论文信息 - NOx reduction in the exhaust of mobile heavy-duty diesel engines by urea-SCR

NOx reduction in the exhaust of mobile heavy-duty diesel engines by urea-SCR

A DeNOx demonstration system for a diesel engine used in construction machineries and mobile cranes was setup. In preliminary experiments various extruded and coated SCR catalysts were evaluated with and without oxidizing pre-catalyst. The data from stationary tests with two selected catalysts were used to establish various model-based control algorithms for the optimum dosage of urea in the ESC and ETC. A NOx conversion of >93% at <10 ppm average ammonia slip could be achieved at a converter-to-swept volume ratio of <2.0.

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