Abstract: To provide an exhaust gas purifying method for purifying the exhaust gas of an internal combustion engine (1) by an exhaust gas purifying system (10) having an oxidation catalyst (3a), which comprises the steps of estimating the quantity of unburnt hydrocarbon accumulated in a support of the oxidation catalyst (3a), performing a hydrocarbon removal control when an estimated accumulation quantity (Vhc) of the unburnt hydrocarbon exceeds a predetermined judgment value (Vhc0) and raising an exhaust gas temperature (T) to activate the oxidation catalyst (3a) and oxidizing and removing the accumulated unburnt hydrocarbon. Thereby, it is possible to prevent a white fume from being produced after a low exhaust temperature state of an idling operation or the like continues for a long time.

Abstract: A wall-flow filter (10) for an exhaust system of a combustion engine comprises: a plurality of channels (4,6,8) in honeycomb arrangement, wherein at least some of the channels (6) are plugged (12) at an upstream end and at least some of the channels (4,8) not plugged at the upstream end are plugged (14) at a downstream end; an oxidation catalyst (16) on a substantially gas impermeable zone at an upstream end of the channels (4,8) plugged at the downstream end; and a gas permeable filter zone (22) downstream of the oxidation catalyst for trapping soot, characterised in that in an exhaust system, preferably a diesel exhaust system, the oxidation catalyst is capable of generating sufficient NO2 from NO to combust the trapped soot continuously at a temperature less than 400° C.

Abstract: A method for purification of an oxygen contaminated nitrous oxide gas by feeding the nitrous oxide gas and a reducing agent such as hydrogen, carbon monoxide or ammonia into a de-oxidation reactor, performing de-oxidation by reacting the reducing agent with oxygen using a catalyst such as palladium or platinum in order to deplete the oxygen in the nitrous oxide gas, while limiting the amount of nitrous oxide removed from the nitrous oxide gas.

Abstract: A continuous and regenerative process for removal and destruction of VOC from effluents is disclosed. The process employs two fixed bed reactors in series filled with adsorbent/catalyst. The VOC containing effluent is passed over the first reactor for adsorbing VOC, while the second reactor, which is loaded with VOC from the previous cycle is regenerated with part of the treated gas made up with an appropriate amount of air. Just before the VOC breakthrough occurs at the first reactor, the roles of the two reactors are switched. The process is characterized by simple design, high VOC removal efficiency, no external heat requirement and low operation cost.

Abstract: A process for removing an organic compound or compounds which is/are a chlorinated hydrocarbon or hydrocarbon by catalytic combustion, the process including the step of contacting the organic compound or compounds with a combustion catalyst which includes a mixture of a zeolite and a metal oxide, where the metal oxide is loaded with at least one of the elements of the platinum group.

Abstract: The present invention relates to a composite of cerium, zirconium and samarium components, a catalyst composition containing such composite and the use of the catalyst composition for the treatment of a gas stream to reduce contaminants contained therein. The catalyst composition has the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides.

Abstract: A process for purifying octafluoropropane according to the present invention includes the step of contacting a crude octafluoropropane containing impurities with an impurity decomposing agent under an elevated temperature and then with an adsorbent to substantially remove the impurities from the crude octafluoropropane. According to the purification process or preparation process of octafluoropropane of the present invention, impurities such as chlorine compounds can be substantially removed and a high-purity octafluoropropane can be easily obtained. The octafluoropropane obtained by the purification process of the present invention is substantially free of impurities and, therefore, can be used as an etching or cleaning gas for use in the production process of a semiconductor device and the like.

Abstract: The invention refers to a method for removing traces of hydrocarbons, particularly propane, from gas flows. The conversion of hydrocarbons into carbon oxides is achieved by loading suitable carrier materials, such as e.g. TiO2 or Al2O3, with ruthenium as active component, possibly doping them with one or more further element(s), and subsequently calcining and/or reducing them at an increased temperature. By means of these catalysts, and at 20 to 150° C. and while adding molecular oxygen, hydrocarbons, particularly propane, in concentrations ranging from 0.1 to 2,000 ppm are oxidized.

