Abstract: A process for removal of ethylene oxide (EO) from ambient air laden with EO is passed through a zeolite-based removal media, which preferrably consists of the acid form of zeolite ZSM-5, herein referred to as “H-ZSM-5.” The process described herein may be applied to many forms, configurations and uses, such as, for example, gas masks, fume hood ventilation filters, cartridge filters, etc. Preferably, the H-ZSM-5 is configured within an apparatus in such a manner that the stream containing EO is brought into sufficient contact with the zeolite to remove the EO from the airstream.

Abstract: A plasma reactor including a first dielectric having at least one capillary defined therethrough, and a segmented electrode including a plurality of electrode segments, each electrode segment is disposed proximate an associated capillary. Each electrode segment may be formed in different shapes, for example, a pin, stud, washer, ring, or disk. The electrode segment may be hollow, solid, or made from a porous material. The reactor may include a second electrode and dielectric with the first and second dielectrics separated by a predetermined distance to form a channel therebetween into which the plasma exiting from the capillaries in the first dielectric is discharged. The fluid to be treated is passed through the channel and exposed to the plasma discharge. If the electrode segment is hollow or made of a porous material, then the fluid to be treated may be fed into the capillaries in the first dielectric and exposed therein to the maximum plasma density.

Abstract: A method of reducing at least one atmospheric oxidising pollutant, such as ozone, with a reducing agent comprises contacting the reducing agent with the at least one atmospheric oxidising pollutant, wherein the reducing agent comprises a precious metalfree trap material, such as a zeolite, including at least one trapped atmospheric reducing pollutant, e.g. a hydrocarbon, whereby as the at least one atmospheric oxidising pollutant is reduced the at least one trapped atmospheric reducing pollutant is oxidised.

Abstract: The invention relates to a process for remediation of a fluid contaminated with alkylene oxide, involving contacting the contaminated fluid with an aqueous absorbent to yield a fat absorbent having absorbed fluid, conferring intimate contact of fat absorbent and alkylene oxide and conversion of alkylene oxide; and, an apparatus for remediation of the fluid which has a converter having inlet means connected to the outlet of a fluid absorber for contacting fluid and aqueous absorbent, a holding unit having a volume V for the fat absorbent, and outlet means connected to the inlet of a fluid desorber.

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: A reagent composition for removing a contaminant from a gas. The reagent composition contains (1) a silicate compound; (2) a sequestrant; and optionally a surfactant. The reagent composition may be used in methods to remove contaminants from gases. The reagent composition in combination with micro/miniature mechanical structures provides for reduced back pressure and reduced volume of the reaction chamber.

Abstract: Methods and apparatus are described which utilize an aqueous hydrogen peroxide composition of hydrogen peroxide and at least one additive which serves to catalyze the rapid decomposition of the hydrogen peroxide into hydroxyl radicals. When contacted with an atmospheric effluent containing odor and/or noxious components, the hydroxyl radicals formed oxidize the odor and noxious components to non-odor offensive, environmentally acceptable by-product.

Abstract: The invention relates to a material for treating gaseous media containing volatile organic components. According to the invention, the material is porous and exhibits an absorption capacity of approximately 20-30% in relation to the dry weight thereof, containing approximately 47-52% by weight of a composite carbon and silicon structure, approximately 12-20 wt. % carbon, approximately 5-7 wt % hydroxyl, and approximately 1-2 wt % oxygen. The invention can be used in atmospheric treatment for the preservation of living matter.

Abstract: A cryogenic cleaner for and a method of performing cleaning of a surface that must be substantially free of contaminants utilizing a multi-stage, multi-mode filtered carbon dioxide-containing cleaning medium. Multiple stages and multiple types of filtration/purification are provided to remove contaminants such as hydrocarbons from the medium. In accordance with preferred embodiments, a filtering/purification process is provided that desirably utilizes one or more of: condensation of the hydrocarbon; particulate filtration; chemical filtration using activated filters; and catalytic oxidation. In certain embodiments, a resiliently mounted nozzle is provided for spraying a cryogenic cleaning medium on the surface. The nozzle may be driven in an oscillatory manner at a predetermined amplitude and frequency so the nozzle spray is delivered in a manner to provide pulsing of the spray and to provide as “snow plow” effect on contaminants as the spray delivers the cleaning medium against the surface.

