Effects of particulates, heavy metals and acid gas on the removals of NO and PAHs by V2O5–WO3 catalysts in waste incineration system

Chang, Fu‐Min; Chen, Jyh-Cherng; Wey, Ming‐Yen; Tsai, Shao-Pu

doi:10.1016/j.jhazmat.2009.04.105

Cited by 12 publications

(4 citation statements)

References 22 publications

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“…There are only a few papers reporting on SO 2 sensors utilizing V 2 O 5 /TiO 2 (without WO 3 ) [9,10] and there is no paper that involves VWT as an SO 2 sensitive material, although there are many papers about SO 2 oxidation of VWT in SCR catalysts [11–16]. Morris and Egdell reported on a resistive bulk-type sensor of small V 2 O 5 -TiO 2 bars with Pt electrodes [10].…”

Section: Introductionmentioning

confidence: 99%

Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors

Izu

Hagen

Schönauer

et al. 2011

Sensors

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A study on the application of V2O5/WO3/TiO2 (VWT) as the sensitive material for resistive-type SO2 sensor was conducted, based on the fact that VWT is a well-known catalyst material for good selective catalytic nitrogen oxide reduction with a proven excellent durability in exhaust gases. The sensors fabricated in this study are planar ones with interdigitated electrodes of Au or Pt. The vanadium content of the utilized VWT is 1.5 or 3.0 wt%. The resistance of VWT decreases with an increasing SO2 concentration in the range from 20 ppm to 5,000 ppm. The best sensor response to SO2 occurs at 400 °C using Au electrodes. The sensor response value is independent on the amount of added vanadium but dependent on the electrode materials at 400 °C. These results are discussed and a sensing mechanism is discussed.

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Section: Introductionmentioning

confidence: 99%

Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors

Izu

Hagen

Schönauer

et al. 2011

Sensors

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“…The inhibiting effects of SO 2 on TiO 2 ‐based V 2 O 5 /WO 3 catalytic degradation of PAHs had been researched. The results showed that SO 2 could react with active sites of the catalysts and even promote the formations of PAHs .…”

Section: Introductionmentioning

confidence: 99%

Low temperature oxidation of PCDD/Fs by TiO₂‐based V₂O₅/WO₃ catalyst

Ren

et al. 2016

Env Prog and Sustain Energy

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Catalytic oxidation of vapor phase PCDD/Fs (polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans) by V 2 O 5 -WO 3 /TiO 2 catalyst at low temperature (1808C) was studied. An innovative PCDD/Fs generating system was designed to supply stable gaseous PCDD/Fs steam with initial concentration of 5.60 ng I-TEQ Nm 23 . The effects of Gas Hourly Space Velocity (GHSV), water vapor content and sulphur-dioxide (SO 2 ) concentration on catalytic oxidation were investigated. The destruction efficiency (DE) reaches a maximum value of 76.4% with a GHSV value of 2000 h 21 .In the presence of water vapor, there are almost no changes for the RE values of PCDD/Fs. Water vapor negatively affects the destruction of PCDD/Fs. However, when 3 vol % of water vapor is introduced into the reaction system, even more PCDD/Fs are destroyed compared with the absence of water vapor. SO 2 can inhibit the destruction of PCDD/Fs by poisoning catalyst. With SO 2 concentration increasing from 0 to 250 ppm, DE value of PCDD/Fs significantly decreases from 68.6% to 38.8%.

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“…The use of biomass as a fuel or cofuel is of increasing interest because of the energy demands, especially in industrialized countries and developing countries; , however, the alkali metals (e.g., K, Na) released during biomass combustion significantly poison the conventional vanadia-based catalysts. − Our previous study has reported a ceria supported on sulfated zirconia (CeSZ) catalyst that shows excellent SCR activity and remarkable resistance toward alkali metal poisoning . The previous work also revealed an unexpected result that a small amount of potassium could somehow promote the catalytic activity at ca.…”

Section: Introductionmentioning

confidence: 99%

Effective Way to Control the Performance of a Ceria-Based DeNO_x Catalyst with Improved Alkali Resistance: Acid–Base Adjusting

Wang

Gao

et al. 2015

J. Phys. Chem. C

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Compared with V 2 O 5 −WO 3 /TiO 2 , the ceria catalyst supported on sulfated zirconia (referred to as CeSZ) shows a superior alkali resistance for selective catalytic reduction of NO in flue gases. It reveals an unexpected result that a moderate amount of potassium (normally considered as SCR poisons) could even enhance the activity of CeSZ catalyst. To investigate this exceptional phenomenon, we studied the surface acid−base properties of CeSZ catalysts with different amounts of K and their influences on SCR performances. Although K resulted in a sharp decrease in Brønsted acid sites, the total acidity, especially strong acidity, barely changed when K/Ce was less than 0.4. It was proposed that a small amount of potassium could initially alter some Brønsted acid sites to Lewis ones, therefore retaining the majority of total acidity. Moreover, increased surface basicity due to K depositing led to an enhancement in NO chemisorption and oxidation, which is beneficial to the SCR process via the reaction of NO 2 and NO x ad-species with adsorbed NH 3 species. This explains why the SCR catalytic activity was improved at lower temperature for CeSZ catalysts after K depositing. Therefore, the catalytic activity and reaction temperature window of CeSZ catalyst could be controlled by simply tuning the surface acid/base sites, which may give some inspiration to improve the catalytic activity and poisoning tolerance.

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Effects of particulates, heavy metals and acid gas on the removals of NO and PAHs by V2O5–WO3 catalysts in waste incineration system

Cited by 12 publications

References 22 publications

Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors

Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors

Low temperature oxidation of PCDD/Fs by TiO₂‐based V₂O₅/WO₃ catalyst

Effective Way to Control the Performance of a Ceria-Based DeNO_x Catalyst with Improved Alkali Resistance: Acid–Base Adjusting

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Effects of particulates, heavy metals and acid gas on the removals of NO and PAHs by V2O5–WO3 catalysts in waste incineration system

Cited by 12 publications

References 22 publications

Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors

Application of V2O5/WO3/TiO2 for Resistive-Type SO2 Sensors

Low temperature oxidation of PCDD/Fs by TiO2‐based V2O5/WO3 catalyst

Effective Way to Control the Performance of a Ceria-Based DeNOx Catalyst with Improved Alkali Resistance: Acid–Base Adjusting

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Product

Resources

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Low temperature oxidation of PCDD/Fs by TiO₂‐based V₂O₅/WO₃ catalyst

Effective Way to Control the Performance of a Ceria-Based DeNO_x Catalyst with Improved Alkali Resistance: Acid–Base Adjusting