Abstract: A method and system for eliminating, in whole or in part, contaminants in a gas stream or gaseous body such as air or an exhaust gas or gas emission stream is provided. The method includes the steps of contacting the gas stream or gaseous body with a biocide containing liquid so as to eliminate, in whole or in part, the contaminant(s). The biocide containing liquid is typically an aqueous solution, suspension, or emulsion comprising hydrogen peroxide (H2O2) in combination with a catalyst for enhancing the activity thereof, the catalyst preferably comprising a superoxidedismutase formed from the combination of elemental copper (Cu), silver (Ag), manganese (Mn) and zinc (Zn). The method and system find particular application in the combating of sick building syndrome (SBI) and building related illness (BRI).

Abstract: The present invention relates to a method for purifying process waste gases by introducing them into a waste gas purification system that includes a reaction chamber and by post-treating the reaction products that leave the reaction chamber in a washing or sorbtion chamber with an associated washing agent circuit. The type and amount of harmful substances in the process waste gas are continuously measured before the waste gases enter the waste gas purification system. In addition, the type and amount of harmful substances in the reaction products that leave the waste gas purification system are simultaneously determined directly at the exit of the system and the measuring signals are used to regulate the operating parameters of the waste gas purification system.

Abstract: A method for oxidizing carbon adsorbable organic compounds in a controlled manner within a bed of activated carbon. The bed of activated carbon is exposed to a source of molecular oxygen, such as air, and is controlled within a temperature range whereby the molecular oxygen is slowly oxidizing the activated carbon. Under this controlled set of conditions, the activated carbon will oxidize organic compounds present within the bed of activated carbon. This technique has widespread versatility for the controlled destruction of organic vapors and liquids by activated carbon and applications for the regeneration of spent activated carbons containing previously adsorbed organic compounds.

Abstract: Systems and apparatus for increasing combustion efficiency during combustion of a carbon-containing fuel such as a fossil fuel. The systems and apparatus utilize catalytically reactive particles within a reaction chamber, typically silica or alumina, that interact with waste exhaust gases produced during combustion of the fuel in order to produce a degrading atmosphere of hydroxy radicals or other reactive species. The degrading atmosphere apparently migrates to the source of combustion and increases the efficiency of combustion as evidenced by the reduction or elimination of soot and other pollutants normally produced. Typically, the reaction chamber is maintained at a temperature in a range from about 30° C. to about 600° C. Moisture is provided by the waste exhaust gases in order to catalyze formation of hydroxyl radicals by the catalytically reactive particles.

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: A process for the decomposition and removal of one or more fluorine containing compounds from a first gaseous mixture comprising the one or more fluorine containing compounds and water vapour, which process comprises the stages of: (i) contacting the first gaseous mixture with a catalyst comprising an aluminium based material to produce a second gaseous mixture comprising hydrogen fluoride and carbon oxides; and (ii) removing the hydrogen fluoride from the second gaseous mixture to produce a third gaseous mixture, which is substantially free of hydrogen fluoride.

Abstract: Soot formation is suppressed in the preparation of hydrogen and/or carbon monoxide rich gas by arranging on at least a surface of an upper portion of a reactor a catalytic material which is active in steam reforming hydrocarbons, introducing a hydrocarbon feedstock and an oxygen-containing atmosphere into the upper portion of the reactor, partially oxidising the feedstock with oxygen in the upper portion of the reactor, and contacting a part of the partially oxidized feedstock with the reforming catalyst in the reactor upper portion.

Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.

Abstract: A process for treating a hydrocarbonaceous material comprising contacting such material with catalysts made from a newly discovered phase of aluminum trihydroxide.

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: A process for treating gaseous emissions generated during the production of carbon anodes in the aluminum industry. In this process, first gaseous emissions generated during green anode preparation are collected and preheated by direct contact with a stream of combustion gases. Second gaseous emissions generated during anode baking are also collected and mixed with the first gaseous emissions to form a gaseous emission mixture. Alumina powder is then injected into the so obtained mixture and the resulting mixture with the alumina injected therein is processed into a dry scrubber that is equipped with a bag filter and is operating at temperatures well above the saturation temperature of tars, so as to obtain a gaseous mixture partially purified and free of fluorides and particulates. The so obtained partially purified gaseous mixture is then processed into an oxidation furnace in order to destroy all the organic compounds contained therein.

