Limited Pd-doped Mn spinel catalysts for efficient reduction of NO in flue gases by hydrogen

Li, Tingting; Xu, Chaochao; Cai, Xuanxuan; Sun, Wei; Cao, Limei; Yang, Ji

doi:10.1007/s11164-017-3064-7

Cited by 1 publication

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“…However, at temperatures below 500 °C, the formation of H 2 from H 2 S decomposition is limited, , and NH 3 cannot efficiently reduce NO to N 2 , resulting in the low NO removal efficiencies. At high temperatures, the formation of H 2 from H 2 S decomposition is promoted, and both NH 3 and H 2 efficiently reduce NO to N 2 , , leading to the high NO removal efficiency. Figure shows that at 700 °C, N 2 became the dominant product of NO removal (84%), and the NH 3 concentration decreased to 32 ppm, accompanied by the formation of 60 ppm of H 2 .…”

Section: Resultsmentioning

confidence: 99%

Biological Sulfur Reduction To Generate H₂S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO₂ and NO and Sulfur Recovery from Flue Gas

Sun

Zhou

et al. 2018

Environ. Sci. Technol.

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The conventional flue gas treatment technologies require high capital investments and chemical costs, which limit their application in industrial sectors. This study developed a sulfur-cycling technology to integrate sulfide production by biological sulfur reduction and simultaneous catalytic desulfurization and denitrification with HS (HS-SCDD) for flue gas treatment and sulfur recovery. In a packed bed reactor, high-rate sulfide production (1.63 ± 0.16 kg S/m-d) from biological sulfur reduction was achieved using organics in wastewater as electron donors at pH around 5.8. 93% of sulfide in wastewater was stripped out as HS, which can be a low-cost reducing agent in the HS-SCDD process. Over 90% of both SO and NO were removed by the HS-SCDD process under the test conditions, resulting in the formation of sulfur. 88% of the input S (HS and SO) were recovered as octasulfur with high purity. Besides partial recycling to produce biogenic sulfide, excessive sulfur can be obtained as a sellable product. The integrated sulfur-cycling technology is a chemical-saving and even profitable solution to the flue gas treatment in industrial sectors with wastewater available.

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Section: Resultsmentioning

confidence: 99%

Biological Sulfur Reduction To Generate H₂S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO₂ and NO and Sulfur Recovery from Flue Gas

Sun

Zhou

et al. 2018

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Limited Pd-doped Mn spinel catalysts for efficient reduction of NO in flue gases by hydrogen

Cited by 1 publication

References 31 publications

Biological Sulfur Reduction To Generate H₂S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO₂ and NO and Sulfur Recovery from Flue Gas

Biological Sulfur Reduction To Generate H₂S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO₂ and NO and Sulfur Recovery from Flue Gas

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Limited Pd-doped Mn spinel catalysts for efficient reduction of NO in flue gases by hydrogen

Cited by 1 publication

References 31 publications

Biological Sulfur Reduction To Generate H2S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO2 and NO and Sulfur Recovery from Flue Gas

Biological Sulfur Reduction To Generate H2S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO2 and NO and Sulfur Recovery from Flue Gas

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Biological Sulfur Reduction To Generate H₂S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO₂ and NO and Sulfur Recovery from Flue Gas

Biological Sulfur Reduction To Generate H₂S As a Reducing Agent To Achieve Simultaneous Catalytic Removal of SO₂ and NO and Sulfur Recovery from Flue Gas