Selective catalytic reduction of NO and NH{sub 3} over a bulk sulfated CuO/{gamma}-Al{sub 2}O{sub 3} catalyst
- Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of)
Sulfur dioxide (SO{sub 2}) and nitrogen oxides (NO{sub x}) are the major air pollutants, which have to be removed before emitting flue gas into the atmosphere. Various processes are under operation to remove SO{sub x} and NO{sub x} from flue gas. Selective reduction of nitric oxide by ammonia over sulfated CuO/{gamma}-Al{sub 2}O{sub 3} was carried out in a fixed-bed reactor. The optimum temperatures of the fresh and sulfated CuO/{gamma}-Al{sub 2}O{sub 3} in the selective catalytic reduction of NO are found to be 350 and 450 C, respectively. NO reduction with the sulfated catalyst is somewhat higher than that of the fresh catalyst. The amount of N{sub 2}O formation over the fresh and bulk sulfated catalysts is below 10% of NO in the feed stream. The intermediate in NO reduction by NH{sub 3} over the bulk sulfated catalyst is found to be ammonium sulfate from IR study. The activation energies of the fresh, surface, and bulk sulfated catalysts are found to be 29.4, 76.6, and 76.3 kJ/mol, respectively.
- OSTI ID:
- 682037
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 6 Vol. 38; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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