Abstract: A catalyst for decomposing volatile organic compounds is provided. The catalyst includes a mesoporous material and silver carried by the mesoporous material. The invention also provides a method for decomposing volatile organic compounds. The method includes providing a gas containing volatile organic compounds and contacting the gas containing volatile organic compounds and the disclosed catalyst to decompose and oxidize the gas containing volatile organic compounds into carbon dioxide and water.

Abstract: Exhaust air containing particulate and carbon monoxide gas contaminants is withdrawn from a confined environment, such as a food cooking area, by a circulation system which liquid scrubs particulate contaminants from the exhaust flow, removes liquid mist from the flow, and then catalyzes or neutralizes the carbon monoxide gas contaminants into benign carbon dioxide 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 exhaust air to be saved and reused within the confined environment, rather than discharging the thermal energy into the ambient environment.

Abstract: A process of a catalytic combustion is disclosed. The process can be started at a cold temperature and then raised to a desired high temperature in a very short time by employing a noble metal catalyst dispersed on a supporting material. Moreover, a method for dispersing a noble metal catalyst used in the catalytic combustion is also disclosed for increasing a specific surface area of the catalyst so as to facilitate the catalytic combustion. Furthermore, a substance including a promoter dispersing a metal catalyst therewith, and a supporting material supporting the promoter with the metal catalyst is also disclosed, so that a contact surface area of the metal catalyst can be increased, thereby the catalytic combustion can be initiated within a very short period.

Abstract: In accordance with the present invention, there are provided simplified systems and methods for catalytically deactivating, removing, or reducing the levels of reactive component(s) from the vapor phase of fuel storage tanks. The simple apparatus described herein can be utilized to replace complex OBIGGS systems on the market. Simply stated, in one embodiment of the invention, the vapor phase from the fuel tank is passed over a catalytic bed operated at appropriate temperatures to allow the reaction between free oxygen and the fuel vapor by oxidation of the fuel vapor, thus deactivating reactive component(s) in the gas phase.

Abstract: Reactive diluent fluid (22) is introduced into a stream of synthesis gas (or “syngas”) produced in a heat-generating unit such as a partial oxidation (“POX”) reactor (12) to cool the syngas and form a mixture of cooled syngas and reactive diluent fluid. Carbon dioxide and/or carbon components and/or hydrogen in the mixture of cooled syngas and reactive diluent fluid is reacted (26) with at least a portion of the reactive diluent fluid in the mixture to produce carbon monoxide-enriched and/or solid carbon depleted syngas which is fed into a secondary reformer unit (30) such as an enhanced heat transfer reformer in a heat exchange reformer process. An advantage of the invention is that problems with the mechanical integrity of the secondary unit arising from the high temperature of the syngas from the heat-generating unit are avoided.

Abstract: A method for processing an organic solvent-containing air is disclosed. The method can be operated in spite of a rapid fluctuation of the concentration of the organic solvents in the air to be processed, specifically, the method does not increase the organic solvent content in the air to be emitted into the atmosphere after processing, even if the concentration of the organic solvents rapidly changes. The method comprises carrying out simultaneously and continuously an adsorbing-removing step, a regenerating step, and a combustion step, while mixing a purified air produced in the adsorbing-removing step with an exhaust gas from a combustion furnace produced in the combustion step, and decomposing the organic solvents in the mixture by oxidation.

Abstract: The present invention relates to a metal ionic catalyst composition for the catalytic conversion of industrial pollutants and the process of preparation of the same. The present invention also relates to a process of coating of the said catalyst composition on a cordierite honeycomb.

Abstract: A layered three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Engine exhaust treatment system and methods of using the same are also provided. In one or more embodiments, the catalyst supported on a carrier has three layers, where at least two of the layers are zoned to have an oxygen storage component being present in an upstream zone in an amount that is less than the oxygen storage component present in the downstream zone.

Abstract: A lean NOx trap composition. The lean NOx trap composition utilizes ruthenium in place of higher cost metals such as platinum. The lean NOx trap composition provides high NOx storage efficiency and high NOx conversion efficiency when incorporated in a lean NOx trap. A method of removing harmful gases using the lean NOx trap composition is also described.

