摘要:
A NOx, catalyst combination for treating a lean exhaust gas stream comprising an alkaline earth-alumina catalyst and an alkaline earth-zeolite catalyst, arranged on a substrate such that the gas stream first contacts the alkaline earth-alumina catalyst prior to contacting the alkaline earth-zeolite catalyst.
摘要:
A poison resistant lean NOx catalyst comprising: a protective coating of a first catalyst support material including a metal-zirconium phosphate component, coated on a second NOx occluding catalyst material.
摘要:
A catalyst for adsorbing oxides of nitrogen from the exhaust gases of an internal combustion engine, comprising an alkaline earth active catalyst site, and a transition metal oxide having a surface area of at least about 75 m2 /g.
摘要:
In one embodiment, a method of treating a gas stream comprises: controlling an amount of the NH3 entering a catalytic unit and converting NO2 and the NH3 to N2 in the catalytic unit, wherein greater than or equal to about 60 wt % of NOx initially in the gas stream is converted to N2. In one embodiment, a gas treatment system comprises: a plasma reactor disposed downstream of an engine; a cracking catalyst disposed downstream of the engine; and a catalytic unit capable of converting NO and HC to NH3, and capable of converting NH3 and NO2 to N2.
摘要:
A NOx control for an exhaust is provided. The NOx control includes a nickel compound and a NOx adsorber. Systems for treating an exhaust gas are also provided, including use of a non-thermal plasma reactor and a NOx control, and optionally a particulate trap.
摘要翻译:提供了用于排气的NO sub> x SUB>控制。 NO x控制包括镍化合物和NO x x吸附剂。 还提供了用于处理废气的系统,包括使用非热等离子体反应器和NO x控制,以及任选的颗粒捕集器。
摘要:
A non-thermal plasma (NTP) reactor structural conductor element includes a base conductor support and a high dielectric constant (“high k”) barrier layer supported by and substantially surrounding the base conductor support to form a structural conductor NTP reactor element. The structural conductor element may comprise a variety of shapes such as plates, sheets, half-box, I shapes, C shapes, or comb shapes, among others. In one embodiment, the dielectric barrier layer includes a coating applied to the base conductor support. In another embodiment, the dielectric barrier layer includes a high k film laminated to the base conductor support. In yet another embodiment, the base conductor support integrally forms the dielectric barrier layer via conversion of surfaces of the base conductor using electrochemical, thermal or chemical means to form the dielectric barrier layer.
摘要:
One embodiment of a non-precious metal catalyst for treating an exhaust gas stream comprises an alkali metal oxide component comprising lithium oxide, in combination with an alkaline earth support component, wherein the alkaline earth support component is an alkaline earth zeolite catalyst, an alkaline earth alumina catalyst, or a mixture thereof. Another embodiment of a non-precious metal catalyst for treating an exhaust gas stream comprises a substrate supporting a coating having more than about 6 weight percent of a lithium oxide component in combination with less than about 49 weight percent of an barium zeolite catalyst component and less than about 42 weight percent of a barium alumina catalyst component and not more than about 7 weight percent of a ceramic oxide binder.
摘要:
An exhaust manifold includes an exhaust conduit having an inner surface, and an aluminide layer disposed on at least a portion of the inner surface of the manifold. The exhaust manifold is made by applying aluminum on an inner surface of the manifold and oxidizing to form the aluminide layer.
摘要:
A gas treatment device, comprises a substrate disposed within a shell. The substrate comprises a catalyst composition comprising a support, a catalyst, and a sufficient amount of SMSI material such that, upon exposure to a gas stream (at a gas treatment device operating temperature), less than or equal to about 35 wt % of hydrocarbons in the gas stream are burned. A method for forming a gas treatment device, comprises applying a slurry to a substrate, wherein the slurry comprises a support and a sufficient amount of SMSI material such that, upon exposure to a gas stream at a gas treatment device operating temperature, greater than or equal to about 50 wt % of hydrocarbons in the gas stream are cracked to a light fraction; applying a catalyst to the substrate; calcining the catalyst; and disposing the calcined substrate into a shell, with a retention material disposed between the shell and the calcined substrate.
摘要:
A system and method for treating a combustion exhaust stream includes admitting an exhaust stream into a non-thermal plasma reactor having at least one segmented non-thermal plasma element including a plurality of individually energizable electrode segments defining a plurality of corona volumes. In a preferred embodiment, the electrode segments are progressively smaller in size in the exhaust flow direction to provide optimum plasma volume variation. Individually energizable electrodes are selectively activated to effect variable corona volumes for treating an exhaust stream. Additional reactor segments are activated only as needed, such as during periods of high exhaust flow, for efficient treatment of the exhaust stream so as to maintain optimized high space velocity in the active corona volume. The segmented elements may comprise a variety of shapes. The system and method are particularly suitable for gas pretreatment and downstream diesel particulate filter regeneration.