO2 enhanced Hg0 oxidation at ≤200 ppm while NO and NH3 consistently inhibited Hg0 oxidation. Elevating flue gas temperature enhanced Hg0 oxidation. Overall, MnOx-impregnated catalyst shows stable and consistent multipollutant removal effectiveness.

KW - DeNOx catalyst

KW - Elemental mercury

KW - Glue gas composition

KW - Manganese oxide

KW - Multipollutant control

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Hsiao SH, Chiu CH, Lin HP, Chen SS, Chang TC, Hsi HC. Effects of manganese oxide impregnation and flue gas conditions on simultaneous control of Hg⁰ and NO from coal-fired utility flue gases using SCR catalysts. In 108th Air and Waste Management Association Annual Conference and Exhibition, ACE 2015 - Connecting the Dots: Environmental Quality to Climate. Air and Waste Management Association. 2015. p. 397-403. (Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA).