Abstract: A system for conditioning a flow of inlet fluid such as air by modifying its temperature and by removing particulate matter and carbon monoxide. The system includes Peltier effect thermal electric coolers sandwiched to form air passages to both cool air for use in a space and to expel waste heat. The system includes catalytic alumina pellets impregnated with heavy metals that will remove harmful carbon monoxide from the flow of conditioned air at ambient temperatures.

Abstract: Exhaust air containing particulate and gas contaminants is withdrawn from a confined environment, such as a food cooking area, by a circulation system which liquid scrubs some of the contaminants from the exhaust flow, removes mist of the scrubbing liquid from the flow, and then catalyzes or neutralizes gas contaminants into benign gases before discharging the flow back into the confined environment. Removing contaminants in this manner allows a substantial amount of the thermal energy content of the air to be saved for reuse within the confined environment, rather than discharging the thermal energy into the ambient environment.

Abstract: A catalyst for the full oxidation of volatile organic compounds (VOC), particularly hydrocarbons, and of CO to CO2, comprising: a non-stoichiometric crystalline compound conventionally designated by a formula which corresponds to A14Cu24O41 (I), where A is Sr or a solid solution of Sr with alkaline-earth metals, alkaline metals, lanthanides; or a non-stoichiometric crystalline compound conventionally designated by a formula which corresponds to B4Cu5O10 (II), where B is Ca or a solid solution of Ca with alkaline-earth metals, alkaline metals, lanthanides; or mixtures thereof; and in that it is prepared in a form which has a large specific surface area, preferably larger than 25 m2/g; a method for preparing the catalysts; their use in methods for the full oxidation of VOC and of CO to CO2; and the oxidation methods.

Abstract: An odor component in an air is deodorized by an ozone generating member in an ozone an ozone generating area formed in a path through which the air flows, the generated ozone is decomposed by an ozone decomposing member in an ozone decomposing area, and a carbon monoxide, generated in, for example, through incomplete combustion, a CO adsorbing area in the path is adsorbed and carried by a CO adsorbing member. The ozone decomposing area and the CO adsorbing area are formed in a common oxidizing reaction area in which the carbon monoxide is oxidized by using active oxygen generated through the ozone decomposing step in the oxidizing reaction area.

Abstract: Gold oxide is precipitated together with iron oxide from a solution containing a gold source and an iron source; the gel formed thereby is washed, dried, ground to a size range of 0.85 mm to 4.25 mm, calcined and activated by passing a hydrogen and oxygen containing gas through it; then used as a catalyst for oxidizing CO to CO2 in the presence of a large excess of hydrogen.

Abstract: A methanation reactor to reduce carbon monoxide concentration in a reformate stream. The reactor includes a noble metal catalyst supported by a ceramic support such that the reactor preferentially converts of carbon monoxide via methanation over that of carbon dioxide. In one embodiment, the ceramic support is alumina with a coating of silica deposited on the alumina to increase the support surface acidity and consequent carbon monoxide conversion. The purpose of the abstract is to enable the United States Patent and Trademark Office and the public generally to determine from a cursory inspection the nature and gist of the technical disclosure, and is not to be used for interpreting the scope of the claims.

Abstract: Catalysts are described in which an active catalyst is disposed on a low surface area, oxide support. Methods of forming catalysts are described in which a Cr-containing metal is oxidized to form a chromium oxide layer and an active catalyst is applied directly on the chromium oxide layer. Methods of making new catalysts are described in which the surface is sonicated prior to depositing the catalyst. Catalyst systems and methods of oxidation are also described. The inventive systems, catalysts and methods are, in some instances, characterized by surprisingly superior results.