Abstract: In a process for the recovery of krypton and xenon, an oxygen-enriched stream containing krypton and/or xenon and hydrocarbons is removed from an air separation unit. A substantial portion of the hydrocarbons, especially methane, ethane, and acetylene, is removed from the oxygen-enriched stream prior to the distillation process. The hydrocarbon removal process includes, but is not restricted to, the hydrocarbons reacting with a portion of the oxygen present in the feed gas. The krypton and xenon are eventually recovered from the oxygen stream through a distillation process. The distillation process is performed in such a manner that at least a stream further enriched in both krypton and xenon is produced.

Abstract: A method for treating waste gas containing PFC and/or HFC, comprising contacting a mixture of gas waste containing PFC and/or HFC, ozone, and water with an iron oxide catalyst at a temperature between 50 and 300° C. by gas-solid contact to perform an oxidation reaction for reducing the amount of PFC and/or HFC. An apparatus for treating waste gas containing PFC or HFC is also provided. The operational temperature in the present invention is much lower than the prior art, and thus provides lower energy consumption and little risk of fire. The present invention is suitable for the treatment of waste gas containing PFC and/or HFC, especially for the removal of perfluorocompounds from the waste gas generated by semiconductor and photoelectrical product manufacturing plants.

Abstract: Systems and methods for recovering and purifying water from a gas stream, comprising a gas stream purification unit for purifying the gas stream, a water separation unit for separating water from the purified gas stream, and a water purification unit for purifying the water separated by the water separation unit. The gas stream purification unit may comprise at least one of a soot reactor and a catalytic oxidation reactor, the water separation unit may comprise at least one of a condenser and a water extractor, and the water purification unit may comprise a cyclic reverse osmosis system.

Abstract: Oxidation catalysts for used in the full oxidation to CO2 and H2O of volatile organic compounds, such as hydrocarbons, comprising mixed oxides of copper, manganese and one or more rare-earth metals, wherein the metals can assume multiple valency states, having a percentage composition by weight, expressed as CuO, MnO and rare-earth oxides, in which the metal has the minimum value of 8-50%, 10-75% and 2-15%, respectively. The oxides are supported on inert porous inorganic oxides.

Abstract: A process for the oxidative purification of an exhaust gas containing oxygen and a combustible component by oxidative reaction in an oxidation reactor, in which the exhaust gas, before being introduced into the oxidation reactor, passes through a high-velocity path in which the flow velocity of the gas passing through is higher than the flashback velocity, and in which a substream of the flue gas liberated in the oxidative reaction is recirculated to the high-velocity path.

Abstract: A combustion catalyst for removing organic compounds from a gas stream containing the same and a process for removing organic compounds from the gas stream using the catalyst are disclosed. The combustion catalyst comprises a first catalyst comprising a metal oxide containing at least one of the elements of the platinum group, and a second catalyst comprising a mixture of zeolite with a metal oxide containing at least one of the elements of the platinum group, in a manner such that the organic compounds are contacted first with the first catalyst and then with the second catalyst, whereby the organic compounds can be efficiently removed at a low temperature.

Abstract: The invention relates to a method for the purification of gasification gas obtained from a carbonaceous material. The purification is carried out by adding oxygen or an oxygen-containing gas to the gasification gas and by contacting the gas mixture with a solid catalyst. According to the invention the catalyst contains at least one zirconium compound, such as zirconium oxide, which is used in particulate form as such or, for example, combined with an inert, honeycomb-structured support. By the purification, ammonia and organic tarry impurities can be removed from the gas simultaneously.

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 composition and method for oxidizing fuels is disclosed. The catalyst composition comprises at least one compound having one of a group III, group IIA or Lanthanide element such as, for example, Aluminum, Magnesium or Cesium, and at least one compound having at least one element selected from group IA, group IVA, group VI, group VII, group VIII, group IB, group IIB, and combinations thereof, such as, for example platinum, rhodium and rhenium. A method for oxidizing an fuel, the method comprising providing a fuel and a catalyst mixture; transporting the fuel and the catalyst to the flame zone separately; mixing the fuel and the catalyst; and oxidizing the fuel. The method and catalyst mixture may be used for oxidation of any hydrocarbon based fuel. Improved results from the use of the group III, group IIA or Lanthanide group element include increased power, reduced harmful emissions, and smoother oxidation process.