Abstract: The processing of gases, in particular the exhaust gas of an internal combustion/diesel engine, entails catalytically oxidizing the carbon monoxide and hydrocarbons contained therein in an oxygen-rich medium, in the presence of a metal oxidation catalyst that includes a silica-containing zirconia support.

Abstract: A fibrous catalytic filter can be used for treating a fluid stream containing particulate matter. The fluid stream is contacted with fibers comprising a catalytic composition. The particulate matter deposits on the fibers and undesirable species within the fluid stream are converted into more desirable species via the catalytic action of the fibers.

Abstract: Provided herein is a non-single phase perovskite-type bulk material comprising one or more of Ru and Ir. In one embodiment, the surface region of the material is enriched with one or more of Ru and Ir relative to the bulk material. Also provided are methods for preparing the non-single phase, surface enriched perovskite-type material, catalytic articles comprising the non-single phase, surface enriched perovskite-type material and methods for their preparation, and methods for treating exhaust emissions using the non-single phase, surface enriched perovskite-type material.

Abstract: An exhaust treatment device and a method of conditioning the device that include a reactive compound capable of undergoing an endothermic reaction are described. A method of manufacturing the device is also disclosed.

Abstract: A method for processing an organic solvent-containing air capable of being operated in spite of a rapid fluctuation of the concentration of organic solvents in the air to be processed and capable of using a combustion furnace exhaust gas as an air for regenerating dehumidifying member is provided. The method comprises carrying out simultaneously and continuously a dehumidification step (a), an adsorption-removing step (b), an adsorbing member-regeneration step (c), a combustion step (d), and a dehumidifying member-regeneration step (e) comprising mixing the adsorption-treated air produced in the adsorbing-removing step (b) with a combustion furnace exhaust gas produced in the combustion step (d) to obtain a mixed gas, decomposing the organic solvents in the mixed gas by oxidation, and causing the resulting purified gas to flow through the dehumidifying member which has adsorbed moisture, thereby regenerating the dehumidifying member.

Abstract: A method of servicing a catalytic reactor system, comprising an abatement of at least one hazardous substance from the catalytic reactor system while preserving activity of a catalyst contained therein. A method of servicing a catalytic reactor system, comprising oxidizing the catalytic reactor system at a temperature of from about 350° F. to about 500° F. to abate at least one hazardous substance from the catalytic reactor system and reducing servicing time by about 50% of a time required for complete regenerative oxidation of the catalytic reactor system. A method of servicing a catalytic reactor system, comprising abating at least one hazardous substance from the catalytic reactor system such that a fouling rate of a catalyst contained therein is substantially the same before and after the servicing.

Abstract: An alumina-based perovskite is formed by mixing a lanthanide source with a transitional alumina to form a dual-phase composition comprising in situ formed LnAlO3 dispersed in alumina. The lanthanide content of the composition ranges from about 12 to 24 wt. % to yield a high surface area composition which is useful as a catalyst or catalyst support such as for precious metals.

Abstract: The invention provides a process and system for purification of an exhaust gas stream from a combustion engine containing hydrocarbons, soot, carbon monoxide and sulphur dioxide. The process comprises the steps of oxidising the hydrocarbons and part of the soot in a first reactor in the presence of a first catalyst active in oxidising hydrocarbons and soot without oxidising sulphur dioxide and forming a partly purified exhaust gas stream, of cooling of the partly purified exhaust gas stream, of converting the carbon monoxide of the partly purified exhaust gas stream in a second reactor in presence of a second catalyst active in oxidising carbon monoxide without oxidising sulphur dioxide and of withdrawing a purified exhaust gas stream.

Abstract: The invention concerns a composition based on zirconium oxide and cerium oxide and, optionally, an oxide of another rare earth, characterized in that it contains tin oxide in a proportion of more than 25 wt. % of oxide. Said composition is obtained by a method which consists in forming a mixture comprising zirconium, cerium and tin compounds and, optionally a compound of another rare earth; in bringing said mixture in the presence of a basic compound whereby a precipitate is obtained; heating said precipitate in an aqueous medium and calcining same. The composition can be used as catalyst, in particular for treating motor vehicle exhaust gases.