Abstract: Catalyst compositions are provided that are useful in selectively removing carbon monoxide from a hydrogen-containing gas. These catalyst compositions preferably have the formula: nN/Ce1−(x+y+z)AxA′yA″zO2−&dgr;, where A, A′, A″ are independently selected from the group consisting of: Zr, Gd, La, Sc, Sr, Co, Cr, Fe, Mn, V, Ti, Cu and Ni; N is one or more members of the group consisting of: Pt, Pd, and Au; n is a weight percent between 0 and 25; x, y and z are independently 0 to 0.9; x+y+z is 0.1 to 0.9; and &dgr; is a number which renders the composition charge neutral; or nN/(MOx)y(CeO2−&dgr;)1−y, where M is one or more members of the group selected from: Zr, Co, Cr, Fe, Mn, V, Ti, Ni and Cu; N is one or more members of the group selected from: Pt, Pd, and Au; n is a weight percent between 0 and 25; y is 0.1 to 0.9; and x and &dgr; make the compositions charge neutral.

Abstract: There is provided a catalyst containing porous macrostructures comprised of: (a) a three-dimensional network of particles of porous inorganic material (e.g., zeolites); and, (b) at least one metal (e.g., a catalytically active metal). The particles of the at least one macrostructure occupy less than 75% of the total volume of the at least one macrostructure and are jointed together to form a three-dimensional interconnected network. The three-dimensional interconnected network will usually be comprised of pores having diameters greater than about 20 Å. The macrostructures can be made by forming an admixture containing a porous organic ion exchanger (e.g., a polymer-based ion exchange resin) and a synthesis mixture (e.g., for zeolite formation) capable of forming the porous inorganic material and the at least one metal; converting the synthesis mixture to the porous inorganic material; and removing the porous organic ion exchanger from the inorganic material.

Abstract: Provided is a catalyst for selective oxidation of CO gas in a gas of essentially hydrogen, and a method for producing the catalyst. The catalyst is highly active in a relatively high temperature range. The catalyst is for selectively oxidizing CO gas with hydrogen, and this carries ruthenium held on a carrier of titania and alumina, or carries ruthenium with an alkali metal and/or an alkaline earth metal held thereon. For producing the catalyst, a solution containing ruthenium and an alkali metal and/or an alkaline earth metal is applied to the carrier.

Abstract: There is provided a catalyst for a water gas shift reaction in a hydrogen gas which is able to effectively remove CO in the hydrogen gas within a broader temperature range. Such a catalyst for the water gas shift reaction is characterized in that a metal oxide carrier supports at least platinum. The catalyst can be used for removing carbon monoxide in the hydrogen gas. Particularly, such a catalyst can be used in the water gas shift reaction for removing carbon monoxide in a reformed gas in a fuel cell generation system.

Abstract: The invention refers to a process for catalytic, selective oxidation of carbon monoxide in gaseous mixtures containing excess hydrogen with stoichiometric quantity of oxygen at the temperature between 298 K and 573 K, pressure between 1 and 10 bar and at the ratio of oxygen and carbon monoxide partial pressures (&lgr;=2p02/pCO) between 1.0 and 2.5, in a one-step flow reactor at contact time (W/F) between 0.03 and 0.40 g.s.cm−3, or at the flow rate of the gaseous mixture (F) between 0.083 cm3/s and 1.67 cm3/s in the presence of 0.010 to 0.100 g of the catalyst, namely the complex oxide of the formula CuxCe1-xxO2-y, where x is between 0.01 and 0.30 while y is equal or greater than x. This invention refers also to a process for the catalyst preparation and to the catalyst prepared by this process. This invention is useful in the field of fuel technology for low temperature fuel cells.

Abstract: A method of reducing carbon monoxide concentration of mixed gas containing hydrogen, carbon monoxide and oxygen comprises a step of preparing a carbon monoxide removing device having a carbon monoxide concentration reducing catalyst in which a transition metal element is included and a carbon monoxide adsorption amount is adjusted from 0.1 to 3 mL/cat.g, and a step of supplying the mixed gas to the carbon monoxide removing device at a space velocity of 15000 to 300000 h−1 and a temperature of 100 to 300° C.