Abstract: High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling stage but above the freezing point of the highest melting compound in the first cooling stage, further cooling the gas in a second cooling stage to at least −20° C., returning cooled gas from the second cooling stage to the first cooling stage, and recovering condensate streams which contain the contaminant compound from the first and second cooling stages. An apparatus suitable for carrying out this process is also disclosed. The process of the present invention is particularly useful for removing chloro-aromatic compounds from anhydrous hydrogen chloride gas.

Abstract: In an air conditioning system which includes a catalytic air purifier, a control system is provided for sensing the level of predetermined conditions in a space and for responsively modulating the air purification process in a manner which optimizes the process in terms of its effectiveness and its economical use. The conditions that are sensed include the levels of VOC's, CO2, and biological contaminants, as well as degree of occupancy, relative humidity and air flow. The air purification process is modulated by varying the power to a UV lamp, turning one or more UV lamps on or off, varying the effectiveness of the catalyst, varying the volume or speed of the air flowstream and/or varying the relative humidity in the space.

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: An apparatus and method for reducing hazardous gases exhausted from a process chamber 25 includes an effluent plasma reactor 210 and a downstream catalytic reactor 220. The reactor 210 may include a consumable liner that reacts with the energized effluent to remove the hazardous gases. The catalytic reactor 220 may also include catalytic surfaces 227 in a honeycomb, foam, or pellet structure 225 to catalyze reactions that further reduce hazardous gas content.

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: There is a control system for a catalytic process. The control system has the following: a) an electroconductive support having a layer of a catalyst thereon; b) a means for applying DC current of one polarity to the catalyst layer and the opposite polarity to the electroconductive support; c) a means for controlling and varying the application of DC current; d) a means for measuring the polarization impedance across the catalyst layer and the electroconductive support; e) a means for comparing the measured polarization impedance with a reference value; and f) a means for varying the application of DC current to the catalyst layer and the electroconductive support when the measured polarization impedance differs from the reference value.

Abstract: A process for reducing perfluorinated compounds and/or hydrofluorocarbon compounds in a sample uses a catalyst made from aluminum oxide (Al2O3), and one or more enhancers selected from the group consisting of nickel, cobalt, and sulfate. Another useful catalyst comprises zirconium oxide (ZrO2) and/or aluminum oxide (Al2O3) and nickel as an enhancer.

Abstract: Disclosed are a carbon dioxide purification process and apparatus including (i) an adsorbing step for removing a predetermined amount of hydrocarbons from a carbon dioxide feed gas to reduce the caloric value of the feed stream, and (ii) a catalytic oxidation step located downstream of the adsorbing step for removing residual hydrocarbons from the feed gas by catalytic oxidation.

Abstract: A process for oxidizing environmentally harmful compounds which participate in atmospheric photochemical reactions to produce for example ozone and undesirable smog constituents from a fluid, in particular a gas, volatile organic compounds (VOC) including hydrocarbons, CO and any other constituent that participates in atmospheric photochemical reactions to produce for example ozone or smog constituents and combustible compounds to be removed from a gas stream for reasons of toxicity, photochemical reactivity or physical discomfort such as irritants, particulates, odor sources and so on, and compounds which may cause upper atmosphere ozone depletion or lower atmosphere ozone formation. The uncoated randomly oriented mesh-like structure preferably has a porosity greater than about 85%. The coated randomly oriented mesh-like structure preferably has a porosity greater than about 65%.

Abstract: An apparatus for processing an organohalogen compounds includes a catalyst container containing a catalyst layer, a supplying path for supplying a carrier gas containing organohalogen compounds and steam through the catalyst container, a cooling chamber arranged at a lower portion of the catalyst container, a spraying apparatus mounted in the cooling chamber for spraying a cooling liquid to cool exhaust gas containing a decomposed gas of the organohalogen compounds exhausted from the catalyst layer and a baffle member forming a bent path which introduces the exhaust gas containing the decomposed gas into the cooling chamber from the catalyst layer and mounted in the cooling chamber for preventing mists generated by spraying cooling liquid from the spraying apparatus from back flowing into the catalyst container.

