The remarkable promotional effect of SO2 on Pb-poisoned V2O5-WO3/TiO2 catalysts: An in-depth experimental and theoretical study

Yu, Yanke; Miao, Jifa; He, Chi; Chen, Jinsheng; Li, Can; Douthwaite, Mark

doi:10.1016/j.cej.2018.01.031

Cited by 50 publications

(22 citation statements)

References 40 publications

(62 reference statements)

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“…In the tests for the samples 1Al doped and 2Al doped, the NO conversions were gradually partially recovered when SO 2 was introduced. Similar phenomena have been observed in previous metal-poisoning studies, and it was ascribed to the generations of new acidic active sites [41,42].…”

Section: Influence Of Basic Metals (Al Ca Na and K) On Catalytic Psupporting

confidence: 88%

Applicability of V2O5-WO3/TiO2 Catalysts for the SCR Denitrification of Alumina Calcining Flue Gas

Ning

Chen

et al. 2019

Catalysts

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V2O5-WO3/TiO2 catalysts with different V2O5 and WO3 loadings were prepared by the impregnation method. H2O and SO2 resistance of the catalysts under high H2O concentration (30 vol.%) was studied. Influence of various basic metal oxides, such as Al2O3, CaO, Na2O, and K2O on the catalytic performance was studied and compared. It is revealed that the inhibitory effect is in the sequence of K > Na > Ca > Al, which is consistent with their alkalinity. X-ray diffraction (XRD), N2 physisorption (BET), temperature-programmed desorption of NH3 (NH3-TPD), H2-temperature programmed reduction (H2-TPR), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) were carried out, and the results were well-correlated with the catalytic studies.

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Section: Influence Of Basic Metals (Al Ca Na and K) On Catalytic Psupporting

confidence: 88%

Applicability of V2O5-WO3/TiO2 Catalysts for the SCR Denitrification of Alumina Calcining Flue Gas

Ning

Chen

et al. 2019

Catalysts

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“…The model of TiO2 (0 0 1) surfaces was used because the stability of (0 0 1) surfaces of anatase TiO2 was the lowest and should play an important role in catalytic reaction [30]. More details could be found in our previous work [32,33].…”

Section: Calculation Methodsmentioning

confidence: 99%

SO2 promoted in situ recovery of thermally deactivated Fe2(SO4)3/TiO2 NH3-SCR catalysts: From experimental work to theoretical study

Chen

et al. 2019

Chemical Engineering Journal

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“…Recently, the combined effects of different elements in the flue gas aroused the attention of scholars. Yu et al [14,15] suggested that SO 2 in the flue gas promoted the activity of K-and Pb-poisoned catalysts. Kong et al [16] discovered that new acid sites generated on the SCR catalyst by loading HgCl 2 .…”

Section: Introductionmentioning

confidence: 99%

Poisoning Effects of Phosphorus, Potassium and Lead on V2O5-WO3/TiO2 Catalysts for Selective Catalytic Reduction with NH3

Miao

et al. 2020

Catalysts

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The poisoning effect of single elements on commercial V2O5-WO3/TiO2 catalysts has been studied in the past decades. In this study, the combined effects of two multi-element systems (phosphorus-potassium and phosphorus-lead) on V2O5-WO3/TiO2 catalysts were studied by diverse characterizations. The results show that potassium and lead can result in the deactivation of catalysts to different degrees by reacting with active acid sites and reducing the amount of V5+. However, phosphorus displays slight negative influence on the NOx conversion of the catalyst due to the comprehensive effect of reducing V5+ amount and generating new acid sites. The samples poisoned by phosphorus–potassium and phosphorus–lead have higher NOx conversion than that by potassium or lead, because doped potassium or lead atoms may react with new acid sites generated by phosphate, which liberates more V–OH on the surface of catalysts and reduces the poisoning effects of potassium or lead on vanadium species and active oxygen species.

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The remarkable promotional effect of SO2 on Pb-poisoned V2O5-WO3/TiO2 catalysts: An in-depth experimental and theoretical study

Cited by 50 publications

References 40 publications

Applicability of V2O5-WO3/TiO2 Catalysts for the SCR Denitrification of Alumina Calcining Flue Gas

Applicability of V2O5-WO3/TiO2 Catalysts for the SCR Denitrification of Alumina Calcining Flue Gas

SO2 promoted in situ recovery of thermally deactivated Fe2(SO4)3/TiO2 NH3-SCR catalysts: From experimental work to theoretical study

Poisoning Effects of Phosphorus, Potassium and Lead on V2O5-WO3/TiO2 Catalysts for Selective Catalytic Reduction with NH3

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