Selective reduction of NO2 with acetaldehyde over Co/Al2O3 in lean conditions

Atsushi Takahashi, Masaaki Haneda, Tadahiro Fujitani, Hideaki Hamada

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Selective reduction of NO2 with acetaldehyde (CH3CHO) was investigated over alumina-supported catalysts. Among the catalysts tested, Co/Al2O3 showed the highest activity with a maximum performance at 2 wt.% Co loading. The comparison of the activity of Co/Al2O3 and Al2O3 for several unit reactions suggested that one of the roles of supported Co is to suppress the combustion of CH3CHO by O2, resulting in an enhancement of the selective reaction of CH3CHO with NO2. The observation of the adsorbed species by in situ FT-IR spectroscopy showed that enolate species acts as the intermediate for NO2 reduction by CH3CHO and that another role of Co is to promote the production of the enolate species.

Original languageEnglish
Pages (from-to)6-11
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Issue number1
Publication statusPublished - 2007 Jan 2


  • Acetaldehyde
  • Co/AlO
  • NO selective reduction


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