Matches 1 - 50 out of 288 1 2 3 4 5 6 >


Match Document Document Title
US20140127098 Ammonia Slip Reduction  
A method for controlling injection of a reductant into an exhaust system of an internal combustion engine, which includes measuring temperature at a plurality of locations in the exhaust system...
US20150010451 CATALYTIC REDUCTION OF NOx  
A system for NOx reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO2, particulate filter, a source of...
US20150113964 SYSTEMS AND METHODS FOR CONTROL OF ENGINE NOX EMISSIONS USING LIQUID AND DRY REDUCTANT SOURCES  
Reductant delivery systems are disclosed that include a dry reductant source and a liquid reductant source which are operable to selectively provide gaseous reductant and liquid reductant to an...
US20140271423 CATALYTIC REDUCTION OF NOX  
A system for NOx reduction in combustion gases, especially from diesel engines, incorporates an oxidation catalyst to convert at least a portion of NO to NO2, particulate filter, a source of...
US20120275978 System for Reducing NOx in Exhaust  
A system and method for NOx reduction is described, with a catalytic unit including a first zeolite catalyst with a first NOx conversion performance in a first temperature range and a second NOx...
US20150247437 SYSTEMS AND METHODS FOR NOx REDUCTION AND AFTERTREATMENT CONTROL USING PASSIVE NOx ADSORPTION  
Systems and methods for managing aftertreatment systems that include passive NOx adsorption devices and SCR catalyst elements are disclosed. Temperature generation devices upstream of the passive...
US20150040543 METHOD AND SYSTEM FOR IDENTIFYING A SOURCE OF NITROGEN OXIDE REDUCTION INEFFICIENCY  
System and methods can identify a source of nitrogen oxide reduction inefficiency in an exhaust system including first and second selective catalytic reduction (SCR) catalysts connected in series...
US20150004083 INJECTOR BOSS AND SYSTEM AND METHOD OF INJECTING LIQUID INTO A GAS STREAM  
An injector boss (114) for mounting an injector (110) that injects liquid reductant (U) into a flow of exhaust gas (EG) in an exhaust pipe (116) includes at least one sidewall (124) and a boss...
US20140090374 EXHAUST AFTERTREATMENT SYSTEM AND METHOD  
An engine exhaust gas treatment system includes an oxidation catalyst, a NOX adsorber, and a turbine. The oxidation catalyst and the NOX adsorber are fluidly connected to an exhaust manifold of...
US20130047581 Reagent Dosing System  
A method of injecting a reagent into a stream of exhaust output from an engine to change the composition of the exhaust includes obtaining a target reagent injection rate. A calculation period is...
US20140127100 METHOD FOR THE PRODUCTION OF AMMONIA FROM AN AMMONIA PRECURSOR SUBSTANCE IN ORDER TO REDUCE NITROGEN OXIDES IN EXHAUST GASES  
The present invention relates to a method for generating ammonia from an ammonia precursor substance and to the use thereof for reducing nitrogen oxides in exhaust from industrial facilities, from...
US20130232958 SYSTEM AND METHOD TO MANAGE SCR CATALYST NO2/NOX RATIO  
Systems and methods are provided for determining and controlling an NO2 to NOx ratio reference target in an exhaust conduit between a first SCR catalyst and a second SCR catalyst. The method...
US20140363358 EXHAUST AFTERTREATMENT SYSTEM AND METHOD FOR OPERATING THE SYSTEM  
An exhaust system includes a first SCR catalyst and a second SCR catalyst positioned downstream of the first SCR catalyst. A first injector is provided upstream of the first SCR catalyst, and a...
US20150251136 Formaldehyde Emission Reduction in Natural Gas Fired Reciprocating Internal Combustion Engines (RICE)  
Exhaust from an NG fired stationary or non-stationary RICE, such as, for example, a lean burn RICE, is directed to a first oxidation catalyst, then to a second oxidation catalyst. The second...
US20140248201 SCRUBBER SYSTEM AND METHOD  
The present invention relates to a method for removal of SO2 from exhaust gas from a marine engine or a marine boiler of a ship. The exhaust gas from said marine engine or marine boiler is cooled...
US20140147356 AMMONIA GAS GENERATOR AND METHOD FOR PRODUCING AMMONIA IN ORDER TO REDUCE NITROGEN OXIDES IN EXHAUST GASES  
The invention relates to an ammonia gas generator for producing ammonia from an ammonia precursor substance as well as the use thereof in exhaust aftertreatment systems. The invention further...
