Regenerable cerium oxide based odor adsorber for indoor air purification from acidic volatile organic compounds
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Autor:in (Körperschaft)
Publikationsdatum
2014
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Applied Catalysis B: Environmental
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
147
Ausgabe / Nummer
Seiten / Dauer
965-972
Patentnummer
Verlag / Herausgebende Institution
Elsevier
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Indoor odor management currently relies on energy-intensive high air exchange rates, or, more sustainable, on single use volatile organic compounds (VOC) adsorbers or ozonisation. This study investigates a more sustainable, multi-cycle use of an odor adsorber system that combines concepts from catalytic oxidation and air cleaning. Both pure and sodium doped, nanostructured CeO2 were tested as adsorber material for high volume removal of odorous compounds from air. As a representative compound for unpleasant odors, hexanoic acid (HA) was used. After air cleaning on fixed beds of CeO2 or Na/CeO2, both hexanoic acid loaded adsorber materials were heated under air and displayed considerable oxidation activity at 191 °C and 263 °C, respectively. Mass spectroscopy was used to confirm that no hexanoic acid desorbed during combustion. Cerium oxide showed an adsorber efficiency of ≥96.5% over a period of 60 h (Cin = 0.044 mg/L, gas hourly space velocity, GHSV = 440 h−1) and sodium doped cerium oxide adsorbed ≥97% for over 90 h (Cin = 0.056 mg/L, GHSV = 1100 h−1). CeO2 was regenerated at 220 °C in air and could be successfully re-used as adsorber without noticeable loss in performance. The study demonstrates that CeO2 has most promising properties for application as re-usable air cleaner due to its very good ability for adsorption even at highly dilute conditions (ppm-level) using a representative acidic test compound with rancid and sweaty odor. Sodium as a basic dopant further improved the adsorption of hexanoic acid but requires a higher regeneration temperature.
Schlagwörter
Fachgebiet (DDC)
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
0926-3373
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Nein
Zukunftsfelder FHNW
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Closed
Lizenz
Zitation
Raso, R., Stepuk, A., Mohn, D., Paunescu, D., Koehler, F. M., & Stark, W. J. (2014). Regenerable cerium oxide based odor adsorber for indoor air purification from acidic volatile organic compounds. Applied Catalysis B: Environmental, 147, 965–972. https://doi.org/10.1016/j.apcatb.2013.10.030