NDLI: United States Patent 19 Murachi et al . 54 METHOD FOR PURIFYING

Content Provider	Semantic Scholar
Author	Murachi, Mikio Kojima, Koichi
Copyright Year	2017
Abstract	According to the method of the present invention, NO (nitrogen monoxide) in the exhaust gas of a diesel engine is first oxidized to NO, (nitrogen dioxide) by an oxidizing catalyst. Further, carbon particles in the exhaust gas are trapped by a DPF (diesel particulate filter). The exhaust gas containing NO, formed by oxidation of nitrogen monoxide is, then, fed to the DPF, and NO in the exhaust gas reacts with the carbon particles trapped in the DPF. When the NO reacts with carbon particles, carbon particles are oxidized (burned) by NO, and removed from DPF, and, at the same time, NO, is reduced to NO by the carbon particles. The exhaust gas containing NO formed by the reaction between the carbon particles and NO is fed to an NO absorbent. In the NO absorbent, NO is absorbed by the NO absorbent and, thereby, removed from the exhaust gas. Therefore, according this method, the carbon particles collected by the DPF can be easily burned by NO, thereby being removed from the DPF without increasing the amount of NO released to the atmosphere.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://patentimages.storage.googleapis.com/b6/72/18/94f62b686c0241/US5746989.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Patent

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