US20150118133 SYSTEM AND METHOD FOR TREATING EXHAUST PIPE  
The system for treating exhaust gas comprises an exhaust duct, a catalytic converter arranged in the exhaust duct and an injector for injecting a substance into the system. The system further...
US20140112851 SUPPLEMENTAL AMMONIA STORAGE AND DELIVERY SYSTEM  
An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary NOx reducing systems for delivering reductant (e.g. urea and ammonia) to an...
US20070297961 System for removing sulfur oxides from recycled exhaust  
A system and method for treating exhaust gas are provided. The system has a source of combustion exhaust, a first fluid passageway and a second fluid passageway. The first fluid passageway directs...
US20140127097 AMMONIA FLOW CONTROL  
A method for controlling injection of a reductant into an exhaust system of an internal combustion engine includes determining the temperature and pressure of reductant supplied to a reductant...
US20080069750 Ammonia Vapor Storage and Purge System and Method  
A method of operating a reductant delivery and storage system of a vehicle, comprising of storing an ammonia-containing fluid in a first storage device, generating ammonia vapors in the first...
US20140369911 DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHAUST SYSTEMS  
A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, acetaldehyde, propianaldehyde, or butyraldehyde, and this formulation of DEF include...
US20140369910 DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHAUST SYSTEMS  
A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron,...
US20140105799 EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE  
A method for purifying exhaust gas of an internal combustion engine, including chemically reducing NOx that is contained in the exhaust gas when a concentration of hydrocarbons flowing into an...
US20130195741 CATALYZED SOOT FILTERS, SYSTEMS AND METHODS OF TREATMENT  
Catalyzed soot filters comprising a wall flow monolith having a washcoat comprising an alkali base metal composite disposed on the monolith. Methods of manufacturing and using catalyzed soot...
US20150224447 EXHAUST GAS PROCESSING DEVICE, DIESEL ENGINE, AND EXHAUST GAS PROCESSING METHOD  
An exhaust gas processing device includes a NOx detection sensor, a first catalyst provided to a first branch pipe, a second catalyst provided to a second branch pipe, a first pressure sensor and...
US20150231558 COMBINED CLEANING SYSTEM AND METHOD FOR REDUCTION OF SOX AND NOX IN EXHAUST GASES FROM A COMBUSTION ENGINE  
A combined cleaning system to be used in a wet scrubber process for reducing SOX and NOX in exhaust gases from a combustion engine comprises an Exhaust Gas Cleaning (EGC) scrubber and an Exhaust...
US20140072494 Treatment of Cold Start Engine Exhaust  
The present invention relates to a process for reducing cold start emissions in an exhaust gas stream by contacting the exhaust stream with a combination of molecular sieves comprising (1) a small...
US20150217230 Compact Selective Catalytic Reduction System for Nitrogen Oxide Reduction in the Oxygen-rich Exhaust of 500 to 4500 kW Internal Combustion Engines  
A very compact Selective Catalytic Reduction (SCR) system with a very low footprint comprising an SCR reactor, an inlet flow system, and a vaporizer module is described. The SCR reactor comprises...
US20140154159 Engine Exhaust Aftertreatment Component Including Aftertreatment Brick Module  
An engine exhaust aftertreatment component includes a housing defining an exhaust flow path from an exhaust inlet to an exhaust outlet. The housing supports an internal support channel. An...
US20140241963 COLD START STARTUP UNIT FOR UREA-BASED SYSTEMS  
An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary NOx reducing systems for delivering reductant to an exhaust stream, a sensor...
US20130202507 METHOD FOR TREATING NOX IN EXHAUST GAS AND SYSTEM THEREFORE  
The present invention relates to a method for the treatment of an exhaust gas comprising NOx, wherein the method comprises the step of subjecting the exhaust gas to an exhaust gas treatment system...
US20140314645 SCR CATALYST AMMONIA SURFACE COVERAGE ESTIMATION AND CONTROL  
Described herein are various embodiments of an apparatus, a system, and a methods for reducing NOx emissions using ammonia storage on an SCR catalyst. For example, according to one embodiment, an...
US20150151251 METHOD FOR DIAGNOSING A SELECTIVE CATALYTIC REDUCTION CATALYST  
A method for diagnosing a selective catalytic reduction (SCR) catalyst of an exhaust aftertreatment system of an internal combustion engine includes ensuring that a SCR catalyst NH3 storage level...
US20150104363 REAGENT DOSER DIAGNOSTIC SYSTEM AND METHOD  
Systems and methods are disclosed for determining or diagnosing a reagent dosing system failure to provide sufficient reagent to an exhaust aftertreatment system that includes an SCR catalyst to...