Abstract: A layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. In one or more embodiments, the catalyst comprises three layers in conjunction with a carrier: a first layer deposited on the carrier and comprising palladium deposited on a refractory metal oxide and an oxygen storage component; a second layer deposited on the first layer and comprising rhodium deposited on a refractory metal oxide and an oxygen storage component; and a third layer deposited on the second layer and comprising palladium deposited on a refractory metal oxide.

Abstract: In a method for removing volatile organic components (VOC) from waste gases of a cement clinker kilns installation, in which the largely cooled waste gases are subjected to post-combustion, a post-combustion is carried out to an extent as to ensure a reduction of the concentration of the VOC below the admissible threshold values. The post-combustion is carried out for the production of vapour, whereby the production of vapour in the post-combustion is dimensioned for a gas volume to be post-combusted, ensuring that a partial quantity of the waste gas corresponding to the gas volume allows for the reduction of emitted VOC per unit time in the waste gas below admissible concentration values by rarefaction and whereby this partial quantity is simultaneously dimensioned for the production of a amount of vapour sufficient for the economical operation of a given steam turbine.

Abstract: A thermal oxidizer is provided in which off-gases in a process stream are thermally oxidized within substantially the entire interior volume of an oxidation chamber. The thermal oxidation is conducted without the presence of a flame or with only a minor portion of the fuel being combusted in a flame.

Abstract: Deactivation resistant photocatalysts can be formulated by coating one or more photocatalyst crystals onto a suitable substrate. The photocatalyst crystals are doped with a dopant M. The dopant could be used to repel the silicon-based compound or be used to attract the silicon-based compound. In one embodiment, the dopant can uniformly be distributed in the photocatalyst crystals. In another embodiment, the dopant can be introduced only to photocatalyst crystals between about 0.1 to about 2 nanomenters below the surface of the structure. In another embodiment, the doped photocatalyst crystals can be interdispersed with non-doped photocatalyst crystals.

Abstract: The present invention is directed to an improved apparatus and method of minimizing catalyst poisoning from exhaust gas streams containing inorganic deposits and particulate matter. More specifically, the present invention is directed to an upstream metallic foam trap and a downstream monolithic precious metal catalyst, wherein the trap physically blocks inorganic deposits and particulate matter from poisoning the downstream catalyst. The present invention is also directed to a metallic foam trap containing a coat comprising a first metallic thermal arc sprayed layer and optionally a second refractory metal oxide.

Abstract: A method for treating exhaust gas includes: adsorbing target components in the exhaust gas with an adsorbent (5); introducing a nitrogen gas with an oxygen concentration of 10 vol % or less and a purity of 90 vol % or more into the adsorbent (5); and applying (6, 7, 8) nonthermal plasma to the adsorbent (5). After the adsorbent (5) adsorbs the target components in the exhaust gas, the nitrogen gas is introduced into the adsorbent (5), and then an electric discharge is generated so that the nonthermal plasma of the nitrogen gas is applied to the adsorbent (5) and causes desorption of the target components and regeneration of the adsorbent (5). This method can remove the target components effectively from oxygen-containing exhaust gas by using nitrogen gas plasma with high activity as a result of ionization of a nitrogen gas and combining adsorption, desorption by the nitrogen gas plasma, and nitrogen plasma treatment.

Abstract: A layered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. In one or more embodiments, the catalyst comprises three layers in conjunction with a carrier: a first layer deposited on the carrier and comprising palladium deposited on a refractory metal oxide and an oxygen storage component; a second layer deposited on the first layer and comprising rhodium deposited on a refractory metal oxide and an oxygen storage component; and a third layer deposited on the second layer and comprising palladium deposited on a refractory metal oxide.

