Simultaneous CO2 Sequestration of Korean Municipal Solid Waste Incineration Bottom Ash and Encapsulation of Heavy Metals by Accelerated Carbonation

Thriveni, Thenepalli; Ramakrishna, Ch.; Whan, Ahn Ji

doi:10.1007/978-3-030-06209-5_8

Cited by 1 publication

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“…As another common heavy metal, arsenic (As) is generally emitted as vapor-phase arsenic compounds in MSWI and ISSI flue gas, which can deactivate the V 2 O 5 –WO 3 /TiO 2 catalyst either by blocking the micropores or attacking the VO groups . The content of As in MSWI bottom ash is usually 0.12–190 mg/kg, , and the total As in the wastewater of ISSI can reach 500 times higher than the emission limit . The main forms of arsenic are trivalent arsenic (As 3+ ) and pentavalent arsenic (As 5+ ), which initially form As 2 O 3 or As 4 O 6 in the gas phase, and are then accumulated as As 2 O 5 on the catalyst surface.…”

Section: Introductionmentioning

confidence: 99%

V₂O₅–WO₃/TiO₂ Catalyst for Efficient Synergistic Control of NO_x and Chlorinated Organics: Insights into the Arsenic Effect

Long

Xue

et al. 2021

Environ. Sci. Technol.

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Municipal solid waste incineration and the iron and steel smelting industry can simultaneously discharge NO x and chlorinated organics, particularly polychlorinated dibenzo-pdioxins and polychlorinated dibenzofurans (PCDD/Fs). Synergistic control of these pollutants has been considered among the most cost-effective methods. This work combined experimental and computational methods to investigate the reaction characteristics of a catalytically synergistic approach and gives the first insight into the effect of arsenic (As) on the multipollutant conversion efficiency, synergistic reaction mechanism, and toxic byproduct distribution over a commercial V 2 O 5 −WO 3 /TiO 2 catalyst. The loaded As 2 O 3 species were shown to distinctly decrease the formation energy of an oxygen vacancy at the V−O− V site, which likely contributed to the extensive formation of more toxic polychlorinated byproducts in the synergistic reaction. The As 2 O 5 species strongly attacked neighboring VO sites forming the As−O−V bands. Such an interaction deactivated the deNO x reaction, but led to excessive NO being oxidized into NO 2 that greatly promoted the V 5+ −V 4+ redox cycle and in turn facilitated chlorobenzene (CB) oxidation. Subsequent density functional theory (DFT) calculation further reveals that both the As 2 O 3 and As 2 O 5 loadings can facilitate H 2 O adsorption on the V 2 O 5 −WO 3 /TiO 2 catalyst, leading to competitive adsorption between H 2 O and CB, and thereby deactivate the CB oxidation with water stream.

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Section: Introductionmentioning

confidence: 99%

V₂O₅–WO₃/TiO₂ Catalyst for Efficient Synergistic Control of NO_x and Chlorinated Organics: Insights into the Arsenic Effect

Long

Xue

et al. 2021

Environ. Sci. Technol.

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show abstract

Simultaneous CO2 Sequestration of Korean Municipal Solid Waste Incineration Bottom Ash and Encapsulation of Heavy Metals by Accelerated Carbonation

Cited by 1 publication

References 9 publications

V₂O₅–WO₃/TiO₂ Catalyst for Efficient Synergistic Control of NO_x and Chlorinated Organics: Insights into the Arsenic Effect

V₂O₅–WO₃/TiO₂ Catalyst for Efficient Synergistic Control of NO_x and Chlorinated Organics: Insights into the Arsenic Effect

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Simultaneous CO2 Sequestration of Korean Municipal Solid Waste Incineration Bottom Ash and Encapsulation of Heavy Metals by Accelerated Carbonation

Cited by 1 publication

References 9 publications

V2O5–WO3/TiO2 Catalyst for Efficient Synergistic Control of NOx and Chlorinated Organics: Insights into the Arsenic Effect

V2O5–WO3/TiO2 Catalyst for Efficient Synergistic Control of NOx and Chlorinated Organics: Insights into the Arsenic Effect

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V₂O₅–WO₃/TiO₂ Catalyst for Efficient Synergistic Control of NO_x and Chlorinated Organics: Insights into the Arsenic Effect

V₂O₅–WO₃/TiO₂ Catalyst for Efficient Synergistic Control of NO_x and Chlorinated Organics: Insights into the Arsenic Effect