Abstract: A process is described for the elimination of hydrogen sulfide from gas mixtures by catalytic oxidation over activated carbon catalyst which converts the hydrogen sulfide to elemental sulfur and water, the former being sorbed by the activated carbon while the latter is transported with the gas mixture and may be removed by known dehydration processes. The above oxidative process is conducted at elevated temperatures and pressures and with sufficient residence time to assure virtually complete conversion of the hydrogen sulfide with minimal production of by-product sulfur dioxide. Traces of heavy hydrocarbons in the feed gas mixture which may reduce the life of the catalyst and the quality of the sulfur product may be removed by cryogenic means or by sorption on an activated carbon guard bed.

Abstract: A gas contaminant is filtered using fibers having internal cavities containing a chemically reactive oxidizing agent, an acid or base, a coordinating agent, a complexing agent, or a deliquescing agent. Where the contaminant is basic, the reagent is preferably an oxidizing agent. Where the contaminant is acidic, the reagent is preferably basic, and more preferably comprises a group 1 or group 2 metal cation. The reagent may also advantageously comprise a phosphate, chitosan, hypochlorite, borate, carbonate, hydroxide, or oxide. Where the contaminant is neutral, the reagent is preferably an oxidizing agent, complexing agent, coordinating agent, or deliquescing agent. The reagent is preferably impregnated into an adsorptive solid, including, for example, carbon powder, zeolite, aluminum oxide, or silica. The fibers are preferably multilobal, and most preferably either trilobal or quadrilobal. It is also preferred that the fibers contain a plurality of T shaped lobes.

Abstract: An adsorbent and process for producing an absorbent capable of decomposing an organic halogen compound, is provided. The adsorbent can adsorb organic halogen compounds contained in waste gases and can assuredly decompose them without synthesizing them. A salt of Pt and/or Pd, an organic titanium compound and an organic binder are reacted in a solvent, to thereby synthesize a dispersion of an organic metal compound precursor containing Pt and/or Pd and Ti in molecules thereof, a sol of TiO2 is added to the dispersion to prepare a catalyst-coating solution, an activated carbon is impregnated with the catalyst-coating solution, and the resulting mixture is heated, thereby allowing the activated carbon to carry thereon an organic halogen compound-decomposing catalyst comprising TiO2 and, dispersed therein, fine particles of Pt and/or Pd. In a low temperature range of 130 to 150° C.

Abstract: An adsorbent for a hydrocarbon, comprising a calcined &bgr;-type zeolite showing a powder X-ray diffraction such that the sum of X-ray diffraction intensities at lattice spacings d=1.15±0.03 nm and d=0.397±0.01 nm, is at least 90% of the diffraction intensity at d=0.346±0.01 nm of Catalysis Society reference catalyst JRC-Z-HM-20(3).

Abstract: There are disclosed a process for cleaning a harmful gas which comprises bringing the harmful gas containing as a harmful component, an organosilicon compound represented by the general formula: CH2CH—SiR3, CH2CH—Si(OR)3, CH2CHCH2—SiR3 or CH2CHCH2—Si(OR)3, wherein R indicates a saturated hydrocarbon group or an aromatic compound group, into contact with a cleaning agent comprising activated carbon adhesively incorporated with at least one species selected from the group consisting of bromine, iodine, a metal bromide and a metal iodide in which the metal is exemplified by copper, lithium, sodium, potassium, magnesium, calcium, strontium, manganese, iron, cobalt, nickel, zinc, aluminum and tin; and a cleaning agent comprising the same. The cleaning process and the cleaning agent enable to practically clean a harmful gas which is exhausted from a semiconductor manufacturing process and the like by the use of a dry cleaning process.

