CATALYST FOR CLEANING EXHAUST GAS

PURPOSE:To obtain a catalyst having excellent cleaning ability of hydrocarbon (HC), CO and NOx even in an excess oxygen atmosphere by using a solid super strong acid with a transition metal or a transition metal oxide. CONSTITUTION:The solid super strong acid such as SO4/TiO2 or WO3/ZrO2 is used joi...

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Bibliographische Detailangaben
Hauptverfasser:	SAIKI MOTOHISA, YAMASHITA KOICHI, YOKOTA KOJI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a catalyst having excellent cleaning ability of hydrocarbon (HC), CO and NOx even in an excess oxygen atmosphere by using a solid super strong acid with a transition metal or a transition metal oxide. CONSTITUTION:The solid super strong acid such as SO4/TiO2 or WO3/ZrO2 is used jointly with the transition metal or the transition metal oxide of Mn, Fe, Co or the like. The catalyst obtained in such a way has excellent cleaning ability of HC, CO and NOx in the exhaust gas of the diesel engine or even in the case of lean burn under a dilute condition of gasoline conc. in an excess oxygen atmosphere. Of course, it has excellent cleaning ability of the exhaust gas in the case of not containing excessive oxygen.