Rasto Brezny - Academia.edu (original) (raw)

Papers by Rasto Brezny

Research paper thumbnail of Ceric Oxide Washcoat

Research paper thumbnail of Porous ceramic beads

Research paper thumbnail of Ceric oxide washcoat

Research paper thumbnail of Application d'un catalyseur sur un substrat metallique faisant simultanement appel a un depot electrophoretique et materiau d'adhesion du catalyseur

Cette invention concerne des elements catalyseurs (7) flexibles et a feuille metallique, lesquels... more Cette invention concerne des elements catalyseurs (7) flexibles et a feuille metallique, lesquels peuvent etre utilises dans des dispositifs catalytiques servant a regler les emissions de moteurs a combustion. Ces elements sont prepares par depot electrophoretique d'une bouillie aqueuse (17) contenant le materiau dont est faite la couche de support du catalyseur, ainsi que le catalyseur proprement dit. La couche deposee (8) possede une epaisseur uniforme et une surface stable. Les elements catalyseurs (7) decrits dans la presente invention peuvent etre notamment utilises dans des applications ayant trait au domaine de l'industrie automobile, et plus particulierement dans des convertisseurs catalytiques a chauffage electrique.

Research paper thumbnail of Catalyst support material with high oxygen storage capacity and process for its manufacture

Research paper thumbnail of On-road gaseous and particulate emissions from GDI vehicles with and without gasoline particulate filters (GPFs) using portable emissions measurement systems (PEMS)

Science of The Total Environment

• Catalyzed GPFs showed significant reductions in real-world PM emissions. • Urban and high-altit... more • Catalyzed GPFs showed significant reductions in real-world PM emissions. • Urban and high-altitude driving showed elevated PM emissions. • Highest particle number concentrations were seen for low speeds and positive accelerations. • Real-world NOx emissions showed reductions with the catalyzed GPFs.

Research paper thumbnail of Solid Particle Number and Ash Emissions from Heavy-Duty Natural Gas and Diesel w/SCRF Engines

SAE Technical Paper Series

Research paper thumbnail of Catalyzed Gasoline Particulate Filters Reduce Secondary Organic Aerosol Production from Gasoline Direct Injection Vehicles

Environmental Science & Technology

The effects of photochemical aging on exhaust emissions from two light-duty vehicles with gasolin... more The effects of photochemical aging on exhaust emissions from two light-duty vehicles with gasoline direct injection (GDI) engines equipped with and without catalyzed gasoline particle filters (GPFs) were investigated using a mobile environmental chamber. Both vehicles with and without the GPFs were exercised over the LA92 drive cycle using a chassis dynamometer. Diluted exhaust emissions from the entire LA92 cycle were introduced to the mobile chamber and subsequently photochemically reacted. It was found that the addition of catalyzed GPFs will significantly reduce tailpipe particulate emissions and also provide benefits in gaseous emissions, including nonmethane hydrocarbons (NMHC). Tailpipe emissions composition showed important changes with the use of GPFs by practically eliminating black carbon and increasing the fractional contribution of organic mass. Production of secondary organic aerosol (SOA) was reduced with GPF addition, but was also dependent on engine design which determined the amount of SOA precursors at the tailpipe. Our findings indicate that SOA production from GDI vehicles will be reduced with the application of catalyzed GPFs through the mitigation of reactive hydrocarbon precursors.

