发明授权
US08173074B2 Apparatus for reducing dibenzodioxin emissions and dibenzofuran emissions from transition metal-containing catalyzers
有权
用于从含过渡金属的催化剂中还原二苯并二恶英排放和二苯并呋喃排放的装置
- 专利标题： Apparatus for reducing dibenzodioxin emissions and dibenzofuran emissions from transition metal-containing catalyzers
- 专利标题（中）： 用于从含过渡金属的催化剂中还原二苯并二恶英排放和二苯并呋喃排放的装置
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申请号： US12355930申请日： 2009-01-19
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公开(公告)号： US08173074B2公开(公告)日： 2012-05-08
- 发明人: Andreas Döring
- 申请人： Andreas Döring
- 申请人地址： DE München
- 专利权人： MAN Truck & Bus AG
- 当前专利权人： MAN Truck & Bus AG
- 当前专利权人地址： DE München
- 代理机构： Cozen O'Connor
- 优先权： DE102008008748 20080212
- 主分类号： B01D53/34
- IPC分类号： B01D53/34 ; F01N3/10
摘要：
A device for reducing the emission of polychlorinated dibenzodioxins (PCDD) and polychlorinated dibenzofurans (PCDF) from transition metal-containing catalyzers for selective catalytic reduction of nitric oxides in the exhaust gas of an internal combustion engine by means of ammonia and/or reducing agents which split off ammonia. At least one catalyzer for oxidizing hydrocarbon-containing PCDD precursor substances and PCDF is arranged upstream of the at least one transition metal-containing SCR catalyzer and/or at least one catalyzer for degrading precursor substances for degrading the polychlorinated dibenzodioxins and/or polychlorinated dibenzofurans is arranged downstream of the at least one transition metal-containing catalyzer. The at least one catalyzer for degrading PCDD and PCDF and/or the at least one catalyzer for oxidizing hydrocarbon-containing precursor substances thereof are/is additionally active for the reduction of nitric oxides by means of ammonia.