NO decomposition in non-reducing atmospheres. Technical progress report, December 1995--February 1996
The preparation of Co(II) ion exchanged zeolites was described in the previous quarterly progress report, and NO adsorption/desorption studies with these zeolites have now been carried out, especially with ZSM-5 and erionite zeolites. Diffuse reflectance spectroscopy was utilized to monitor the spectral changes that occurred during adsorption of NO on the Co(II) cations, which was observed to occur after dehydration treatments at 350{degrees}C and 525{degrees}C. Absorption bands in the charge transfer spectral region of NO-Co intrazeolitic complexes depended mainly on Co siting in the zeolites. Catalytic testing of NO decomposition and NO reduction by methane was carried out. It was observed that Co-mordenite and Co-A zeolite exhibited low, but stable, activity in NO decomposition. For NO reduction by methane in the presence of excess oxygen, Co-mordenite and Co-ferrierite exhibited the highest %NO converted to products and selectivity toward N{sub 2} formation, but Co-A zeolite and Co-erionite yielded the highest selectivities to NO{sub 2} formation. Co-ZSM-5 zeolite exhibited an intermediate behavior.
- Research Organization:
- Lehigh Univ., Bethlehem, PA (United States). Dept. of Chemistry
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-93PC93222
- OSTI ID:
- 249268
- Report Number(s):
- DOE/PC/93222--10; ON: DE96012091
- Country of Publication:
- United States
- Language:
- English
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