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6656439 |
Pillared trioctahedral micas and/or vermiculites
Pillared trioctahedral micas and/or vermiculites are prepared. The process includes a conditioning operation for the partial reduction of the layer charge through an accelerated weathering process,...
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6652821 |
Purificating agent for flue gas and incinerated ash and purificating method using the same
The present invention provides a purifying agent having an effect of removing or decomposing toxic substances contained in flue gas or incinerated ash. The purifying agent of the present invention...
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6649133 |
Catalyst for purifying exhaust gas, process for producing the same, and method for purifying exhaust gas
A catalyst for purifying an exhaust gas includes a support including rutile titania, an NO x storage material including at least on element selected from alkali metals, alkaline-earth metals and...
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6649134 |
Method and apparatus for reducing nitrous oxide
A process and a device for reducing the nitrous oxide which is formed during the catalytic combustion of ammonia and oxygen to form nitrogen oxides. A catalyst system including at least one first...
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6645447 |
Devices and method for chemical reactive filtration
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...
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6645902 |
Adsorbent having capability of decomposing organic halogen compounds and method for producing the same
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...
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6641785 |
Catalytic converter and method for cleaning exhaust gas
The invention relates to a catalytic converter and a method for cleaning the exhaust gas from an internal combustion engine which is operated with excess air. The catalytic converter has an active...
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6641788 |
Absorbent for a hydrocarbon, and exhaust gas-purifying catalyst
An adsorbent for a hydrocarbon, comprising a calcined β-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...
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6641790 |
Method for removing nitrogen oxides using natural manganese ores
There is disclosed a method for removing nitrogen oxides of exhaust gas using natural manganese ores. In the method, ammonia is used as a reductant to selectively reduce the nitrogen oxides in the...
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6641789 |
Device and method for decomposing nitrogen oxides
A device for decomposing the oxides of nitrogen (No x ) contained in effluent compositions, such as the exhaust gases generated by automotive combustion engines, is described. In one embodiment,...
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6638485 |
Process for treating exhaust gas and exhaust gas treating equipment
A process for treating an exhaust gas contaminated with dust, Hg, NO x , and SO x is provided by adding a mercury chlorinating agent, such as, for example, HCl, NH 4 Cl, or Cl 2 , and ammonia to...
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6625976 |
Three-way conversion catalysts and methods for the preparation therefor
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...
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6623716 |
Exhaust gas purifying catalyst
An exhaust gas purifying catalyst for purifying exhaust gas discharged from an automotive internal combustion engine. The exhaust gas purifying catalyst comprises at least one noble metal selected...
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6623715 |
Complex shaped fiber for particle and molecular filtration
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...
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6620391 |
Process for the catalytic cleaning of the exhaust gas from a combustion plant
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...
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6620393 |
Method and apparatus for reducing “ammonia slip” in SCR and/or SNCR NOx removal applications
A method and apparatus for reducing the amount of unused ammonia (“ammonia slip”) in instances where ammonia is provided to SNCR and/or SCR processes for reducing NOx pollution in flue gas...
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6620392 |
Catalyst for purifying exhaust gas and method for purifying exhaust gas with the catalyst
The present invention provides a catalyst for purifying an exhaust gas having excellent heat resistance and a small level of deterioration of the purifying ability of the exhaust gas even if the...
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6616903 |
Method and apparatus for treating the atmosphere
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...
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6616904 |
Method of removing nitrogen oxides using an ilmenite material
The invention relates to materials for removing the nitrogen oxides NO and NO 2 present in exhaust gases, particularly from internal combustion engines of automotive vehicles running in a medium...
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6613299 |
Catalyzed diesel particulate matter exhaust filter
A catalyzed diesel particulate matter exhaust filter including a porous filter substrate for filtering the diesel particulate matter impregnated with a catalytic material which includes an alkaline...
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6602479 |
Exhaust gas purifying catalyst
An exhaust gas purifying catalyst having a refractory three-dimensional structure coated with a catalytically active component comprising at least one kind of noble metals, a refractory inorganic...
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6596247 |
Method for purifying exhaust gas from internal combustion engines
A catalyst being formed of a porous supporter supporting alkali metals, Ti and noble metal, or further supporting at least one of rare earth metal and magnesium, being disposed in a flow passage of...
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6592833 |
Method of NOx abatement in high temperature lean NOx catalyst systems
A method of NOx abatement comprising the steps of generating a gas stream containing hydrocarbons and NOx, maintaining the temperature of the gas stream within the range of about 150° C. to about...
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6585944 |
Enhancement of the OSC properties of Ce-Zr based solid solutions
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...
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6579820 |
Reactor modifications for NOx reduction from a fluid catalytic cracking regeneration vessel
A process for regenerating a spent catalyst having coke deposits thereon in a catalyst regeneration vessel having a dense phase and a dilute phase, wherein the process comprises the steps of: (a)...
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6569394 |
Catalyst body and process for breaking down nitrogen oxides
A gas stream that contains nitrogen oxides is passed, in the presence of a reducing agent, over a catalyst body with an active material that contains a zeolite and titanium dioxide. The zeolite is...
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6569392 |
Three-way rare earth oxide catalyst
The invention is a method of manufacturing a three-way catalyst and the catalyst as well as its use for treating exhaust gas generated by a gasoline internal combustion engine. The catalyst...