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: An ultra-efficient multilobal cross-sectioned fiber filter for chemical contaminant filtering applications is described. An absorptive chemically reactive reagent, preferably an acid or base and in liquid or an adsorptive chemically reactive reagent (an acid or base) in solid form, is disposed within longitudinal slots in each length of fiber. The reagent may be used alone or in conjunction with solid adsorptive particles which may also be utilized with the reagents in the longitudinal slots within the fibers. Reagents within the fibers remain exposed to a base-contaminated airstream passing through the filter. Base contaminants in the airstream, chemicals such as ammonium and amines (as well as particles), react with the acid reagent within the longitudinal slots of the fibers. As the contaminant and reagent react, the ammonium or amine becomes irreversibly absorbed (or adsorbed if reagent is a solid acid) to the liquid acid reagent and multilobal fiber.

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: Methods of increasing the relative concentration of a target molecule in a gas stream, so that it can be more easily detected by a semiconducting metal oxide based sensor. A gas stream is passed through an adsorbent, the stream containing molecules of the target molecule in a mixture containing molecules of at least one non-target molecule. Both the target and non-target molecules are adsorbed on the adsorbent. Another gas stream containing molecules of a chemical displacer is passed through the adsorbent, the molecules of the chemical displacer adsorbing on the adsorbent to selectively displace the target molecules from the adsorbent while leaving the non-target molecules adsorbed. The chemical displacement causes the displaced target molecules to enter the gas stream. The gas stream can then be passed through a semiconducting metal oxide based sensor to detect the target molecules.

Abstract: A process for removing a (hydro)haloalkene impurity from a product stream containing that impurity and a desired compound is described. The process comprises contacting the product stream with a solid adsorbent comprising pores having openings which have a size across their largest dimension in the range of from about 7 Å to about 10 Å. The process is particularly suited to the removal of (hydro)halopropene impurities from saturated hydrofluorocarbons such as a tetrafluoroethane, a pentafluoropropane, a hexafluoropropane or a heptafluoropropane.

Abstract: The invention relates to a material for treating gaseous media containing volatile organic components. According to the invention, the material is porous and exhibits an absorption capacity of approximately 20-30% in relation to the dry weight thereof, containing approximately 47-52% by weight of a composite carbon and silicon structure, approximately 12-20 wt. % carbon, approximately 5-7 wt % hydroxyl, and approximately 1-2 wt % oxygen. The invention can be used in atmospheric treatment for the preservation of living matter.

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 cigarette filter having a reagent which chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded to a non-volatile inorganic substrate which is incorporated in the filter. The filter can remove gaseous components such as aldehydes from tobacco smoke. Preferred functional groups are 3-aminopropylsilyl groups covalently bonded to silica gel (APS silica gel). The reagent can be contained in a space in the filter or incorporated in one or more filter elements such as tipping paper, shaped paper insert, mouthpiece plug, solid filter element, or free-flow filter element. The reagent can be part of or coated on paper such as tipping or filter paper or incorporated in non-paper filter elements formed from fibrous materials such as cellulose acetate or polypropylene fibers. Other preferred reagents include aminoethylaminopropylsilyl (AEAPS) silica gel and aminoethylaminoethylaminopropylsilyl (AEAEAPS) silica gel.

Abstract: Volatile organic compounds, for example organophosphonate compounds including chemical warfare agents, pesticides, and solvents, are decomposed by contacting the compounds with either a manganese oxide catalyst in the presence of visible light or a catalyst material selected from the group consisting of vanadium, vanadium oxide, manganese oxide and mixtures thereof deposited upon a catalyst support that is heated to at least 300° C. The catalyst material may be regenerated by a process selected from the washing with water, washing with a solvent, heating, exposing to light, purging with oxygen, purging with a reactive gas, exposing to microwave radiation, and combinations thereof. The catalyst composition may be used as an air filter in a vehicle, a building or a personnel protection device, such as a gas mask.

Abstract: The present invention provides a process for eliminating halogen-containing compounds contained in a gas or a liquid, characterized in that the gas or liquid is brought into contact with a composition based on an alumina and/or a hydrated alumina and at least one compound (A) comprising at least one metallic element selected from metals from groups VIII, IB and/or IIB of the periodic table, and in that the total metallic element(s) content is at most 45% by weight with respect to the total composition weight, the complement by weight preferably comprising in a major part alumina and/or hydrated alumina.