Research paper thumbnail of Gasoline Particulate Filters as an Effective Tool to Reduce Particulate and PAH Emissions from GDI Vehicles: A Case Study with Two GDI Vehicles

Environmental science & technology, Jan 15, 2018

We assessed the gaseous, particulate, and genotoxic pollutants from two current technology gasoli... more We assessed the gaseous, particulate, and genotoxic pollutants from two current technology gasoline direct injection vehicles when tested in their original configuration and with a catalyzed gasoline particulate filter (GPF). Testing was conducted over the LA92 and US06 Supplemental Federal Test Procedure (US06) driving cycles on typical California E10 fuel. The use of a GPF did not show any fuel economy and carbon dioxide (CO2) emission penalties, while the emissions of total hydrocarbons (THC), carbon monoxide (CO), and nitrogen oxides (NOx) were generally reduced. Our results showed dramatic reductions in particulate matter (PM) mass, black carbon, and total and solid particle number emissions with the use of GPFs for both vehicles over the LA92 and US06 cycles. Particle size distributions were primarily bimodal in nature, with accumulation mode particles dominating the distribution profile and their concentrations being higher during the cold-start period of the cycle. Polycycli...

Research paper thumbnail of Assessment of the Fuel Composition Impact on Black Carbon Mass, Particle Number Size Distributions, Solid Particle Number, Organic Materials, and Regulated Gaseous Emissions from a Light-Duty Gasoline Direct Injection Truck and Passenger Car

Research paper thumbnail of Sulfur Tolerant Alumina Catalyst Support

The present invention relates to a process for the preparation of my redundancy alumina, the meth... more The present invention relates to a process for the preparation of my redundancy alumina, the method, in the aqueous medium, the charged opposite preparing an aluminum hydrate (each of the salt of aluminum cation or aluminum anions, and the other hand from one or more water-soluble aluminum salt including an ion), contacting the aluminum hydrate, in said aqueous medium, and in the presence of one or more aluminum salt counterion, silica precursor, silica precursor from the aqueous medium and separating the aluminum hydrate particles contact , and the silica precursor by calcining the contacted aluminum hydrate particles, and a step of producing the particles of sulfur in the alumina.

Research paper thumbnail of Barrier for a Metal Substrate

Research paper thumbnail of Metal foil catalyst members by aqueous electrophoretic deposition

Research paper thumbnail of Method of making microcellular ceramic bodies

Research paper thumbnail of Low density glassy materials for bioremediation supports

Research paper thumbnail of Method for making sintered bodies

Research paper thumbnail of Characterization of Real-Time Particle Emissions from a Gasoline Direct Injection Vehicle Equipped with a Catalyzed Gasoline Particulate Filter During Filter Regeneration

Emission Control Science and Technology, 2016

Real-time solid particle number (PN), size distributions, black carbon (BC), and particulate matt... more Real-time solid particle number (PN), size distributions, black carbon (BC), and particulate matter (PM) mass measurements were obtained from a gasoline direct injection (GDI) vehicle with and without a catalyzed gasoline particulate filter (GPF) over the US Federal Test Procedure 75 (FTP-75) and US06 Supplemental Federal Test Procedure (US06) drive cycles. The organic and elemental carbon fractions of the carbonaceous PM and transmission electron microscope (TEM) images for the exhaust particles were examined. Particles emitted from the GDI vehicle over various moderate driving conditions have similar morphology, size, and composition. These accumulation mode particles have diameters of 50 to 90 nm, have comparable fractal structures to diesel particles, and contain mostly BC with little organic materials. Under aggressive driving conditions, many nanoparticles (<20 nm in diameter) are emitted with the accumulation mode particles. Over the FTP-75 driving conditions, the optimized GPF reaches particle filtration efficiency of over 90 % from clean condition rapidly and filtration efficiency remains unchanged as filter regeneration was not observed. Over the US06 driving condition, filter regeneration was triggered by the high exhaust temperature during which many nanoparticles with diameters smaller than 30 nm are formed downstream of the GPF. TEM image analysis suggests that BC particles collected during the filter regeneration contain a layer of semi-volatile materials on the aggregate surface while the nanoparticles were semi-volatile in nature. During filter regeneration, moderate filtration of the accumulation mode BC particles was still observed.