Abstract: Disclosed is a mixed oxide catalyst, preferably for selective oxidation of CO in hydrogen rich gas mixtures, or in oxygen containing gas mixtures in the presence of water and carbon dioxide, comprising about 15 to 30 at.-% Cu, about 55 to 77 at.-% Mn and about 7.5 to 10 at.-% Ce.

Abstract: The present invention involves a system and method of oxidizing carbon monoxide in a preferential oxidizer for a hydrogen reformer of a fuel cell system for vehicular and stationary applications. The method includes providing a heat exchange system of the preferential oxidizer, wherein the heat exchange system has a single integrated oxidation reaction region in which an oxidation catalyst is disposed for oxidizing carbon monoxide to carbon dioxide. The method further includes introducing a hydrogen-rich reformate to the heat exchange system, wherein the hydrogen-rich reformate is at a predetermined temperature and has a first content of carbon monoxide. The method further includes injecting oxygen to the hydrogen-rich reformate, wherein the oxygen is at a predetermined stoichiometric oxygen/carbon monoxide ratio.

Abstract: Process for treatment of gases which are exhausted through a sinter bed in a sintering plant, wherein a distinction can be made between a cold zone of the sintering plant with relatively low gas temperatures and a hot zone of the sintering plant with substantially higher gas temperatures. The gases from the cold zone of the sintering plant and the gases from the hot zone of the sintering plant are exhausted and treated as separate partial flows.

Abstract: The invention disclosed is a method for the reduction of carbon monoxide to carbon dioxide in a gas stream comprising carbon monoxide, hydrogen and water vapor, wherein the carbon monoxide and hydrogen have a mole ratio greater than 5:1, with substantially reduced methanation. The invention utilizes a reactor having at least one channel having a catalyst positioned thereon and a flow rate of the gas stream over the catalyst such that a boundary layer having a thickness less than a maximum thickness boundary is created.

Abstract: The present invention discloses a catalyst useful in converting carbon monoxide and water to hydrogen and carbon dioxide (water gas shift reaction), which includes a metal oxide carrier and 0.1-10% Pt and 0-5% Re supported on the carrier, based on the weight of the carrier. The carrier contains copper oxide, alumina, and a metal oxide selected from zinc oxide, chromium oxide and magnesium oxide. The present invention also discloses a method for reducing the content of carbon monoxide in a hydrogen-rich reformate gas.

Abstract: In operating the carbon monoxide removal reactor or the fuel reforming system, there is provided a technique for removing carbon monoxide in a stable manner for an extended period of time.

Abstract: The present invention provides a catalyst for oxidizing reformed gas, which catalyst can selectively oxidize carbon monoxide—which is contained in the reformed gas used as a fuel of a solid polymer fuel cell and which acts as a catalyst poison of the fuel cell—into carbon dioxide with high performance. The reformed gas is oxidized by use of the catalyst of the present invention, which catalyst is characterized in that M-type mordenite, among different types of zeolite, is used as a carrier and a bimetallic alloy metal system containing platinum and an alloy-forming metal other than platinum is supported by the carrier, wherein the amount of the alloy-forming metal in the alloy is 20-50 at. %.

Abstract: A catalyst for removing carbon monoxide (CO) in a hydrogen rich gas according to a water gas shift reaction is provided, which is characterized in that platinum and rhenium are supported on rutile titania as a support. This catalyst provides a high CO conversion at a relatively low reaction temperature between 200° C. and 300° C. and is excellent in cost/performance due to a reduction in amount of supported platinum. It is preferred that a weight ratio of an amount of supported platinum to an amount of supported rhenium is in a range of 3:1 to 1:1, and particularly 3:2. In addition, when the catalyst is produced by supporting rhenium first and then platinum on the support, the catalyst performance can be remarkably improved.

