Device and method for operating nitrogen oxide catalyst
The invention relates to a device (100) and a method (102) for operating a catalyst for the selective catalytic reduction of nitrogen oxides in an exhaust gas (102). The size of the urea aqueous solution film on at least a portion of an inner wall (114) of a line (116) through which exhaust gas and...
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Main Author | |
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Format | Patent |
Language | Chinese English |
Published |
07.07.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a device (100) and a method (102) for operating a catalyst for the selective catalytic reduction of nitrogen oxides in an exhaust gas (102). The size of the urea aqueous solution film on at least a portion of an inner wall (114) of a line (116) through which exhaust gas and urea aqueous solution can be fed to the catalyst (102) is determined by means of a model (110) for predicting the urea aqueous solution film on at least a portion of the inner wall (114), the size of the urea aqueous solution film on at least a portion of the inner wall (114) being determined when the size is below a threshold value. Wherein, when the size reaches or exceeds the threshold value, the mass flow of the aqueous urea solution introduced into the catalyst (102) is limited to a first value, and wherein, when the size reaches or exceeds the threshold value, the mass flow of the aqueous urea solution is limited to a second value, which is smaller than the first value.
用于运行用于选择性地催化还原在废气(102)中的氮氧化物的催化器的设备(100 |
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Bibliography: | Application Number: CN202310013441 |