Abstract: Engine exhaust is treated with a molecular sieve having the CHA crystal structure and having a mole ratio of greater than 50 of (1) an oxide selected from silicon oxide, germanium oxide or mixtures thereof to (2) an oxide selected from aluminum oxide, iron oxide, titanium oxide, gallium oxide or mixtures thereof.

Abstract: Apparatus is described for treating an effluent fluid stream from a semiconductor manufacturing process tool. The apparatus comprises a combustion chamber, means for heating the combustion chamber, and a nozzle for injecting the effluent stream into the combustion chamber. The apparatus is configured to enable a fuel and an oxidant to be selectively injected into the effluent stream as required to optimise the combustion conditions for a particular effluent stream. In one to embodiment, a lance projecting into the nozzle selectively injects an oxidant into the effluent stream, and a sleeve surrounding the nozzle selectively injects a fuel into the effluent stream.

Abstract: Catalyst systems and methods provide benefits in reducing the content of nitrogen oxides in a gaseous stream containing nitric oxide (NO), hydrocarbons, carbon monoxide (CO), and oxygen (O2). The catalyst system comprises an oxidation catalyst comprising a first metal supported on a first inorganic oxide for catalyzing the oxidation of NO to nitrogen dioxide (NO2), and a reduction catalyst comprising a second metal supported on a second inorganic oxide for catalyzing the reduction of NO2 to nitrogen (N2).

Abstract: The present invention is directed to an improved apparatus and method of minimizing catalyst poisoning by inorganic deposits from lube oil additives and particulate matter, especially in aircraft. More specifically, the present invention is directed to an air purification system comprising an upstream metallic foam trap and downstream converter, wherein the trap physically blocks inorganic deposits and particulate matter from poisoning the downstream catalysts. The present invention is also directed to a metallic foam trap containing a coat comprising a first metallic thermal arc sprayed layer and optionally a second refractory metal oxide.

Abstract: The invention relates to a method for the catalytic reduction of NOx in an NOx containing gas using methane in the presence of a catalyst which comprises a palladium-containing zeolite. In this process one uses a zeolite based on rings of 12 oxygen atoms, wherein the zeolite also comprises scandium, yttrium, a lanthanide or a combination thereof. The invention also relates to the catalyst itself and the preparation thereof.

Abstract: A method treats a flow gas that is guided via a catalytic adsorber module to oxidize contaminants carried in the flow gas. The method reliably purifies the flow gas using equipment that is held to a comparatively low level of complexity. To this end, the flow gas is guided in a first purification step via a first catalytic adsorber module to oxidize contaminants carried along therewith, during which molecular or atomic oxygen is added to the flow gas, and the flow gas mixed with the added oxygen is guided in a second purification step via an oxidation catalyst. The flow gas flowing away from the oxidation catalyst is guided in a third purification step via a second catalytic adsorber module to reduce excessive oxygen.

Abstract: A hydrocarbon trap comprises an Ag-zeolite which is heated by a unique steaming regimen.

Abstract: A fired equipment system and process for operating same is provided that combines stationary industrial burner technology and a catalyst bed that converts pollutants formed during combustion of fuel and air in the burner to yield stack gases that need no further treatment before discharge to the atmosphere. The system and process disclosed reduces CO, NOx and VOC's by at least 90 to 95%.

Abstract: A three-way catalyst (TWC) composition comprises a manganese-containing oxygen storage component (OSC) and at least one optionally doped alumina wherein where the at least one alumina is gamma-alumina it is doped with at least one of a rare earth metal, silicon, germanium, phosphorus, arsenic, calcium, strontium or barium.

Abstract: An exhaust gas purifying catalyst has a catalytic component including copper, ZSM-5, and ? zeolite. This exhaust gas purifying catalyst reduces nitrogen oxides even from low temperature range and exhibits durability even under a thermal load of high temperature.

