Startseite Performance and characterisation of CeO2–TiO2–WO3 catalysts for selective catalytic reduction of NO with NH3
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Performance and characterisation of CeO2–TiO2–WO3 catalysts for selective catalytic reduction of NO with NH3

  • Hao Li , Guang-Fei Qu , Yan-Kang Duan , Ping Ning , Qiu-Lin Zhang EMAIL logo , Xin Liu und Zhong-Xian Song
Veröffentlicht/Copyright: 19. März 2015
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Chemical Papers
Aus der Zeitschrift Chemical Papers Band 69 Heft 6

Abstract

Ce-Ti-W-Ox catalysts were prepared and applied to the NH3-selective catalytic reduction (SCR) reaction. The experimental results showed that the Ce-Ti-W-Ox catalyst prepared by the hydrothermal method exhibited higher NO conversion than those synthesised via the sol-gel and impregnating methods, while the optimal content of WO3 and molar ratio of Ce/Ti were 20 mass % and 4 : 6, respectively. Under these conditions, the catalyst exhibited the highest level of catalytic activity (the NO conversion reached values higher than 90 %) across a wide temperature range of 225-450◦C, with a range of gas hourly space velocity (GHSV) of 40000-140000 h−1. The catalyst also exhibited good resistance to H2O and SO2. The influences of morphology, phase structure, and surface properties on the catalytic performance were investigated by N2 adsorption-desorption measurement, XRD, XPS, H2-TPR, and SEM. It was found that the high efficiency of NO removal was due to the large BET surface area, the amorphous surface species, the change to element valence states, and the strong interaction between Ce, Ti, and W.

Keywords: selective catalytic reduction; Ce-Ti-W-Ox; hydrothermal method; strong interaction

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Received: 2014-6-19
Revised: 2014-9-17
Accepted: 2014-11-3
Published Online: 2015-3-19
Published in Print: 2015-6-1

© 2015 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.1515/chempap-2015-0082
Schlagwörter für diesen Artikel
selective catalytic reduction; Ce-Ti-W-Ox; hydrothermal method; strong interaction

Artikel in diesem Heft

  1. Laser microsampling and multivariate methods in provenance studies of obsidian artefacts
  2. Ultra-trace arsenic and mercury speciation and determination in blood samples by ionic liquid-based dispersive liquid–liquid microextraction combined with flow injection-hydride generation/cold vapor atomic absorption spectroscopy
  3. Determination of formaldehyde by flow injection analysis with spectrophotometric detection exploiting brilliant green–sulphite reaction
  4. Passive sampling application to control air quality in interior of new vehicles
  5. Low-temperature enzymatic hydrolysis resolution in mini-emulsion media
  6. Performance and characterisation of CeO2–TiO2–WO3 catalysts for selective catalytic reduction of NO with NH3
  7. Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3
  8. Morphology, structure, and photoactivity of two types of graphene oxide–TiO2 composites
  9. A novel efficient magnetic core–zeolitic shell nanocatalyst system: preparation, characterization and activity
  10. Characterisation and coagulation performance of polysilicate–ferric–zinc
  11. Antioxidant activity of rosemary extracts in solution and embedded in polymeric systems
  12. Comparison of selected aroma compounds in cultivars of sea buckthorn (Hippophae rhamnoides L.)
  13. Thio-click approach to the synthesis of stable glycomimetics
  14. Synthesis of ether-linked [60]fullerene glycoconjugates by nucleophilic cyclopropanation
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