Abstract: The present invention relates to high oxygen ion conducting/oxygen storage (OIC/OS) capacity materials, a catalyst employing the OIC/OS materials, and a method for converting hydrocarbons, carbon monoxide and nitrogen oxides using the catalyst. The OIC/OS materials have stable cubic crystalline structures such that after aging for greater than about 36 hours at temperatures up to about 1,200° C., greater than about 60-95% of the cerium present is reducible. These materials comprise up to about 95 mole percent (mole %) zirconium, up to about 50 mole % cerium, up to about 20 mole % of a stabilizer such as yttrium, rare earths, and the like; and about 0.01 to about 25 mole % of a base metal selected from the group consisting of iron, copper, cobalt, nickel, silver, manganese, bismuth and mixtures comprising at least one of the foregoing metals.

Abstract: Process for the removal of higher hydrocarbons contained in natural gas further containing sulphur compounds by simultaneous conversion of the hydrocarbons to aromatic compounds and methane in presence of a catalyst comprising a crystalline alumino silicate having in its anhydrous state a formula expressed in terms of mole ratios as follows:

Abstract: Disclosed is a method for cleaning of the harmful gas, the method comprising mixing harmful gas, discharged from reaction processes using organic metal compounds as the reaction raw materials, with oxygen or air and thereafter bringing the mixture into contact with a catalyst obtained by carrying a noble metal on an inorganic support, a catalyst comprising at least one metal oxide selected from vanadium oxide, chromium oxide, manganese oxide, iron oxide, copper oxide, silver oxide, cobalt oxide and nickel oxide or a catalyst obtained by carrying the metal oxide on an inorganic support, at temperatures between 100° C. and 800° C. to clean the harmful gas. Disclosed also is an apparatus used in the method. The invention ensures that harmful components can be purified in an efficient manner without discharging organic compounds and a large amount of carbon dioxide after the harmful gas is purified, requiring no aftertreatment.

Abstract: A method, system and catalysts for improving the yield of syngas from the catalytic partial oxidation of methane or other light hydrocarbons is disclosed. The increase in yield and selectivity for CO and H2 products results at least in part from the substitution of H2S partial oxidation to elemental sulfur and water for the combustion of light hydrocarbon to CO2 and water.

Abstract: A process and a plant for removing the gaseous fluorocompounds or fluorosulphur compounds, such as CF4, C2F6, and SF6, present in a stream of xenon and/or krypton, by permeation via one or more membranes, such as polymer membranes. The xenon and/or krypton thus produced may then be further purified or separated by cryogenic distillation. Prior to the permeation step, the other impurities, particularly the hydrocarbons, may be removed by oxidative catalysis and subsequent adsorption of the carbon dioxides and of the water produced. The xenon, the krypton and the xenon/krypton mixtures free of gaseous fluorocompounds or fluorosulphur compounds and purified by such process can be used as plasma propulsion gas, especially for satellites, or as inter-pane insulation gas for a sealed unit, particularly for double-glazing windows.

Abstract: A photocatalytic device for photocatalytically treating evaporative emissions comprises a substrate with a photocatalyst. A shell is disposed about the substrate, and can optionally comprises one or more sections of transparent material capable of being penetrated by an ultra violet light. Additionally, sealing agent can optionally be disposed between the shell and sections of transparent material to provide a gas tight seal.

Abstract: Method for cleaning the atmosphere by adsorbing pollutants, e.g., hydrocarbons, ozone, carbon monoxide, nitrogen oxides, sulfur oxides, etc., contained in the atmosphere. The pollutant-containing atmosphere is contacted with an outer surface of a substrate, e.g., radiators, condensers, charge air coolers, transmission coolers, etc., which has been coated with an adsorptive material such as zeolites, molecular sieves, carbon, etc. The coated substrate is protected with an overcoat of at least one porous protective material such as alumina, silica and the like, such that the pollutants will come into contact with the adsorptive material, but harmful contaminants will be prevented from contacting the adsorptive material.