Abstract: An exhaust gas treatment apparatus (20) for reducing the concentration of NOx, HC and CO in an exhaust gas stream (18) such as produced by a gas turbine engine (12) of a power generating station (10). The treatment apparatus includes a multifunction catalytic element (26) having an upstream reducing-only portion (28) and a downstream reducing-plus-oxidizing portion (30) that is located downstream of an ammonia injection apparatus (24). The selective catalytic reduction (SCR) of NOx is promoted in the upstream portion of the catalytic element by the injection of ammonia in excess of the stoichiometric concentration, with the resulting ammonia slip being oxidized in the downstream portion of the catalytic element. Any additional NOx generated by the oxidation of the ammonia is further reduced in the downstream portion before being passed to the atmosphere (22).

Abstract: The present invention discloses a method for reducing NOx in exhaust gases of an internal combustion engine. The purpose of this invention is to convert engine out NOx (approximately 90% NO in diesel exhaust) into roughly a 50:50 mixture of NO and NO2, while simultaneously oxidizing engine-out hydrocarbons which interfere with the reduction of NOx by urea or ammonia. The present invention demonstrates that a 50:50 blend of NO and NO2 is reduced more rapidly and with higher efficiency than a gas stream which is predominantly NO. In addition, catalyst in an engine exhaust that is a 50:50 mixture of NO and NO2 is far more resistant to hydrothermal deterioration than using NO alone. In another embodiment of the present invention, a vehicle exhaust system utilizing the method of the present invention is provided.

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: A substrate processing apparatus comprises a process chamber and an effluent treatment apparatus comprising a hydrogenation reactor, scrubber, combustor, and a controller to operate the process chamber and effluent treatment apparatus. In the hydrogenation reactor, hydrogen-containing gas is used to treat chamber effluent to form a hydrogenated effluent comprising hydrogen chloride gas. A scrubber sprays water through the hydrogenated effluent to dissolve the hydrogen chloride gas. An oxygen-containing gas is added to the treated effluent during a combustion step to further abate the effluent.

Abstract: This invention provides a catalyst for removing hydrocarbons from a combustion gas containing methane and containing an excess of oxygen, which comprises iridium supported on zirconium oxide; and a method of removing hydrocarbons from a combustion gas containing methane and containing an excess of oxygen, which comprises using this catalyst.

Abstract: Process for the removal of oxygen from a gas mixture comprising oxygen, at least one olefin, hydrogen, carbon monoxide and optionally at least one alkyne, the ratio of oxygen:hydrogen in the gas mixture being 1 part by volume of oxygen to at least 5 parts by volume of hydrogen. The process comprises contacting the gas mixture with a catalyst in a reaction zone under conditions sufficient to oxidise at least a portion of the hydrogen and to oxidize at least a portion of the carbon monoxide and without significant hydrogenation of the at least one olefin. The catalyst comprises at least one metal or oxide of a metal from the 10th group of the Periodic Table of Elements, the metal or oxide of the metal being supported on an oxide support, provided that the catalyst also comprises tin.

Abstract: A method of conducting the partial oxidation to sulphur in at least one furnace of part of the hydrogen sulphide content of a feed gas mixture containing from 10 to 60% by volume of hydrogen sulphide but including at least one aromatic hydrocarbon impurity typically selected from benzene, xylene, toluene and ethyl benzene. A flame is created in the furnace. All the feed gas mixture is fed to the flame. Oxygen molecules are also fed to the flame. At last some of the oxygen molecules are supplied from a source of oxygen-enriched air to pure oxygen, and there is created in the flame at least one hot aromatic hydrocarbon impurity destruction region in which a substantial proportion, typically at least 75% by volume, of the aromatic hydrocarbon impurity is destroyed.

Abstract: A gas stream containing at least one fluorine compound selected from the group consisting of compounds of carbon and fluorine, compounds of carbon, hydrogen and fluorine, compounds of sulfur and fluorine, compounds of nitrogen and fluorine and compounds of carbon, hydrogen, oxygen and fluorine is contacted with a catalyst comprising at least one of alumina, titania, zirconia and silica, preferably a catalyst comprising alumina and at least one of nickel oxide, zinc oxide and titania in the presence of steam, thereby hydrolyzing the fluorine compound at a relatively low temperature, e.g. 200°–800° C., to convert the fluorine of the fluorine compound to hydrogen fluoride.

