Method for removal of nitrogen oxides from exhaust gas of diesel engine
First Claim
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1. A method for the removal of nitrogen oxides from the exhaust gas of a diesel engine through catalytic reduction by the use of a honeycomb catalyst in the presence of ammonia, which method comprises feeding ammonia into said exhaust gas proportionately to the product of the revolution speed of said diesel engine multiplied by the transmitted torque of said diesel engine.
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Abstract
A method for the removal of nitrogen oxides from the exhaust gas of a diesel engine through catalytic reduction by the use of honeycomb catalyst in the presence of ammonia, which method comprises feeding ammonia into said exhaust gas proportionately to the product of the revolution number of said diesel engine multiplied by the torque of said diesel engine.
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8 Claims
- 1. A method for the removal of nitrogen oxides from the exhaust gas of a diesel engine through catalytic reduction by the use of a honeycomb catalyst in the presence of ammonia, which method comprises feeding ammonia into said exhaust gas proportionately to the product of the revolution speed of said diesel engine multiplied by the transmitted torque of said diesel engine.
- 7. A system for the removal of nitrogen oxides from the exhaust gas of diesel engine, formed by providing a diesel engine with an arithmetic unit, an engine revolution speed sensor adapted to detect the revolution speed of said diesel engine and interconnected to said arithmetic unit, a torque meter adapted to detect the transmitted torque generated by said diesel engine and interconnected to said arithmetic unit, an ammonia flow volume controlling valve interconnected to an ammonia source adapted to effect control of the flow volume of ammonia by the signal received from said arithmetic unit, and an ammonia feed pipe connected to said ammonia flow volume controlling valve and to a converter packed with a honeycomb catalyst and fitted with a nozzle opening into the exhaust tube.
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