US20150113966 AFTERTREATMENT SYSTEMS WITH REDUCED N2O GENERATION  
Systems, apparatus and methods are disclosed for reducing the amount of nitrous oxide (N2O) produced in a selective catalytic reductant (SCR) catalyst in an exhaust aftertreatment system. The SCR...
US20150238897 A SYSTEM, A USE OF SUCH A SYSTEM AND A MULTI SYSTEM FOR CLEANING EXHAUST GAS  
A system, a use of such a system and a multi system for cleaning exhaust gas from a combustion engine. The system comprises a first exhaust gas scrubber to communicate with a scrubber water...
US20130028817 DIESEL EXHAUST FLUID FORMULATION HAVING A HIGH AMMONIUM CONTENT AND A LOW FREEZING POINT  
A mixture of urea, water and ammonium carbamate is formulated for use in the catalytic reduction of oxides of nitrogen in diesel exhaust. The mixtures may be formulated to optimize the amount of...
US20140260213 Aftertreatment System For Simultaneous Emissions Control In Stationary Rich Burn Engines  
A catalyst system may include a three-way catalyst that may receive exhaust gases from an engine and convert the exhaust gases to first converted exhaust gases. An ammonia slip catalyst may...
US20140301925 ENHANCED REAL-TIME AMMONIA SLIP DETECTION  
Systems and methods for detecting ammonia slip in an exhaust system based upon transient NOx sensor responses are described. In one example method, an exhaust system allocates tailpipe NOx sensor...
US20130034484 REDUCTION OF OXIDES OF NITROGEN IN A GAS STREAM USING MOLECULAR SIEVE SSZ-28  
The invention relates generally to molecular sieve SSZ-28 and its use in the reduction of oxides of nitrogen in a gas stream such as the exhaust from an internal combustion engine.
US20130034483 REDUCTION OF OXIDES OF NITROGEN IN A GAS STREAM USING MOLECULAR SIEVE SSZ-25  
The invention relates generally to molecular sieve SSZ-25 and its use in the reduction of oxides of nitrogen in a gas stream such as the exhaust from an internal combustion engine.
US20130034482 REDUCTION OF OXIDES OF NITROGEN IN A GAS STREAM USING MOLECULAR SIEVE SSZ-23  
The invention relates generally to molecular sieve SSZ-23 and its use in the reduction of oxides of nitrogen in a gas stream such as the exhaust from an internal combustion engine.
US20140056790 CONTROL TECHNIQUES FOR AN SCR AFTERTREATMENT SYSTEM  
A method includes providing: a selective catalytic reduction (SCR) catalyst disposed in an exhaust gas stream of an internal combustion engine, a reagent injector operationally coupled to the...
US20120230894 Urea-Resistant Catalytic Units And Methods of Using The Same  
According to at least one aspect of the present invention, a urea-resistant catalytic unit is provided. In at least one embodiment, the catalytic unit includes a catalyst having a catalyst...
US20120294786 EXHAUST PURIFICATION DEVICE AND EXHAUST PURIFICATION METHOD FOR DIESEL ENGINE  
Provided are an exhaust purification device for a diesel engine, and an exhaust purification method that utilizes this exhaust purification device enabling effective utilization of exhaust gas...
US20120315204 EXHAUST PURIFICATION DEVICE AND EXHAUST PURIFICATION METHOD FOR DIESEL ENGINE  
Provided are an exhaust purification device for a diesel engine and an exhaust purification method that utilizes the exhaust purification device enabling effective utilization of exhaust gas heat...
US20110236280 METHOD FOR PURIFYING EXHAUST GAS AND SYSTEM THEREFORE  
A method is provided for purifying exhaust gas from an engine having an exhaust passage with a selective reducing catalyst and an oxidation catalyst upstream of the selective reducing catalyst....
US20120020875 CATALYST FOR REDUCING NITROGEN OXIDES AND METHOD FOR PRODUCING THE SAME  
The object is to provide an exhaust gas reduction catalyst that exhibit high nitrogen oxide reduction performance, and to provide a simple and efficient method for producing the catalyst, in which...
US20140127099 Device for Purifying Exhaust Gases from a Heat Engine, Comprising a Catalytic Ceramic Support Comprising an Arrangement of Essentially Identical Crystallites  
Device for purifying exhaust gases from a thermal combustion engine, comprising a catalytic ceramic carrier comprising an arrangement of crystallites of the same size, same isodiametric morphology...

Matches 1 - 50 out of 288 1 2 3 4 5 6 >