• ambient temperature nox emission control for lean-burn engines by electro-catalytic tubes

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     lean-burn gasoline and diesel automobiles can have superior fuel efficiency but require advanced denoxtechnology. for a catalytic converter to be put underneath the passenger cars, it must be compact enough. effective automotive denox treatment should start at ambient temperature to avoid a heating period when the pollutant cannot be effectively treated. an electro-catalytic honeycomb, composed of electro-catalytic tubes, would fulfill this size requirement. this work demonstrates that effective lean denox can be performed at ambient temperature by an electro-catalytic tube. the denox activity is relatively insensitive to the variation of temperature from 200 to 600 °c and increases slightly when temperature decreases from 200 °c to ambient, but is quite sensitive to that of either the oxygen concentration or the nox concentration. when the oxygen concentration and the nox concentration increase from 0.5 to 14% and from 250 to 3800 ppm, respectively, the denox activities increase considerably. the no conversion also increases with decreasing nox concentration below 250 ppm, when there is zero no2 yield; these can result in zero noxemission.

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