Research paper thumbnail of Thermally Stable Support Material and Method for Making the Same

Research paper thumbnail of Ceric oxide washcoat

Research paper thumbnail of Porous ceramic beads

Research paper thumbnail of Ceric Oxide Washcoat

Research paper thumbnail of Porous ceramic beads

Research paper thumbnail of Ceric oxide washcoat

Research paper thumbnail of Application d'un catalyseur sur un substrat metallique faisant simultanement appel a un depot electrophoretique et materiau d'adhesion du catalyseur

Cette invention concerne des elements catalyseurs (7) flexibles et a feuille metallique, lesquels... more Cette invention concerne des elements catalyseurs (7) flexibles et a feuille metallique, lesquels peuvent etre utilises dans des dispositifs catalytiques servant a regler les emissions de moteurs a combustion. Ces elements sont prepares par depot electrophoretique d'une bouillie aqueuse (17) contenant le materiau dont est faite la couche de support du catalyseur, ainsi que le catalyseur proprement dit. La couche deposee (8) possede une epaisseur uniforme et une surface stable. Les elements catalyseurs (7) decrits dans la presente invention peuvent etre notamment utilises dans des applications ayant trait au domaine de l'industrie automobile, et plus particulierement dans des convertisseurs catalytiques a chauffage electrique.

Research paper thumbnail of Catalyst support material with high oxygen storage capacity and process for its manufacture

Research paper thumbnail of On-road gaseous and particulate emissions from GDI vehicles with and without gasoline particulate filters (GPFs) using portable emissions measurement systems (PEMS)

Science of The Total Environment

• Catalyzed GPFs showed significant reductions in real-world PM emissions. • Urban and high-altit... more • Catalyzed GPFs showed significant reductions in real-world PM emissions. • Urban and high-altitude driving showed elevated PM emissions. • Highest particle number concentrations were seen for low speeds and positive accelerations. • Real-world NOx emissions showed reductions with the catalyzed GPFs.

Research paper thumbnail of Solid Particle Number and Ash Emissions from Heavy-Duty Natural Gas and Diesel w/SCRF Engines

SAE Technical Paper Series

Research paper thumbnail of Catalyzed Gasoline Particulate Filters Reduce Secondary Organic Aerosol Production from Gasoline Direct Injection Vehicles

Environmental Science & Technology

The effects of photochemical aging on exhaust emissions from two light-duty vehicles with gasolin... more The effects of photochemical aging on exhaust emissions from two light-duty vehicles with gasoline direct injection (GDI) engines equipped with and without catalyzed gasoline particle filters (GPFs) were investigated using a mobile environmental chamber. Both vehicles with and without the GPFs were exercised over the LA92 drive cycle using a chassis dynamometer. Diluted exhaust emissions from the entire LA92 cycle were introduced to the mobile chamber and subsequently photochemically reacted. It was found that the addition of catalyzed GPFs will significantly reduce tailpipe particulate emissions and also provide benefits in gaseous emissions, including nonmethane hydrocarbons (NMHC). Tailpipe emissions composition showed important changes with the use of GPFs by practically eliminating black carbon and increasing the fractional contribution of organic mass. Production of secondary organic aerosol (SOA) was reduced with GPF addition, but was also dependent on engine design which determined the amount of SOA precursors at the tailpipe. Our findings indicate that SOA production from GDI vehicles will be reduced with the application of catalyzed GPFs through the mitigation of reactive hydrocarbon precursors.

