NO decomposition in non-reducing atmospheres. Technical progress report, September 1995--November 1995
New samples of Co(II)-ZSM-5 zeolites were prepared, and Co-containing ZSM-5 and erionite were studied via diffuse reflectant spectroscopy after being dehydrated at 350 and 500{degrees}C and after adsorption of carbon monoxide, water, and ethylene. In general, Co-ZSM-5 contains three different Co sites. However, Co-ZSM-5 prepared at acidic conditions contained only two different sites. One of these sites is probably identical with the Co site in Co-erionite. After dehydration at 500{degrees}C, Co siting in these zeolites was changed. In erionite at this same condition, Co ions were located in the plane of the single regular six-ring. Only strong ligands such as water could be adsorbed on Co ions in ZSM-5 zeolite dehydrated at 350{degrees}C, but Co ions in zeolites dehydrated at 500{degrees}C were also affected by weak ligands. Adsorption studies with NO are underway, and catalytic testing for NO decomposition and reduction over Co-containing zeolites will be carried out during the next quarter.
- 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:
- 245661
- Report Number(s):
- DOE/PC/93222--9; ON: DE96011568
- Country of Publication:
- United States
- Language:
- English
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