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发明公开
CN102600720A 涂覆的钙钛矿基催化剂、催化剂组合和处理气体物流的方法 失效 - 权利终止

涂覆的钙钛矿基催化剂、催化剂组合和处理气体物流的方法
摘要：
本发明涉及涂覆的钙钛矿基催化剂、催化剂组合和处理气体物流的方法。本发明的一种实施方案包括处理气体物流的方法，该方法包括将气体物流首先流过烃减少和NOx还原催化剂，随后将气体流过用于NOx氧化和贮存的钙钛矿和NOx捕集材料。在一种实施方案中，烃减少和NOx还原催化剂可以包括钯。在一种实施方案中，钙钛矿催化剂可以具有通式ABO3、AA′BO3、ABB′O3或AA′BB′O3。钙钛矿催化剂可以是唯一的催化剂，或第二非钙钛矿催化剂可以包括钯、铂、铑、钌或包括上述的一种或多种或其合金的催化剂系统。在一种实施方案中，NOx捕集材料可以包括碱金属、碱土金属例如钡、钙、钾或钠中的至少一种。
摘要（英）：

One embodiment of the invention includes a method of treating a gas stream comprising flowing the gas stream over a hydrocarbon reduction and NOx reduction catalyst first, and thereafter flowing the gas over a perovskite and NOx trap material for NOx oxidation and storage. In one embodiment, the hydrocarbon reduction and NOx reduction catalyst may include palladium. In one embodiment, the perovskite catalyst may have the general formula ABO3, AA'BO3, ABB'O3, or AA'BB'O3. The perovskite catalyst may be the only catalyst or a second non-perovskite catalyst may include at least one of palladium, platinum, rhodium, ruthenium or a catalyst system including one or more of the same or alloys thereof. In one embodiment, the NOx trap material may include at least one of alkali metals, alkaline earth metals such as barium, calcium, potassium, or sodium.

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