A 13C and 15N solid state NMR study of the reactions of acetone oxime adsorbed on FeZSM-5

• Published in: Catalysis letters Vol. 78; no. 1-4; pp. 243 - 249
• Main Authors: JONES, Conrad A, LARSEN, Sarah C
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01-03-2002; Springer Nature B.V
• Subjects: Acetic acid; Acetone; Catalysis; Catalytic reactions; Chemistry; Decomposition; Exact sciences and technology; Gas formation; General and physical chemistry; Iron; Nitrogen isotopes; NMR; NMR spectroscopy; Nuclear magnetic resonance; Selective catalytic reduction; Solid state; Sublimation; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Vapor phases; Reaction intermediate; Catalytic reaction; Hydrocarbon; Liquid solid adsorption; Catalyst selectivity; Cross polarization; Oxime; Modified catalyst; NMR spectrometry; Thermal reaction; Zeolite; Experimental study; Molecular sieve; Chemical reduction; Heterogeneous catalysis; Solid state; Iron ion; Nitric oxide; Alkane; Ion exchange; Propane; Acetone
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1023/A:1014928430606

The reactions of acetone oxime, a proposed reaction intermediate for the SCR (Selective Catalytic Reduction) of NO with propane on FeZSM-5, have been studied with 13C and 15N solid state MAS NMR (magic angle spinning nuclear magnetic resonance). FeZSM-5 with three different loading levels was prepared by the sublimation method. The thermal reactions of acetone [2-13C] oxime adsorbed on FeZSM-5 samples with different iron loadings were monitored by 13C MAS NMR by heating to the desired temperature and then cooling to room temperature for data acquisition. For the sample with the lowest iron loading (Fe/Al = 0.11), acetic acid and N-methyl-2-propanamine were formed by the decomposition of acetone oxime. For the samples with the higher iron loadings (Fe/Al = 0.69 and 0.91), acetone, N,N′-methyl-2,2-propanediamine, and N-methyl-2-propanimine were formed by the decomposition of acetone oxime. 15N MAS NMR was used to investigate reactions of 15NO and acetone oxime on the FeZSM-5 samples. The formation of gas phase N2 and N2O was observed.