Research paper thumbnail of Gasoline Particulate Filters as an Effective Tool to Reduce Particulate and PAH Emissions from GDI Vehicles: A Case Study with Two GDI Vehicles

Environmental science & technology, Jan 15, 2018

We assessed the gaseous, particulate, and genotoxic pollutants from two current technology gasoli... more We assessed the gaseous, particulate, and genotoxic pollutants from two current technology gasoline direct injection vehicles when tested in their original configuration and with a catalyzed gasoline particulate filter (GPF). Testing was conducted over the LA92 and US06 Supplemental Federal Test Procedure (US06) driving cycles on typical California E10 fuel. The use of a GPF did not show any fuel economy and carbon dioxide (CO2) emission penalties, while the emissions of total hydrocarbons (THC), carbon monoxide (CO), and nitrogen oxides (NOx) were generally reduced. Our results showed dramatic reductions in particulate matter (PM) mass, black carbon, and total and solid particle number emissions with the use of GPFs for both vehicles over the LA92 and US06 cycles. Particle size distributions were primarily bimodal in nature, with accumulation mode particles dominating the distribution profile and their concentrations being higher during the cold-start period of the cycle. Polycycli...

Research paper thumbnail of Assessment of the Fuel Composition Impact on Black Carbon Mass, Particle Number Size Distributions, Solid Particle Number, Organic Materials, and Regulated Gaseous Emissions from a Light-Duty Gasoline Direct Injection Truck and Passenger Car

Research paper thumbnail of Sulfur Tolerant Alumina Catalyst Support

The present invention relates to a process for the preparation of my redundancy alumina, the meth... more The present invention relates to a process for the preparation of my redundancy alumina, the method, in the aqueous medium, the charged opposite preparing an aluminum hydrate (each of the salt of aluminum cation or aluminum anions, and the other hand from one or more water-soluble aluminum salt including an ion), contacting the aluminum hydrate, in said aqueous medium, and in the presence of one or more aluminum salt counterion, silica precursor, silica precursor from the aqueous medium and separating the aluminum hydrate particles contact , and the silica precursor by calcining the contacted aluminum hydrate particles, and a step of producing the particles of sulfur in the alumina.

Research paper thumbnail of Barrier for a Metal Substrate

Research paper thumbnail of Metal foil catalyst members by aqueous electrophoretic deposition

Research paper thumbnail of Method of making microcellular ceramic bodies

Research paper thumbnail of Low density glassy materials for bioremediation supports

Research paper thumbnail of Method for making sintered bodies

Research paper thumbnail of Characterization of Real-Time Particle Emissions from a Gasoline Direct Injection Vehicle Equipped with a Catalyzed Gasoline Particulate Filter During Filter Regeneration

Emission Control Science and Technology, 2016

Real-time solid particle number (PN), size distributions, black carbon (BC), and particulate matt... more Real-time solid particle number (PN), size distributions, black carbon (BC), and particulate matter (PM) mass measurements were obtained from a gasoline direct injection (GDI) vehicle with and without a catalyzed gasoline particulate filter (GPF) over the US Federal Test Procedure 75 (FTP-75) and US06 Supplemental Federal Test Procedure (US06) drive cycles. The organic and elemental carbon fractions of the carbonaceous PM and transmission electron microscope (TEM) images for the exhaust particles were examined. Particles emitted from the GDI vehicle over various moderate driving conditions have similar morphology, size, and composition. These accumulation mode particles have diameters of 50 to 90 nm, have comparable fractal structures to diesel particles, and contain mostly BC with little organic materials. Under aggressive driving conditions, many nanoparticles (<20 nm in diameter) are emitted with the accumulation mode particles. Over the FTP-75 driving conditions, the optimized GPF reaches particle filtration efficiency of over 90 % from clean condition rapidly and filtration efficiency remains unchanged as filter regeneration was not observed. Over the US06 driving condition, filter regeneration was triggered by the high exhaust temperature during which many nanoparticles with diameters smaller than 30 nm are formed downstream of the GPF. TEM image analysis suggests that BC particles collected during the filter regeneration contain a layer of semi-volatile materials on the aggregate surface while the nanoparticles were semi-volatile in nature. During filter regeneration, moderate filtration of the accumulation mode BC particles was still observed.

Research paper thumbnail of Thermally Stable Support Material and Method for Making the Same

Research paper thumbnail of Ceric oxide washcoat

Research paper thumbnail of Porous ceramic beads