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: A process for the purification of an inert gas recycled from a polymerization reactor is disclosed, comprising the steps of mixing the gas with oxygen or gas containing oxygen in stoichiometric quantity or in such an excess that the gas at the outlet of the catalyst bed contains no more than 250 ppm of oxygen, circulating the gas through a catalyst bed comprising platinum, which has been subjected to a reducing environment, at temperatures of no more than 300° C. (572° F.) and preferably no more than 250° C. (482° F.) and recycling the gas to the polymerization reactor.

Abstract: A process for treating gaseous emissions generated during the production of carbon anodes in the aluminum industry. In this process, first gaseous emissions generated during green anode preparation are collected and preheated by direct contact with a stream of combustion gases. Second gaseous emissions generated during anode baking are also collected and mixed with the first gaseous emissions to form a gaseous emission mixture. Alumina powder is then injected into the so obtained mixture and the resulting mixture with the alumina injected therein is processed into a dry scrubber that is equipped with a bag filter and is operating at temperatures well above the saturation temperature of tars, so as to obtain a gaseous mixture partially purified and free of fluorides and particulates. The so obtained partially purified gaseous mixture is then processed into an oxidation furnace in order to destroy all the organic compounds contained therein.

Abstract: An exhaust gas purifying method for a fuel cell vehicle comprises preparing an exhaust gas purifying system for the fuel cell vehicle, the exhaust gas purifying system including a methane removal catalyst for accelerating the conversion of methane into hydrogen and carbon monoxide. The methane removal catalyst comprises a catalytic ingredient including at least one of rhodium, platinum and palladium.

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: A combustion type waste gas treatment method wherein waste gas discharged from an industrial product manufacturing process is introduced into combustion flames to thermally or oxidatively decompose a combustible component in the waste gas. Hydrogen gas and oxygen gas are generated by electrolysis of water and supplied as a gas for combustion to form the combustion flames. A pipe or a hole through which the combustion flames can be viewed directly is formed in a wall of the burner part upstream of the combustion flames. The combustion flames are detected with a UV sensor through the pipe or the hole.

Abstract: Gas-phase methods and systems for reducing NOx emissions and other contaminants in exhaust gases, and industrial processes using the same, are disclosed. In accordance with the present invention, hydrocarbon(s) autoignite and autothermally heat an exhaust gas from an industrial process so that NH3, HNCO or a combination thereof are effective for selectively reducing NOx autocatalytically. Preferably, the reduction of NOx is initiated/driven by the autoignition of hydrocarbon(s) in the exhaust gas. Within the temperature range of about 900-1600° F., the introduced hydrocarbon(s) autoignite spontaneously under fuel-lean conditions of about 2-18% O2 in the exhaust gas. Once ignited, the reactions proceed autocatalytically, heating the exhaust gas autothermally. Under some conditions, a blue chemiluminescence may be visible.

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: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.

Abstract: A process for treating a waste gas containing condensable organic compounds in the form of an aerosol of liquid particles, in a regenerative thermal oxidation system comprising a combustion chamber and at least two regenerators. During a first period of time, the waste gas is directed through a first one of the regenerators wherein the waste gas is heated by contact with a packing material contained therein, then through the combustion chamber wherein oxidation of the organic compounds contained in the waste gas is achieved and finally through a second regenerator wherein the oxidized gas coming from the combustion chamber is cooled by contact with a packing material contained in the second regenerator, such a contact causing simultaneous heating of the packing material contained in the second regenerator. The oxidized gas which leaves the second regenerator is then purified and may be discharged to the atmosphere.

Abstract: The present invention relates to a process for treating a dioxin-containing exhaust gas which can inhibit the generation of dioxin occurring either in the course of cooling of the exhaust gas between a downstream portion subsequent to a combustion chamber and a dust collector or due to a memory effect upon low-temperature combustion in flues or dust collector at the start-up or shut-down of intermittent operation-type solid waste incinerators, without large-scale incineration facilities or plant renovation and equipment investment, and a composite catalyst composition for inhibiting the generation of dioxin, comprising an iron compound, an acid gas neutralizing agent and optionally an activated carbon.

Abstract: A catalytic oxidation system and method for the treatment of volatile organic compounds in which VOC-containing gas is preheated in a heat exchanger for raising its temperature before oxidation in a catalytic oxidizer without use of a burner. A reduced portion of the VOC-containing gas is diverted into an internal combustion engine with the exhaust mixed with the preheated VOC-containing gas to further raise the temperature of the mixed gas to a required reaction temperature for oxidation of the VOC-containing gas in the catalyst bed of the catalytic oxidizer. Heat from the catalytic reaction is recovered to assist preheating the VOC-containing gas in the heat exchanger.

