Sequentially prepared Mo-V-Based SCR catalyst for simultaneous Hg0 oxidation and NO reduction

Li, Can; Sriram, Vishnu; Liu, Zhouyang; Brewe, Dale; Lee, Joo-Youp

doi:10.1016/j.apcata.2021.118032

Sequentially prepared Mo-V-Based SCR catalyst for simultaneous Hg⁰ oxidation and NO reduction

Journal Article · Fri Feb 05 00:00:00 EST 2021 · Applied Catalysis. A, General

DOI:https://doi.org/10.1016/j.apcata.2021.118032· OSTI ID:1846426

Li, Can ^[1]; ^[1]; Liu, Zhouyang ^[1]; Brewe, Dale ^[2]; Lee, Joo-Youp ^[1]

Univ. of Cincinnati, OH (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

Molybdenum (Mo)-vanadium (V)-based selective catalytic reduction (SCR) catalyst synthesized by the sequential impregnation of Mo and W followed by V was investigated for simultaneous elemental mercury (Hg⁰) oxidation and nitrogen oxide (NO) reduction in an existing SCR unit with respect to different TiO₂ phases, calcination temperatures, flue gas constituents, gas velocities, and reaction temperatures. Anatase phase TiO₂ and the calcination temperatures of 400 and 500 degrees C resulted in similar to 69% Hg⁰ oxidation at 10 ppmv HCl and 350 degrees C. The high calcination temperature of 700 degrees C resulted in TiO₂ phase transformation from anatase to rutile and agglomeration. The modified SCR catalyst prepared with the impregnation sequence of Mo and W followed by V using anatase TiO₂ and calcination temperature 500 degrees C showed similar to 99% Hg⁰ oxidation and 87% NO reduction conversions at an NH₃/NO molar ratio of 0.9 under 350 degrees C and 5,000 hr^-1 space velocity in typical sub-bituminous and lignite coal simulated flue gases. Finally, the effects of these parameters and conditions were further investigated using various characterization techniques including BET, TEM, XRD, NH₃ TPD and XAFS.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: Canadian Light Source, Inc.; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1846426

Journal Information:: Applied Catalysis. A, General, Journal Name: Applied Catalysis. A, General Vol. 614; ISSN 0926-860X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Sequentially prepared Mo-V-Based SCR catalyst for simultaneous Hg0 oxidation and NO reduction

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References (44)

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Sequentially prepared Mo-V-Based SCR catalyst for simultaneous Hg⁰ oxidation and NO reduction