Effect of V2O5 loading of V2O5/TiO2 catalysts prepared via CVC and impregnation methods on NOx removal

Woojoon Cha; Sungmin Chin; Eunseuk Park; Seong Taek Yun; Jongsoo Jurng

doi:10.1016/j.apcatb.2013.05.002

Effect of V₂O₅ loading of V₂O₅/TiO₂ catalysts prepared via CVC and impregnation methods on NO_x removal

Woojoon Cha, Sungmin Chin, Eunseuk Park, Seong Taek Yun, Jongsoo Jurng

Department of Earth and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

In this study, V₂O₅/CVC-TiO₂ materials with different concentrations of V₂O₅ were prepared via chemical vapor condensation (CVC) and impregnation. The catalytic activities of these materials were tested and the physicochemical characteristics were analyzed using XRD, BET, FT-IR spectroscopy, XPS, HR-TEM, EDX mapping, H₂-TPR, and NH₃-TPD. The NO_x removal efficiency of the V₂O₅/CVC-TiO₂ catalysts was higher than that of the V₂O₅/P25-TiO₂ catalysts and increased with increasing V₂O₅ concentration. At 200°C, the highest NO_x conversion was observed using 7 and 10wt% V₂O₅/CVC-TiO₂ catalysts. The NO_x conversion curve reached a plateau corresponding to the maximum conversion when the V₂O₅ content was greater than 7wt%. The V₂O₅/CVC-TiO₂ catalyst comprised mainly anatase-phase TiO₂ and well-dispersed V₂O₅. A greater concentration of V (well-balanced V⁴⁺/V⁵⁺) species existed on the V₂O₅/CVC-TiO₂ catalyst surface. H₂-TPR and NH₃-TPD testing confirmed that the V₂O₅/CVC-TiO₂ catalyst is highly reducible and has many acidic sites.

Original language	English
Pages (from-to)	708-715
Number of pages	8
Journal	Applied Catalysis B: Environmental
Volume	140-141
DOIs	https://doi.org/10.1016/j.apcatb.2013.05.002
Publication status	Published - 2013 Aug

Keywords

Chemical vapor condensation (CVC)
NO
SCR
VO/TiO

ASJC Scopus subject areas

Catalysis
Environmental Science(all)
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2013.05.002

Cite this

@article{a7d3443282a84b3688d6c4c06fc05a99,

title = "Effect of V2O5 loading of V2O5/TiO2 catalysts prepared via CVC and impregnation methods on NOx removal",

abstract = "In this study, V2O5/CVC-TiO2 materials with different concentrations of V2O5 were prepared via chemical vapor condensation (CVC) and impregnation. The catalytic activities of these materials were tested and the physicochemical characteristics were analyzed using XRD, BET, FT-IR spectroscopy, XPS, HR-TEM, EDX mapping, H2-TPR, and NH3-TPD. The NOx removal efficiency of the V2O5/CVC-TiO2 catalysts was higher than that of the V2O5/P25-TiO2 catalysts and increased with increasing V2O5 concentration. At 200°C, the highest NOx conversion was observed using 7 and 10wt% V2O5/CVC-TiO2 catalysts. The NOx conversion curve reached a plateau corresponding to the maximum conversion when the V2O5 content was greater than 7wt%. The V2O5/CVC-TiO2 catalyst comprised mainly anatase-phase TiO2 and well-dispersed V2O5. A greater concentration of V (well-balanced V4+/V5+) species existed on the V2O5/CVC-TiO2 catalyst surface. H2-TPR and NH3-TPD testing confirmed that the V2O5/CVC-TiO2 catalyst is highly reducible and has many acidic sites.",

keywords = "Chemical vapor condensation (CVC), NO, SCR, VO/TiO",

author = "Woojoon Cha and Sungmin Chin and Eunseuk Park and Yun, {Seong Taek} and Jongsoo Jurng",

note = "Funding Information: This work was supported by the Ministry of Environment ( 192-091-001 ) and the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (2013, University-Institute cooperation program).",

year = "2013",

month = aug,

doi = "10.1016/j.apcatb.2013.05.002",

language = "English",

volume = "140-141",

pages = "708--715",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

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T1 - Effect of V2O5 loading of V2O5/TiO2 catalysts prepared via CVC and impregnation methods on NOx removal

AU - Cha, Woojoon

AU - Chin, Sungmin

AU - Park, Eunseuk

AU - Yun, Seong Taek

AU - Jurng, Jongsoo

N1 - Funding Information: This work was supported by the Ministry of Environment ( 192-091-001 ) and the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (2013, University-Institute cooperation program).

PY - 2013/8

Y1 - 2013/8

N2 - In this study, V2O5/CVC-TiO2 materials with different concentrations of V2O5 were prepared via chemical vapor condensation (CVC) and impregnation. The catalytic activities of these materials were tested and the physicochemical characteristics were analyzed using XRD, BET, FT-IR spectroscopy, XPS, HR-TEM, EDX mapping, H2-TPR, and NH3-TPD. The NOx removal efficiency of the V2O5/CVC-TiO2 catalysts was higher than that of the V2O5/P25-TiO2 catalysts and increased with increasing V2O5 concentration. At 200°C, the highest NOx conversion was observed using 7 and 10wt% V2O5/CVC-TiO2 catalysts. The NOx conversion curve reached a plateau corresponding to the maximum conversion when the V2O5 content was greater than 7wt%. The V2O5/CVC-TiO2 catalyst comprised mainly anatase-phase TiO2 and well-dispersed V2O5. A greater concentration of V (well-balanced V4+/V5+) species existed on the V2O5/CVC-TiO2 catalyst surface. H2-TPR and NH3-TPD testing confirmed that the V2O5/CVC-TiO2 catalyst is highly reducible and has many acidic sites.

AB - In this study, V2O5/CVC-TiO2 materials with different concentrations of V2O5 were prepared via chemical vapor condensation (CVC) and impregnation. The catalytic activities of these materials were tested and the physicochemical characteristics were analyzed using XRD, BET, FT-IR spectroscopy, XPS, HR-TEM, EDX mapping, H2-TPR, and NH3-TPD. The NOx removal efficiency of the V2O5/CVC-TiO2 catalysts was higher than that of the V2O5/P25-TiO2 catalysts and increased with increasing V2O5 concentration. At 200°C, the highest NOx conversion was observed using 7 and 10wt% V2O5/CVC-TiO2 catalysts. The NOx conversion curve reached a plateau corresponding to the maximum conversion when the V2O5 content was greater than 7wt%. The V2O5/CVC-TiO2 catalyst comprised mainly anatase-phase TiO2 and well-dispersed V2O5. A greater concentration of V (well-balanced V4+/V5+) species existed on the V2O5/CVC-TiO2 catalyst surface. H2-TPR and NH3-TPD testing confirmed that the V2O5/CVC-TiO2 catalyst is highly reducible and has many acidic sites.

KW - Chemical vapor condensation (CVC)

KW - NO

KW - SCR

KW - VO/TiO

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