Abstract: In a method for operating a flue gas purification plant (10) comprising a plurality of parallel of absorber chambers (11), in which in each absorber chamber (11), CO and NO are simultaneously oxidized by means of a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2 is absorbed on the catalyst surface, in which SO2 is furthermore oxidized by means of a catalyst in a second absorber (14) upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3 is absorbed on the catalyst surface, the absorber chambers (11) are successively regenerated by means of a regeneration gas containing hydrogen and/or hydrogen compounds in regularly repeating regeneration cycles affecting all the absorber chambers (11).

Abstract: In a method for operating a flue gas purification plant (10) with at least one absorber chamber (11), in which CO and NO are simultaneously oxidized by means of a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2 is absorbed on the catalyst surface, and in which SO2 is furthermore oxidized by means of a catalyst in a second absorber (14) upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3 is absorbed on the catalyst surface, the absorber chamber (11) is disconnected from the flue gas stream in regularly repeating regeneration cycles and regenerated by means of a regeneration gas containing hydrogen and/or hydrogen compounds, the two absorbers (14, 15) of the absorber chamber (11) being regenerated in succession and regeneration gas being injected into the absorber chamber (11) between the two absorbers (14, 15).

Abstract: Carbon monoxide in reformate gas is removed by oxidizing reactions in a plurality of catalytic components (4A-4C) disposed in series. Air from air supply valves (6A-6C) is supplied to the catalytic components (4A-4C). The oxidation amount of carbon monoxide in the catalytic components (4A-4C) depends on air supply flow rates of the air supply valves (6A-6C). A controller (7) controls the air supply valves (6A-6C) so that the ratio of the air supply flow rate to an upstream component (4A) with respect to the air supply flow rate to a downstream component (4C) decreases as a flow rate of reformate gas decreases. In this manner, reverse shift reactions generating carbon monoxide as a result of reactions between carbon dioxide and hydrogen contained in the reformate gas can be suppressed in the downstream catalytic component (4C) when the flow rate of reformate gas is low.

Abstract: A process for the selective oxidation of carbon monoxide in a hydrogen-rich gas stream, wherein a mixture comprising the hydrogen-rich gas stream and a molecular oxygen-containing gas is contacted with a monolithic structure of a material having a thermal conductivity of at least 30 W/m.K, which monolithic structure is provided with a catalyst for the selective oxidation of carbon monoxide, at a gas velocity such that the flow through the monolithic structure is laminar. The invention further relates to a reactor comprising such a monolithic structure, wherein particles of the catalyst are contained in the monolithic structure.

Abstract: According to the present invention, a temperature profile within a preferential oxidation reactor is controlled using a two phase water/steam system to provide a temperature range within the reactor (10) which favors the selective oxidation of CO in a hydrogen rich reformate stream. The reformate is flowed in a mixture with oxygen over a preferential oxidation catalyst (17). The temperature profile is controlled by flowing a stream of water proximate to the preferential oxidation catalyst (17) so as the stream of water and the reformate stream passing over the catalyst (17) are in a heat transfer arrangement. The stream of water is maintained as a two phase stream from a point at which the water reaches its boiling temperature to a point proximate an outlet from which the stream of water exits the reactor (10).

Abstract: A carbon monoxide removing catalyst such as a ruthenium supporting catalyst is provided for removing, through oxidation thereof, carbon monoxide from an alcohol reformed gas containing hydrogen and carbon monoxide to be supplied to a fuel cell. For its activation, the catalyst is caused to contact an inactive gas or a hydrogen-containing inactive gas consisting of less than 50 volume % of hydrogen gas and the remaining volume of inactive gas, thereby to avoid poisoning of the electrode of the fuel cell with carbon monoxide.

Abstract: A process for treating exhaust gas from internal combustion engines wherein the combustion exhaust gas contains HC, CO, O2, soot and possibly NOx. In treating the combustion exhaust gas, HC is oxidized to COx and H2O: NO, if present, is oxidized to NO2 and soot is oxidized by reaction with NOx. In addition, NOx is generated by oxidizing ammonia and NOx is introduced into the exhaust gas upstream of the oxidization of soot by reaction with NOx.