Abstract: This invention relates generally to a ruthenium stabilized oxidation-reduction catalyst useful for oxidizing carbon monoxide, and volatile organic compounds, and reducing nitrogen oxide species in oxidizing environments, substantially without the formation of toxic and volatile ruthenium oxide species upon said oxidizing environment being at high temperatures.

Abstract: A cleaning process of exhaust gas which includes the steps of bringing the exhaust gas containing at least one of nitrogen oxides or organic solvent into contact with a cleaning agent including metal as a reductive cleaning agent component and metal oxide as an oxidative cleaning agent component or including lower valent metal oxide as a reductive cleaning agent component and higher valent metal oxide as an oxidative cleaning agent component while heating them. A cleaning process of exhaust gas containing nitrogen oxides and/or organic solvent with high and varying concentration discharged from a manufacturing process of semiconductor capable of easily cleaning at relatively low temperature and with high decomposition factor without using large-scale cleaning apparatus or a complicated structural cleaning apparatus is provided.

Abstract: Method for removing tar-forming hydrocarbons from an effluent gas mixtures from Chemical Vapor Deposition or Chemical Vapor Infiltration processes. Method includes passing at elevated temperature effluent gas mixture containing hydrogen, methane, and high molecular weight hydrocarbons through a bed that contains iron pellets, thereby decomposing tar-forming high molecular weight hydrocarbons in the effluent gas mixture. Apparatus including a de-tarring vessel (5) having a packed bed (7, 8, 9) of iron or iron oxide pellets (1) resting over a perforated distributor plate (2) and having an exhaust port (12), said de-tarring vessel being operatively linked via an exhaust port (6) to a CVI or CVD reactor vessel.

Abstract: A method for catalytically cleaning an exhaust gas, including receiving the exhaust gas in an inlet channel, blocking the exhaust gas in the inlet channel, diffusing the exhaust gas through a porous substantially fibrous nonwoven wall of the inlet channel, reacting the exhaust gas with at least one catalyst material to at least partially remove nitrous oxides, hydrocarbons and carbon monoxide therefrom, the at least one catalyst material being disposed on the porous wall, trapping particulate matter in the porous substantially fibrous nonwoven wall, receiving the diffused exhaust gas into an outlet channel, and transitioning the exhaust gas from the outlet channel to the atmosphere.

Abstract: A catalyst for the oxidation of volatile organic compounds and carbon monoxide comprising manganese and alumina, such catalyst having been impregnated with a phosphorus compound. The presence of the phosphorus compound results in a significant oxidative conversion of both the volatile organic compounds and the carbon monoxide. The catalyst is especially useful for treating gaseous streams that emanate from industrial sources, such as wood pulp manufacturing plants. The manganese portion of the catalyst is preferably comprised of manganese compounds comprising a defect non-stoichiometric manganese oxide of the type ?-Mn3O4+x, wherein x has the value of 0.1?x?0.25 in respect to about 80 to about 95% of all manganese atoms, and manganese aluminate in respect to the balance of the manganese atoms. The alumina portion of the catalyst is preferably comprised of high temperature forms of alumina of the type comprising ?-Al2O3 and (?+?+?)-Al2O3.

Abstract: Materials with a perovskite structure in form of solid solutions with general formula: AzZr1?xBxO3 Where A is Ba or a rare earth element, B is Pt, Ir, Rh or Ce z is 1 when A is Ba and is ? when A is a rare earth, x is in the range 0.01 and 0.8.

Abstract: An integrated multi-functional catalyst system includes a diesel particulate filter having an inlet side for receiving flow and an opposite outlet side, a substrate in the diesel particulate filter having an interior wall surface and an exterior wall surface, a first washcoat layer applied to the interior wall surface and adjacent the inlet side, and a second washcoat layer applied to the exterior wall surface and adjacent the outlet side, wherein flow distribution through the substrate is dispersed for minimizing back pressure. The diesel particulate filter may be one of a plurality of honeycomb cells.