Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Supported CeO2 catalysts in technical form for sustainable chlorine production

Moser, M., Mondelli, C., Schmidt, T., Girgsdies, F., Schuster, M. E., Farra, R., et al. (2013). Supported CeO2 catalysts in technical form for sustainable chlorine production. Applied Catalysis B: Environmental, 132–133, 123-131. doi:10.1016/j.apcatb.2012.11.024.

Item is

Dateien

einblenden: Dateien
ausblenden: Dateien
:
APCATB-D-12-01089_final_manuscript.doc.pdf (beliebiger Volltext), 3MB
Name:
APCATB-D-12-01089_final_manuscript.doc.pdf
Beschreibung:
-
OA-Status:
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
2013
Copyright Info:
Elsevier
Lizenz:
-

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Moser, M.1, Autor
Mondelli, C.1, Autor
Schmidt, T.2, Autor
Girgsdies, Frank3, Autor           
Schuster, Manfred Erwin3, Autor           
Farra, Ramzi3, Autor           
Szentmiklósi, L.4, Autor
Teschner, Detre3, 4, Autor           
Pérez-Ramírez, J.1, Autor
Affiliations:
1Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland, ou_persistent22              
2Bayer MaterialScience AG, IO-BC-PI, Chempark B537, D-41538 Dormagen, Germany, ou_persistent22              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
4Centre for Energy Research, Hungarian Academy of Sciences, Budapest H-1525, Hungary, ou_persistent22              

Inhalt

einblenden:
ausblenden:
Schlagwörter: Chlorine production; HCl oxidation; Ceria; Support; CeO2/ZrO2; Technical catalyst; Pilot test
 Zusammenfassung: Bulk CeO2 has been recently reported as a promising catalyst for the oxidation of HCl to Cl2. In order to undertake the scale up of this system, various oxides (TiO2, Al2O3 , and low- and high-surface area ZrO2) have been evaluated as carriers. Supported CeO2 catalysts (3–20 wt.% Ce) prepared by dry impregnation were isothermally tested at the lab scale. Their performance was ranked as: CeO2/ZrO2 ≫ CeO2/Al2O3 ≥ CeO2/TiO2. Kinetic data revealed a lower activation energy and a similar activity dependence on the partial pressure of O2 for CeO2/ZrO2 compared to bulk CeO2. Pilot-scale testing over 3-mm pellets of this catalyst evidenced outstanding stability for 700 h on stream. In-depth characterization of the carriers and fresh catalysts by N2 sorption, Hg porosimetry, X-ray diffraction, temperature-programmed reduction with H2, Raman spectroscopy, electron microscopy, and in situ prompt gamma activation analysis, enabled to rationalize the different catalytic behavior of the materials. ZrO2 stabilizes nanostructures of CeO2 and a Ce–Zr mixed oxide phase, which offer high dispersion and improved oxidation properties. The catalyst also shows reduced chlorine uptake, and overall stands as a better Deacon material compared to bulk CeO2 and other supported systems. CeO2 is present on Al2O3 predominantly as well-distributed nanoparticles. Still, alumina does not induce any electronic effect, thus the supported phase behaves similarly to bulk ceria. TiO2, likely due to the structural collapse and dramatic sintering suffered during calcination, leads to the formation of very large ceria particles. Based on our results, CeO2/ZrO2 appears as a robust and cost-effective alternative to the current RuO2-based catalysts for large-scale chlorine recovery.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2012-11-072012-09-082012-11-192012-11-282013-03-27
 Publikationsstatus: Erschienen
 Seiten: 9
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.apcatb.2012.11.024
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Applied Catalysis B: Environmental
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Amsterdam : Elsevier
Seiten: - Band / Heft: 132–133 Artikelnummer: - Start- / Endseite: 123 - 131 Identifikator: ISSN: 0926-3373
CoNE: https://pure.mpg.de/cone/journals/resource/954928540173