A Perspective on the Selective Catalytic Reduction (SCR) of NO with NH3 by Supported V2O5 –WO3/TiO2 Catalysts

Lai, Jun-Kun; Wachs, Israel E.

doi:10.1021/acscatal.8b01357

A Perspective on the Selective Catalytic Reduction (SCR) of NO with NH₃ by Supported V₂O₅ –WO₃/TiO₂ Catalysts

Journal Article · Mon Jun 04 00:00:00 EDT 2018 · ACS Catalysis

DOI:https://doi.org/10.1021/acscatal.8b01357· OSTI ID:1454677

Lai, Jun-Kun ^[1]; ^[2]

Lehigh Univ., Bethlehem, PA (United States). Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical and Biomolecular Engineering; Lehigh University
Lehigh Univ., Bethlehem, PA (United States). Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical and Biomolecular Engineering

We report the selective catalytic reduction (SCR) of NO_x with NH₃ to harmless N₂ and H₂O plays a crucial role in reducing highly undesirable NO_x acid gas emissions from large utility boilers, industrial boilers, municipal waste plants, and incinerators. The supported V₂O₅ –WO₃/TiO₂ catalysts have become the most widely used industrial catalysts for these SCR applications since introduction of this technology in the early 1970s. Lastly, this Perspective examines the current fundamental understanding and recent advances of the supported V₂O₅ –WO₃/TiO₂ catalyst system: (i) catalyst synthesis, (ii) molecular structures of titaniasupported vanadium and tungsten oxide species, (iii) surface acidity, (iv) catalytic active sites, (v) surface reaction intermediates, (vi) reaction mechanism, (vii) ratedetermining- step, and (viii) reaction kinetics.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME); Lehigh Univ., Bethlehem, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012577

OSTI ID:: 1454677

Journal Information:: ACS Catalysis, Journal Name: ACS Catalysis Vol. 8; ISSN 2155-5435

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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NOx and N2O emissions over a Urea-SCR system containing both V2O5-WO3/TiO2 and Cu-zeolite catalysts in a diesel engine Jung, Yongjin; Shin, Young Jin; Pyo, Young Dug Chemical Engineering Journal, Vol. 326 https://doi.org/10.1016/j.cej.2017.06.020	journal	October 2017
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Nature of Active Sites and Surface Intermediates during SCR of NO with NH ₃ by Supported V ₂ O ₅ –WO ₃ /TiO ₂ Catalysts Zhu, Minghui; Lai, Jun-Kun; Tumuluri, Uma Journal of the American Chemical Society, Vol. 139, Issue 44 https://doi.org/10.1021/jacs.7b09646	journal	October 2017
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Quantitative Determination of the Speciation of Surface Vanadium Oxides and Their Catalytic Activity Tian, Hanjing; Ross, Elizabeth I.; Wachs, Israel E. The Journal of Physical Chemistry B, Vol. 110, Issue 19 https://doi.org/10.1021/jp055767y	journal	May 2006
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Structural Determination of Bulk and Surface Tungsten Oxides with UV−vis Diffuse Reflectance Spectroscopy and Raman Spectroscopy Ross-Medgaarden, Elizabeth I.; Wachs, Israel E. The Journal of Physical Chemistry C, Vol. 111, Issue 41 https://doi.org/10.1021/jp074219c	journal	September 2007
Dynamics of Hydration in Vanadia–Titania Catalysts at Low Loading: A Theoretical and Experimental Study Lewandowska, Anna E.; Calatayud, Mònica; Tielens, Frederik The Journal of Physical Chemistry C, Vol. 115, Issue 49 https://doi.org/10.1021/jp204726b	journal	November 2011
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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
NH3
NO
SCR
TiO2
V2O5
WO3
catalyst