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Reduction of coking on Ag / Al2O3HC-SCR catalyst
Reduction of coking on Ag / Al2O3HC-SCR catalyst
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机译:减少Ag / Al2O3HC-SCR催化剂上的焦化
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摘要
The present invention relates to a method of reducing coking over a Ag/Al2O3 hydrocarbon selective catalytic reduction catalyst in an exhaust stream of a lean burn internal combustion engine, the exhaust stream including hydrocarbon and NOx. The method includes controlling the hydrocarbon to molar NOx ratio of the exhaust stream so as to be within certain limits at certain temperatures. An exhaust system for a lean burn engine suited to the above method, and a lean burn internal combustion engine, or a vehicle or stationary power source including such an exhaust system are also included.
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机译:本发明涉及一种在稀燃内燃机的排气流中减少Ag / Al 2 O 3烃选择性催化还原催化剂上的焦化的方法,该排气流包括烃和NO x。该方法包括控制排气流的碳氢化合物与NOx摩尔比,以使其在特定温度下处于特定极限内。还包括适用于上述方法的稀燃发动机的排气系统和稀燃内燃机,或包括这种排气系统的车辆或固定动力源。
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