The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Guo, Rui‐tang; Wang, Qingshan; Pan, Weiguo; Chen, Qilin; Ding, Honglei; Yin, Xiaoli; Yang, Ning-zhi; Lu, Chen-zi; Wang, Shuxian; Yuan, Yi-chao

doi:10.1016/j.molcata.2015.06.017

Cited by 70 publications

(20 citation statements)

References 38 publications

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“…Figure 6 shows the XPS results of O 1s, V 2p 3/2 , P 2p and Ti 2p. The spectra of O 1s were fitted into three peaks which are the lattice oxygen in the metal oxides (O γ ), the surface oxygen by hydroxyl species (O β ) and the absorbed oxygen or/and weakly bonded oxygen species (O α ) [21,37,38]. The positions and concentrations of oxygen species are displayed in the Table 2.…”

Section: Surface Chemical Statementioning

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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Section: Surface Chemical Statementioning

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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“…NH 3 adsorption is critical for SCR reactions, which is related to the surface acidity of the SCR catalyst [ 31 ]. Figure 8 shows the NH 3 -TPD curve of the four catalysts.…”

Section: Resultsmentioning

confidence: 99%

Modification of V2O5-WO3/TiO2 Catalyst by Loading of MnOx for Enhanced Low-Temperature NH3-SCR Performance

Zhang

Diao

et al. 2020

Nanomaterials

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V2O5-WO3/TiO2 as a commercial selective catalytic reduction (SCR) catalyst usually used at middle-high temperatures was modified by loading of MnOx for the purpose of enhancing its performance at lower temperatures. Manganese oxides were loaded onto V-W/Ti monolith by the methods of impregnation (I), precipitation (P), and in-situ growth (S), respectively. SCR activity of each modified catalyst was investigated at temperatures in the range of 100–340 °C. Catalysts were characterized by specific surface area and pore size determination (BET), X-ray diffraction (XRD), temperature programmed reduction (TPR), etc. Results show that the loading of MnOx remarkably enhanced the SCR activity at a temperature lower than 280 °C. The catalyst prepared by the in-situ growth method was found to be most active for SCR.

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“…Zn also affected the reducibility, surface acidity and NO adsorption ability of the catalyst. 38,39 In addition, a certain amount of V was found in FA, which indicated an outow of some active components during the operational process. Fig.…”

Section: Xrfmentioning

confidence: 98%

Research on the deactivation mechanism of a denitration catalyst WO₃–V₂O₅/TiO₂ at a coal-fired power plant

Liu

Yang

2020

RSC Adv.

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The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Cited by 70 publications

References 38 publications

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

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

Modification of V2O5-WO3/TiO2 Catalyst by Loading of MnOx for Enhanced Low-Temperature NH3-SCR Performance

Research on the deactivation mechanism of a denitration catalyst WO₃–V₂O₅/TiO₂ at a coal-fired power plant

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The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Cited by 70 publications

References 38 publications

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

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

Modification of V2O5-WO3/TiO2 Catalyst by Loading of MnOx for Enhanced Low-Temperature NH3-SCR Performance

Research on the deactivation mechanism of a denitration catalyst WO3–V2O5/TiO2 at a coal-fired power plant

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Research on the deactivation mechanism of a denitration catalyst WO₃–V₂O₅/TiO₂ at a coal-fired power plant