Abstract: Process for the preferential oxidation of carbon monoxide and/or CH3OH in a hydrogen containing process stream by contacting the process stream with a catalyst comprising gold on a support comprising non-reducible magnesium aluminium oxide in form of MgAl2O4 spinel.

Abstract: Carbon monoxide and carbonyl sulfide emissions are reduced in manufacturing processes, including titanium tetrachloride production processes. Gas is contacted with CO, COS, and an oxygen-containing gas with a suitable catalyst. The catalyst may be a metal oxide catalyst containing bismuth, cobalt and nickel, a xerogel or aerogel catalyst containing Au, Rh, Ru and Co in aluminum oxide/oxyhydroxide matrices, or a supported metal catalyst that contains at least one metal from the group Pd, Rh, Ru and Cu. In the latter case, the catalyst support is contains alumina or carbon. A catalyst composite of Au, Rh, Ru and Cr, and cerium oxide and lanthanum oxide may also be used.

Abstract: Oxides of carbon and other impurities are removed from a hydrogen fuel supply stream (12) for a fuel cell (30). A getter element (20) sufficient for chemisorbing the oxides of carbon from the hydrogen is removably connected to the fuel cell anode side. The fuel stream is passed through the getter element so as to chemisorb the oxides of carbon onto the getter, thereby providing a purified stream of hydrogen (26) to the fuel cell anode. The getter is removed from the fuel cell when the getter is spent and replaced with a fresh getter.

Abstract: A catalytic composition and method of making the same in which a catalytic material has an average pore size distribution sufficiently large to substantially prevent capillary condensation.

Abstract: An apparatus for preferential oxidation of carbon monoxide in a reformate flow includes a reactor defining a flow path for a reformate flow; at least one catalyst bed disposed along the flow path; and a distributor for distributing oxygen from an oxygen source to the at least one catalyst bed, the distributor including a conduit positioned at least one of upstream of and through the at least one catalyst bed, the conduit having a sidewall permeable to flow of oxygen from within the conduit to the at least one catalyst bed.

Abstract: A multi-stage shift reactor reduces a carbon monoxide content in a hydrogen-rich gas mixture stream flowing through the shift reactor in a flow direction. At least two catalyst carrier bodies have a honeycomb structure with passages through which the gas mixture stream can flow and are disposed in succession along the gas mixture stream flow direction. At least one heat exchanger is disposed between the at least two catalyst carrier bodies. Such a shift reactor is particularly suitable for the highly dynamic carbon monoxide conversion in a mobile fuel cell system. A method for reducing a carbon monoxide content in a hydrogen-rich gas mixture stream is also provided.

Abstract: The invention relates to a method for the selective catalytic oxidation of carbonmonoxide (CO) in H2-rich, CO2- and H2-containing gases in the presence of a noble metal catalyst on an alumina carrier with the addition of air as oxidizing agent. According to the invention, with this method &agr;-AL2O3 carrier can be less than 25 m2/gram. The noble metal can be ruthenium or platinum and preferably a combination of ruthenium (Ru) and platinum (Pt), the sum of the quantities of RU and Pt being less than or equal to 1.0% (m/m).

Abstract: Reducing the size of a water-gas-shift reactor by injecting oxygen into the tail section thereof to react the oxygen with CO in the tail section without consuming untoward amounts of hydrogen.

Abstract: The present invention relates to a gas processing agent for removing carbon monoxide, hydrogen, carbon dioxide and water vapor in a gas at the same time, which can maintain a high oxidation activity and have a long life time, a manufacturing method therefor and a gas purification method. More specifically, the present invention relates to a gas processing agent made of a catalyst made of an inorganic porous material layer containing at least one selected from a group consisting of platinum, palladium, rhodium and ruthenium, or oxides thereof and an adsorbent, and a manufacturing method therefor, a gas purifier, a gas purification method and a gas purification apparatus using the gas processing agent.

