摘要:
The invention relates to a method for purifying a gas flow containing hydrogen (H2) and carbon monoxide (CO), in addition to at least one nitrogen oxide (NOx), as impurities. According to said method, the gaseous flow is brought into contact with at least one catalyst containing copper and/or palladium, at a temperature between 100 DEG C. and 200 DEG C., in such a way as to eliminate at least part of the nitrogen oxide.
摘要:
Process for purifying or separating a gas or gas mixture using a monolithic adsorbent for the separation or purification of gases or gas mixtures, having a cellular structure with open porosity in the form of a solid foam permeable to the gas molecules. The gas phase of the adsorbent possesses an essentially convex structure and the solid phase an essentially concave structure. The solid foam has a density of greater than or equal to 500 kg/m3 and an open porosity of between 20 and 60%. The gas is air or an H2/CO mixture. The process is of the VSA, PSA or TSA type. This process can be used in particular in OBOGS-type systems to supply passengers of the vehicle or a device participating in the traction of the vehicle and/or in its electrical supply, in particular a fuel cell. This process can also be used in medical oxygen concentrators.
摘要翻译:使用用于分离或纯化气体或气体混合物的整体式吸附剂来纯化或分离气体或气体混合物的方法,其具有以气体分子可渗透的固体泡沫形式的开放孔隙度的多孔结构。 吸附剂的气相具有基本上凸的结构,固相基本上是凹的结构。 固体泡沫具有大于或等于500kg / m 3的密度和20-60%的开孔率。 气体是空气或H 2 CO 2混合物。 该过程是VSA,PSA或TSA型。 该过程可以特别用于OBOGS型系统中,以供应车辆的乘客或参与车辆牵引和/或其电源,特别是燃料电池的设备。 该过程也可用于医用氧气浓缩器。
摘要:
A roof rack assembly is provided for a motor vehicle roof having a front support, a central support, and a rear support disposed along each longitudinal side thereof. The roof rack assembly includes a stationary rail fixedly secured to and extending longitudinally between the central and rear supports along each side of the roof. Each of the stationary rails defines a length. First and second adjustable rails are movable between a side rail position, in which the first and second adjustable rails extend longitudinally between the front support and the central support along each side of the roof, and a cross rail position, in which the first and second adjustable rails extend transversely across the roof. At least one of the first and second adjustable rails extends between the stationary rails for selective positioning along the length of the stationary rails.
摘要:
Zeolite adsorbent, and method of production, exchanged with calcium and barium cations, for purifying or separating a gas or gas mixture, in particular air, so as to remove therefrom the impurities found therein, such as hydrocarbons and nitrogen oxides (NxOy). The adsorbent is preferably an X or LSX zeolite and the gas purification process is of the TSA type.
摘要翻译:沸石吸附剂和与钙和钡阳离子交换的生产方法,用于净化或分离气体或气体混合物,特别是空气,以便从其中除去其中发现的杂质,例如烃和氮氧化物(N, x O y)。 吸附剂优选为X或LSX沸石,气体净化处理为TSA型。
摘要:
A process for purifying a gas stream containing at least one impurity chosen from the group formed by propane, nitrogen protoxide and ethylene, in which process: (a) the gas stream to be purified is brought into contact with at least one adsorbent including at least one X zeolite containing barium cations; (b) at least one impurity is adsorbed on the adsorbent. Preferably, the adsorbent includes particles of X zeolite exchanged to at least 70%, preferably at least 89%, with barium cations, it being possible for the adsorbent to furthermore include a bed of activated alumina particles which is located upstream of the bed of barium-exchanged X zeolite.
摘要:
A process, particularly of the TSA type, for separating impurities of the nitrogen protoxide (N2O) and possibly carbon dioxide (CO2) or ethylene (C2H4) type which are contained in a gas stream, such as air. The impurities of nitrogen protoxide type are removed on a faujasite zeolite having a Si/Al ratio of 1 to 1.5 and containing from 0 to 35% of K+ cations, between 1 and 99% of Na+ cations and between 1 and 99% of Ca2+ cations, preferably at least 50% of Ca2+ cations. The separation is preferably carried out at a temperature of approximately −40° C. to +80° C., preferably at room temperature. Advantageously, the process is employed for prepurifying atmospheric air before cryogenic distillation of the air thus prepurified.
摘要:
A PSA or VSA process for separating a gas flow, such as air, containing at least one first gas compound, such as nitrogen, which is preferentially adsorbed on at least one adsorbent, and at least one second gas compound, such as oxygen, which is adsorbed less preferentially on at least the one adsorbent than the first gas compound. The adsorbent used comprises particles of faujasite zeolite having a Si/Al ratio
摘要:
A PSA process for the separation of a feed gas, for example air, containing at least one first component, such as nitrogen, and a second component, such as oxygen, by preferential adsorption of the first component at a high adsorption pressure, on at least one bed of particles of an adsorbent material and recovery of a gas flow enriched in the second component, with desorption of the first component at a low desorption pressure. The ratio (.mu./.sigma.) of the mean granulometry (.mu.) of the adsorbent particles contained in the bed, to the breadth of granulometric distribution (.sigma.) of the particles, is comprised within the range 1.5 to 15, the particles of adsorbent material being particles of zeolite, such as zeolite X or zeolite LSX, exchanged by metallic cations, preferably cations of lithium and/or calcium.
摘要:
A process for the separation of a gas mixture containing oxygen and nitrogen, including bringing the mixture into contact in an adsorption zone with a first selective adsorbent for nitrogen of faujasite type exchanged to at least 80% with lithium, in which the Si/Al ratio is lower than 1.5 and a second selective adsorbent for nitrogen of zeolite type exchanged with divalent cations such as the alkaline-earth metal or transition metal cations. The second adsorbent is characterized by a nitrogen adsorptivity C.sub.2 lower than the nitrogen adsorptivity C.sub.1 characterizing the first adsorbent, and an adsorption selectivity for nitrogen in relation to oxygen (1.times.10.sup.5 Pa, 20.degree. C.) higher than or equal to 3.
摘要:
PSA process for the separation of nitrogen from a gaseous mixture containing nitrogen by selective adsorption of nitrogen from the gaseous mixture in an adsorbent mass with cyclic pressure variations. At least one nitrogen adsorption phase is carried out at high pressure and at least one nitrogen desorption phase is carried out at low pressure. The adsorbent mass is arranged in a rotating adsorber and at least 50% of the adsorbent mass is constituted by a zeolite exchanged with lithium by more than 50%.