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6558454 |
Method for removal of vapor phase contaminants from a gas stream by in-situ activation of carbon-based sorbents
A process for removing vapor phase contaminants from a gas stream includes the step of adding a raw carbonaceous starting material into a gas stream having an activation temperature sufficient to...
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6555081 |
Method of the purification of the exhaust gas from a lean-burn engine using a catalyst
A catalyst for purifying the exhaust gas from a lean-burn engine, which includes a refractory inorganic oxide carrying platinum thereon, a cerium-containing oxide carrying palladium thereon, and an...
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6551565 |
Process of removing nitrogen oxides from flue gases from a fluidized catalytic cracking unit
A process for removing nitrogen oxides from flue gases of a fluidized catalytic cracking unit wherein the flue gas is introduced into a tertiary cyclone with percentages of separated solids being...
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6551564 |
Process for eliminating oxides of nitrogen
The invention concerns materials for eliminating oxides of nitrogen NO and NO 2 present in exhaust gases, in particular from the internal combustion engines of automotive vehicles operating in a...
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6548033 |
Spare selective catalytic reduction reactor system
A system of selective catalytic reduction units for reducing nitrogen oxides by operating a plurality of parallel combustion units in parallel with a spare selective catalytic reduction reactor is...
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6539709 |
Exhaust gas purifying system of internal combustion engine
A first NOx-trapping catalyzer unit is disposed on an upstream part of an exhaust passage. A second NOx-trapping catalyzer unit is disposed on a downstream part of the exhaust passage. A structure...
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6534439 |
Catalyst for reducing nitrogen oxides in oxidizing and reducing atmospheres
A catalyst for reducing nitrogen oxides in oxidizing and reducing atmospheres which contains iridium on a support material. Silicon dioxide or a dealuminized zeolite in the acid H form with a...
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6524372 |
Silica gel incorporating polyazacycloalkane structural units
A novel compound which can be used in the field of separation and purification of gases is disclosed. The compound can be incorporated into a silica gel incorporating polyazacycloalkane structural...
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6517794 |
Method for removing nitrogen oxides from an oxygen-containing flue gas stream
A method for removing nitrogen oxides from a lean flue gas. The method is carried out by: a) treating the flue gas in an electrical gas discharge, b) passing the thus treated flue gas over a basic...
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6517797 |
Process for separation of NOx from N2O in a mixture
The present invention is a reactive adsorption process for separating NO x (NO and NO 2 /N 2 O 4 ) from N 2 O in a mixture. The process comprises (A) selectively converting NO to NO 2 /N 2 O 4 in...
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6514320 |
Process for absorbing nitrogen oxides from gas mixtures containing said oxides
A process for absorbing nitrogen oxides, comprising the step of placing gas mixtures containing nitrogen oxides in contact with absorbent compounds constituted by mixed copper oxides chosen among...
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6511640 |
Purification of gases
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...
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6511642 |
Porous material, catalyst, method of producing the porous material and method for purifying exhaust gas
Disclosed are a porous material comprising particles without substantial fibrous structure and having pores, the pores having a mean pore diameter in a meso-pore region, sharp pore size...
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6506350 |
Method using on site generated ammonia to reduce particulates in combustion gas streams
This patent describes technology for generating ammonia from urea. The method is based on the hydrolysis of an aqueous solution of urea and/or biuret by heating under pressure to form a mixture of...
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6506351 |
Removal of nitrogen oxides from gas streams
The present invention relates to a process for removing nitrogen oxides from gas streams such as furnace or utility boiler flue gas streams. An adsorber system is used to adsorb nitrogen oxides...
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6503469 |
Method for processing polluted fluid containing pollutants
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...
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6503472 |
Method for removal of nitrogen oxides from gaseous streams by cayalytic carbon in the presence of ammonia
An improved process is provided for the chemical conversion and removal of nitrogen oxides from gaseous streams containing a stoichiometric amount of ammonia by contacting a low temperature...
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6500398 |
Method and apparatus for decomposing N2O
A low-cost and practically useful method for preventing global warming by decomposing N 2 O wherein N 2 O contained in an N 2 O-containing gas to be treated can be decomposed at a relatively low...
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6491885 |
Exhaust gas processing method
An ammonia generating method characterized by generating ammonia by the contact hydrolysis of urea by contacting at 200° C. or more an aqueous solution of urea with a contact hydrolysis catalyst...
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6492298 |
Ordinary-temperature purifying catalyst
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...
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6491886 |
Method for treating gases to reduce nitrogen oxide emissions
The present invention relates to a process for treating gases to reduce emissions of oxides of nitrogen. This process is of the type in which a catalytic composition is used which comprises a...
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6488906 |
Method for removing nitrogen oxides in exhaust gas
A process for removing nitrogen oxides in exhaust gases is provided. The process comprises mixing an exhaust gas generated during the chemical vapor deposition process for producing semiconductors...
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6488903 |
Method for cleaning diesel engine exhaust gas
A method for cleaning diesel engine exhaust gas is described. The exhaust gas is passed over a catalytic converter with an active material which contains (% by weight) 70-95% TiO 2 , 2-10% WO 3 ...
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