Abstract: Process and reaction unit for isothermal shift conversion of a carbon monoxide containing feed gas, the process comprising the steps of

Abstract: The present invention provides a process of selectively oxidizing carbon monoxide in a reformate stream comprising the steps of passing a fuel stream comprising hydrogen and carbon monoxide into a reaction chamber wherein the reaction chamber contains an effective amount of at least one catalyst to promote oxidation of said carbon monoxide to carbon dioxide; supplying an oxygen-containing stream into said reaction chamber; and periodically interrupting the flow of said oxygen-containing stream into said reaction chamber. In one embodiment of the invention, the oxygen-containing stream is interrupted for a predetermined duration of time. In general, it was found that more frequent short interruptions of the oxygen flow produced a consistently lower carbon monoxide level than less frequent longer interruptions. The interruption in oxygen flow may also be triggered upon an increase in carbon monoxide concentration within the reaction chamber.

Abstract: A catalyst for selective oxidation of carbon monoxide present in a hydrogen-containing gas is provided in which the catalyst comprises ruthenium supported on an alumina hydrate. This catalyst has a high selective oxidation activity to carbon monoxide. A carbon monoxide elimination method using this catalyst is also provided. In this method, to a gas containing at least hydrogen and carbon monoxide and being richer in the hydrogen than the carbon monoxide on the basis of volume, oxygen is added in an amount necessary for oxidizing at least part of carbon monoxide present in that gas, and thereafter the gas to which the oxygen has been added is brought into contact with the catalyst described above. Also provided is a solid polymer electrolyte fuel cell system that utilizes this method.

Abstract: A method of purifying bleed air from an engine heats the bleed air only to an extent necessary for the bleed air to react under catalysis from a noble-metal-based reactor bed, converting the contaminants to filterable form. The contaminants are then removed with a post-treatment filter. A purifier functioning according to the present invention, which heats the bleed air to a temperature no greater than 450° F. which it attains without a combustor, thus releases less heat to adjoining components than a prior-art purifier, and outputs purified air at a lower temperature than does a prior-art purifier, which typically needs to include a combustor. The purified air is sufficiently cool as to be suitable for immediate release into interior compartments occupied by humans or the air conditioning system.

Abstract: A platinum group metal three-way conversion catalyst composition containing a high temperature catalytic component and a low temperature catalytic component has each catalytic component present as separate distinct particles in the same washcoat layer. The catalyst composition is prepared from a washcoat slurry containing a high temperature catalyst support material, and a low temperature catalyst support material, each support material being of sufficiently large particle size so as to prevent each support material forming a solution or a sol with the liquid medium of the slurry. The platinum group metal or metals can be impregnated into each support material either after formation of the washcoat on a non-porous refractory, metallic or palletized substrate or before forming the washcoat slurry.

Abstract: Conventional hydrogen purification apparatuses cannot be used satisfactorily for applications in which much time is required for startup of the apparatus, and the apparatus is repeatedly started and stopped at frequent intervals because of complicated handling.

Abstract: Exhaust gas to be cleaned is introduced into a conversion and mixing duct and the exhaust gas flows through the duct along a predetermined longitudinal direction. A reducing agent, such as aqueous urea solution, is injected into the exhaust gas stream in the conversion and mixing duct. The exhaust gas stream is then deflected into a reaction duct which extends parallel to or coaxially around the conversion and mixing duct. The exhaust gas then flows in the opposite direction through the reaction duct. A reduction catalyst is disposed in the reaction duct, where the reducible components of the exhaust gas are reduced. The exhaust gas cleaned in this manner is then discharged from the reaction duct.