Abstract: The invention discloses a method for processing alkene-containing exhaust gas. It is a combination of ozonic and biological processes which mainly deal with exhaust gas mixtures having alkene-containing (C—C double bond) organic exhaust gas (such as alkene, acrylic acid) and other volatile organic compounds (such as ketone, alcohol, BTEX, and others). Since exhaust gas containing C—C double bond is difficult to dispose of, the method for processing exhaust gas presented in the invention utilizes ozone to completely decompose or transform the organic contaminants with C—C double bonds into intermediate products. The organic contaminant can then be treated in the biological process and converted into non-toxic substances. This method does not require large-sized biological process equipment, and the residual ozone is oxidized and degraded in the bio-filter.

Abstract: In an air conditioning system which includes a catalytic air purifier, a control system is provided for sensing the level of predetermined conditions in a space and for responsively modulating the air purification process in a manner which optimizes the process in terms of its effectiveness and its economical use. The conditions that are sensed include the levels of VOC's, CO2, and biological contaminants, as well as degree of occupancy, relative humidity and air flow. The air purification process is modulated by varying the power to a UV lamp, turning one or more UV lamps on or off, varying the effectiveness of the catalyst, varying the volume or speed of the air flowstream and/or varying the relative humidity in the space.

Abstract: A process for producing a purified gaseous product from a gaseous feedstream such as air containing impurities is disclosed. The impurities such as hydrogen, water vapor, carbon monoxide and carbon dioxide are removed from the gaseous feedstream in a vessel having layers of adsorbents and oxidation catalysts. The placement of the hydrogen to water vapor conversion catalyst downstream of the step of contacting the feedstream with a catalyst to convert the carbon monoxide to the carbon dioxide and the step of removing the carbon dioxide from the feedstream improves not only performance but also the economies of the purification system.

Abstract: The present invention relates to a method for recovering and/or removing organic compounds from gas flows, wherein the method comprises the step of: removing the organic compounds from the gas flow using an adsorber and desorbing the organic compounds using microwaves, characterized in that the adsorber is a finely dispersed mixture of a hydrophilic and a hydrophobic adsorbent.

Abstract: A polluted fluid, such as exhaust gas from a refuse incinerator, containing at least one pollutant, such as volatile organic compounds (VOCs), SOx or NOx, is processed by passing the polluted fluid through an adsorbing layer containing a high-silica adsorbent capable of adsorbing both ozone and at least one pollutant to adsorb at least one pollutant on the adsorbent. Then, ozone is brought into contact with the adsorbing layer to oxidize and decompose the pollutant adsorbed on the adsorbent, while stopping the flow of the polluted fluid.

Abstract: Apparatus and method for abatement of effluent from multi-component metal oxides deposited by CVD processes using metal source reagent liquid solutions which comprise at least one metal coordination complex including a metal to which is coordinatively bound at least one ligand in a stable complex and a suitable solvent medium for that metal coordination complex e.g., a metalorganic chemical vapor deposition (MOCVD) process for forming barium strontium titanate (BST) thin films on substrates. The effluent is sorptively treated to remove precursor species and MOCVD process by-products from the effluent. An endpoint detector such as a quartz microbalance detector may be employed to detect incipient breakthrough conditions in the sorptive treatment unit.

Abstract: An ordinary-temperature purifying catalyst includes an oxide having an oxygen defect introduced by a reduction treatment, and a noble metal loaded on the oxide. For example, the oxide can be at least one oxide selected from the group consisting of cerium oxides and zirconium oxides, at least a part of which has an oxygen defect. The catalyst can purify an environmental loading material, such as carbon monoxide, a nitrogen oxide, ethylene, formaldehyde, trimethylamine, methyl mercaptan and acetaldehyde, in air at an ordinary temperature. A method for how to use the catalyst is also disclosed.

Abstract: Alkaline earth metal alkylene diamides of Ba, Sr, Ca and a method for their production.

Abstract: A solid combination of elemental sulfur and an inorganic support material prepared in an inert atmosphere to provide a composition for absorbing trialkyl arsines. The composition prepared thereby and the method for absorbing trialkyl arsines using the composition.