Promotion of Ag/H-BEA by Mn for lean NO reduction with propane at low temperature

Pan Hua; Su Qingfa; Chen Jie; Ye Qing; Liu Yiting; Shi Yao

doi:10.1021/es901504b

Promotion of Ag/H-BEA by Mn for lean NO reduction with propane at low temperature

Pan Hua, Su Qingfa, Chen Jie, Ye Qing, Liu Yiting, Shi Yao

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

17 Scopus citations

Abstract

Effects of adding manganese to Ag/H-BEA for selective catalytic reduction of NO_x with propane (C₃H₈-SCR) were investigated underalean-burn condition.Mnaddition significantly promotes the catalytic performance of Ag/H-BEA below 673 K. A Ag-Mn/H-BEA catalyst with equal metal weight of 3 wt % has the highest activity for C₃H ₈-SCR among samples with a different bimetal loading. Manganese is mainly present in the 3+and4+oxidation states inAg-Mn/H-BEAcatalysts.Themajor contributions of manganese suggested by the data presented in this paper are to catalyze the NO oxidation and stabilize silver in a dispersed Ag⁺ state. The presence of silver enforces the transformation of a certain amount of Mn³⁺ ions to Mn⁴⁺ ions. The activity of Ag-Mn/H-BEA decreases slightly at low SO₂ concentrations (0-200 ppm) but decreases significantly at high SO₂ concentrations (400-800 ppm). In the presence of 10% H₂O and 200 ppm SO₂, the inhibition of C₃H₈-SCR below 673 K is more significant than that at high temperature above 673 K. Ag-Mn/H-BEA is a promising catalyst for the removal of NO_x from diesel engine exhaust.

Original language	English
Pages (from-to)	9348-9353
Number of pages	6
Journal	Environmental Science and Technology
Volume	43
Issue number	24
DOIs	https://doi.org/10.1021/es901504b
State	Published - 15 Dec 2009
Externally published	Yes

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title = "Promotion of Ag/H-BEA by Mn for lean NO reduction with propane at low temperature",

abstract = "Effects of adding manganese to Ag/H-BEA for selective catalytic reduction of NOx with propane (C3H8-SCR) were investigated underalean-burn condition.Mnaddition significantly promotes the catalytic performance of Ag/H-BEA below 673 K. A Ag-Mn/H-BEA catalyst with equal metal weight of 3 wt % has the highest activity for C3H 8-SCR among samples with a different bimetal loading. Manganese is mainly present in the 3+and4+oxidation states inAg-Mn/H-BEAcatalysts.Themajor contributions of manganese suggested by the data presented in this paper are to catalyze the NO oxidation and stabilize silver in a dispersed Ag+ state. The presence of silver enforces the transformation of a certain amount of Mn3+ ions to Mn4+ ions. The activity of Ag-Mn/H-BEA decreases slightly at low SO2 concentrations (0-200 ppm) but decreases significantly at high SO2 concentrations (400-800 ppm). In the presence of 10% H2O and 200 ppm SO2, the inhibition of C3H8-SCR below 673 K is more significant than that at high temperature above 673 K. Ag-Mn/H-BEA is a promising catalyst for the removal of NOx from diesel engine exhaust.",

author = "Pan Hua and Su Qingfa and Chen Jie and Ye Qing and Liu Yiting and Shi Yao",

year = "2009",

month = dec,

day = "15",

doi = "10.1021/es901504b",

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pages = "9348--9353",

journal = "Environmental Science and Technology",

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T1 - Promotion of Ag/H-BEA by Mn for lean NO reduction with propane at low temperature

AU - Hua, Pan

AU - Qingfa, Su

AU - Jie, Chen

AU - Qing, Ye

AU - Yiting, Liu

AU - Yao, Shi

PY - 2009/12/15

Y1 - 2009/12/15

N2 - Effects of adding manganese to Ag/H-BEA for selective catalytic reduction of NOx with propane (C3H8-SCR) were investigated underalean-burn condition.Mnaddition significantly promotes the catalytic performance of Ag/H-BEA below 673 K. A Ag-Mn/H-BEA catalyst with equal metal weight of 3 wt % has the highest activity for C3H 8-SCR among samples with a different bimetal loading. Manganese is mainly present in the 3+and4+oxidation states inAg-Mn/H-BEAcatalysts.Themajor contributions of manganese suggested by the data presented in this paper are to catalyze the NO oxidation and stabilize silver in a dispersed Ag+ state. The presence of silver enforces the transformation of a certain amount of Mn3+ ions to Mn4+ ions. The activity of Ag-Mn/H-BEA decreases slightly at low SO2 concentrations (0-200 ppm) but decreases significantly at high SO2 concentrations (400-800 ppm). In the presence of 10% H2O and 200 ppm SO2, the inhibition of C3H8-SCR below 673 K is more significant than that at high temperature above 673 K. Ag-Mn/H-BEA is a promising catalyst for the removal of NOx from diesel engine exhaust.

AB - Effects of adding manganese to Ag/H-BEA for selective catalytic reduction of NOx with propane (C3H8-SCR) were investigated underalean-burn condition.Mnaddition significantly promotes the catalytic performance of Ag/H-BEA below 673 K. A Ag-Mn/H-BEA catalyst with equal metal weight of 3 wt % has the highest activity for C3H 8-SCR among samples with a different bimetal loading. Manganese is mainly present in the 3+and4+oxidation states inAg-Mn/H-BEAcatalysts.Themajor contributions of manganese suggested by the data presented in this paper are to catalyze the NO oxidation and stabilize silver in a dispersed Ag+ state. The presence of silver enforces the transformation of a certain amount of Mn3+ ions to Mn4+ ions. The activity of Ag-Mn/H-BEA decreases slightly at low SO2 concentrations (0-200 ppm) but decreases significantly at high SO2 concentrations (400-800 ppm). In the presence of 10% H2O and 200 ppm SO2, the inhibition of C3H8-SCR below 673 K is more significant than that at high temperature above 673 K. Ag-Mn/H-BEA is a promising catalyst for the removal of NOx from diesel engine exhaust.

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DO - 10.1021/es901504b

M3 - 文章

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JO - Environmental Science and Technology

JF - Environmental Science and Technology

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Promotion of Ag/H-BEA by Mn for lean NO reduction with propane at low temperature

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