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    • 3. 发明公开
    • 디젤엔진 배기가스내 NOx의 환원방법
    • 减少柴油发动机废气中的NOX的方法
    • KR1020060097053A
    • 2006-09-13
    • KR1020067012259
    • 2004-11-05
    • 모터즈 리퀴데이션 컴퍼니
    • 조병권이종환
    • F01N3/20F01N13/00B01D53/54
    • F01N3/2066F01N13/009F01N2240/28F01N2250/02F01N2610/03F01N2610/08F01N2610/10H05H1/2406H05H2001/245H05H2001/2468H05H2245/1215Y02T10/24
    • A method of reducing nitrogen oxides in an oxygen-containing exhaust stream (12) using ethanol (26) as a reductant for plasma-assisted selective catalytic reduction. The exhaust gas (12), generated from a diesel engine or other lean-burn power source (10), comprises nitrogen oxides, especially NO. Ozone generated from a plasma reactor (20) is injected into the exhaust stream (16) to convert NO to NO2 and the plasma injection is followed by the addition of ethanol (26). The NO2 is then reduced by contacting the exhaust stream (28) with a dual-bed catalytic reactor (24) comprising BaY (or NaY) and CuY zeolite catalysts in the presence of ethanol as the reductant. The plasma power density and the molar ratio of ethanol to NOx fed to the catalytic reactor (24) are controlled as a function of the catalyst temperature for the best performance of the plasma-catalyst system. An average conversion of NOx to N2 of at least 90 % is achieved over the temperature range of 200-400 °C.
    • 使用乙醇(26)作为用于等离子体辅助选择性催化还原的还原剂来还原含氧排气流(12)中的氮氧化物的方法。 从柴油发动机或其他稀燃燃烧电源(10)产生的废气(12)包括氮氧化物,特别是NO。 将从等离子体反应器(20)产生的臭氧注入排气流(16)中以将NO转化为NO2,然后加入等离子体注入乙醇(26)。 然后通过在乙醇作为还原剂的存在下使废气流(28)与包含BaY(或NaY)和CuY沸石催化剂的双床催化反应器(24)接触来还原NO 2。 作为催化剂温度的函数,等离子体功率密度和进料到催化反应器(24)的乙醇与NOx的摩尔​​比被控制以获得最佳性能的等离子体催化剂体系。 在200-400℃的温度范围内实现了NOx至N2的平均转化率至少为90%。