发明名称 |
Catalyst for the reduction of NO to N2 with ethanol or ethanol and hydrogen under lean DENOx conditions |
摘要 |
<p>The invention relates to a novel catalyst having excellent activity, selectivity and stability for reducing nitric oxide to gas nitrogen, with ethanol or an ethanol-hydrogen mixture being used as a reducing agent, in the low temperature range of 150-300 °C and in the presence of an excess of oxygen (e.g., 5 % vol), H 2 O (5 % vol) and SO 2 (50 ppm) in the supply. The inventive catalyst consists of silver crystals which are in contact with the phases of a mixed MgO, CeO 2 and Al 2 O 3 medium. The Ag/MgO-CeO 2 -Al 2 O 3 catalyst can be used to obtain NO conversion levels which are greater than 40 %, nitrogen selectivity values of greater than 95 % and CO 2 selectivity values greater than 97% under NO x oxidation conditions in the 150-400 °C temperature range and for a surface contact time of 0.09 s. In particular, 90% NO conversion is obtained as well as N 2 and CO 2 selectivity levels of 99 % at 250 °C with a reaction mixture of 500 ppm NO/1000 ppm C 2 H 5 OH /5% O 2 /5% H 2 O / 50ppm SO 2 /He:</p> |
申请公布号 |
EP2468399(A1) |
申请公布日期 |
2012.06.27 |
申请号 |
EP20100390001 |
申请日期 |
2010.12.23 |
申请人 |
CYPRUS UNIVERSITY OF TECHNOLOGY |
发明人 |
COSTA, N. COSTAS;VALANIDOU, LILIAN;SAVVA, PETROS G.;THEOLOGIDES, CHRISTODOULOS |
分类号 |
B01J23/50;B01D53/86;B01D53/94 |
主分类号 |
B01J23/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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