Abstract: In a process for the recovery of krypton and xenon, an oxygen-enriched stream containing krypton and/or xenon and hydrocarbons is removed from an air separation unit. A substantial portion of the hydrocarbons, especially methane, ethane, and acetylene, is removed from the oxygen-enriched stream prior to the distillation process. The hydrocarbon removal process includes, but is not restricted to, the hydrocarbons reacting with a portion of the oxygen present in the feed gas. The krypton and xenon are eventually recovered from the oxygen stream through a distillation process. The distillation process is performed in such a manner that at least a stream further enriched in both krypton and xenon is produced.

Abstract: A method for oxidizing carbon adsorbable organic compounds in a controlled manner within a bed of activated carbon. The bed of activated carbon is exposed to a source of molecular oxygen, such as air, and is controlled within a temperature range whereby the molecular oxygen is slowly oxidizing the activated carbon. Under this controlled set of conditions, the activated carbon will oxidize organic compounds present within the bed of activated carbon. This technique has widespread versatility for the controlled destruction of organic vapors and liquids by activated carbon and applications for the regeneration of spent activated carbons containing previously adsorbed organic compounds.

Abstract: A process for treating a waste gas containing condensable organic compounds in the form of an aerosol of liquid particles, in a regenerative thermal oxidation system comprising a combustion chamber and at least two regenerators. During a first period of time, the waste gas is directed through a first one of the regenerators wherein the waste gas is heated by contact with a packing material contained therein, then through the combustion chamber wherein oxidation of the organic compounds contained in the waste gas is achieved and finally through a second regenerator wherein the oxidized gas coming from the combustion chamber is cooled by contact with a packing material contained in the second regenerator, such a contact causing simultaneous heating of the packing material contained in the second regenerator. The oxidized gas which leaves the second regenerator is then purified and may be discharged to the atmosphere.

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: 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: The invention refers to a method for removing traces of hydrocarbons, particularly propane, from gas flows. The conversion of hydrocarbons into carbon oxides is achieved by loading suitable carrier materials, such as e.g. TiO2 or Al2O3, with ruthenium as active component, possibly doping them with one or more further element(s), and subsequently calcining and/or reducing them at an increased temperature. By means of these catalysts, and at 20 to 150° C. and while adding molecular oxygen, hydrocarbons, particularly propane, in concentrations ranging from 0.1 to 2,000 ppm are oxidized.

Abstract: A method for producing carbon fiber including the following processes: a process for obtaining fine carbon fiber by thermally decomposing an organic compound in a furnace by use of a catalyst; a process for separating a reaction exhaust gas contained in the carbon fiber; a process for continuously subjecting the carbon fiber to thermal treatment in a non-oxidative atmosphere; and a process for incinerating a thermal treatment exhaust gas generated in the thermal treatment and/or the reaction exhaust gas. The method for separating a reaction exhaust gas from carbon fiber is characterized in that a packed carbon fiber layer is formed, an inert gas is caused to flow through the layer, and the layer is compressed. Combustion of the reaction exhaust gas and combustion of the exhaust gas generated from the subsequent thermal treatment is achieved through employment of a pilot burner holding flame at all times in a vertical incinerator.

Abstract: A catalyst for removing hydrocarbons from exhaust gas containing methane and an excess of oxygen, which comprises palladium or palladium/platinum supported on at least one carrier selected from zirconia, sulfated zirconia and tungsten-zirconia, and a method for treating exhaust gas using the catalyst.

Abstract: The invention teaches a purification system which uses a series of operations, in a single unit, to purify air, while extending the life of the purification units. Air is passed through a coarse water trap to remove liquid. The semi-dry air, which is usually less than 3000 ppm of water vapor, is then passed through adsorbers, which remove the remaining moisture and all the carbon dioxide in a purification process. The drying of the air before passing it through the adsorbers allows for greatly improved efficiency of air purification and extends the life of both the oxygen catalyst and the adsorption columns. The present invention also flows the air to be purified through adsorption columns twice, before and after passing the air through an oxygen catalyst unit.