Abstract: The present invention has an object to more enhance the efficiency of the purification of the CO-containing exhaust gases with a catalytic-component-supporting type catalyst, particularly, to enable both achievement of high purification efficiency and long-term stable maintenance of high purification efficiency without increasing the quantity of the catalytic component as supported. As a means of achieving this object, a process for purification of exhaust gases, according to the present invention, is a process for purification of exhaust gases to remove CO therefrom, and is characterized by comprising the step of bringing the exhaust gases into contact with a catalyst layer at a temperature of 250 to 600° C., a pressure drop of not more than 100 mmH2O, and a linear velocity of 0.5 to 10 m/s, wherein the catalyst layer includes a honeycomb-structural catalyst having an opening size of 1.0 to 3.0 mm, an opening ratio of 60 to 80%, and an inner wall thickness of less than 2 mm.

Abstract: Method and apparatus for treating the atmosphere to lower the concentration of pollutants, such as ozone, hydrocarbons, nitrogen oxides, sulfur oxides, carbon monoxide and the like, therein in which ambient air is passed into operative contact with a stationary substrate such as an automobile at rest, a billboard, an air conditioning unit, a transportation tunnel and the like, the stationary substrate having at least one ambient air contacting surface having a pollutant treating composition, such as manganese compounds, copper compounds, platinum group metals and compounds thereof, precious metals, and the like, thereon.

Abstract: System for removal of targeted pollutants, such as oxides of sulfur, oxides of nitrogen, mercury compounds and ash, from combustion and other industrial process gases and processes utilizing the system. Oxides of manganese are utilized as the primary sorbent in the system for removal or capture of pollutants. The oxides of manganese are introduced from feeders into reaction zones of the system where they are contacted with a gas from which pollutants are to be removed. With respect to pollutant removal, the sorbent may interact with a pollutant as a catalyst, reactant, adsorbent or absorbent. Removal may occur in single-stage, dual-stage, or multi-stage systems with a variety of different configurations and reaction zones, e.g., bag house, cyclones, fluidized beds, and the like. Process parameters, particularly system differential pressure, are controlled by electronic controls to maintain minimal system differential pressure, and to monitor and adjust pollutant removal efficiencies.

Abstract: Apparatus and process for removing carbon monoxide from a gas stream comprising a major portion of an inert gas and a minor portion of carbon monoxide are provided. The process involves contacting a feed gas stream with at least a primary metal oxide in a reaction zone of a reactor vessel at conditions effective to convert substantially all of the carbon monoxide to carbon dioxide, thus producing a purified gas stream consisting essentially of the inert gas and carbon dioxide and substantially free of carbon monoxide.

Abstract: The invention described herein involves a novel approach to the production of oxidation/reduction catalytic systems. The present invention serves to stabilize the tin oxide reducible metal-oxide coating by co-incorporating at least another metal-oxide species, such as zirconium. In one embodiment, a third metal-oxide species is incorporated, selected from the group consisting of cerium, lanthanum, hafnium, and ruthenium. The incorporation of the additional metal oxide components serves to stabilize the active tin-oxide layer in the catalytic process during high-temperature operation in a reducing environment (e.g., automobile exhaust). Moreover, the additional metal oxides are active components due to their oxygen-retention capabilities. Together, these features provide a mechanism to extend the range of operation of the tin-oxide-based catalyst system for automotive applications, while maintaining the existing advantages.

Abstract: The present invention relates to non-noble metal combustion catalyst for carbon monoxide comprising Cu—Al/Ce—Al complex oxides and aluminum oxide support. The catalysts comprise Ce—Al complex oxide and Cu—Al complex oxide successively loaded on the aluminum oxide support, wherein the loading weight ratio is 0.02-0.10 for Ce—Al—O/Al2O3 and 0.05-0.15 for Cu—Al—O/Al2O3, and the Cu—Al complex oxide is dispersed in cluster form on the surface of the aluminum oxide support pre-covered with high dispersed nanoparticles of the Ce—Al complex oxide. Furthermore, the present invention relates to a process for preparing the catalysts and their use as combustion promoter with high catalytic activity, high hydrothermal stability and ability of reducing NOx exhaust in the fluid catalytic cracking (FCC) process of petroleum refining.