NO decomposition in non-reducing atmospheres. Final report, September 1993--February 1997
Co(II)NH{sub 4}-erionite zeolites with cobalt contents varying from 0.002 to 8.2 wt% of Co(II) were prepared, and the samples were studied via diffuse reflectance spectroscopy in the UV-VIS-NIR region and measurement of magnetic moments of the Co ions. Samples of Co(II)-ZSM-5 zeolites were also prepared and studied via diffuse reflectance spectroscopy after being dehydrated at 350 and 525 C and after adsorption of carbon monoxide, water, and ethylene. NO adsorption/desorption studies were carried out, and 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 C and 525 C. In selective catalytic reduction of NO by methane, it was observed that 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)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- FG22-93PC93222
- OSTI ID:
- 629355
- Report Number(s):
- DOE/PC/93222--99; ON: DE98054196
- Country of Publication:
- United States
- Language:
- English
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