CATALYST FOR THE ABATEMENT OF AMMONIA AND NITROGEN OXIDE EMISSIONS FROM THE EXHAUST GASES OF COMBUSTION ENGINES

The present invention relates to a catalyst comprising a carrier substrate of the length L, which extends between a first end face ‘a’ and a second end face ‘b’, and differently composed material zones A and B arranged on the carrier substrate, wherein material zone A comprises platinum and no palladium or platinum and palladium with a weight ratio of Pt:Pd of ≥1 and, material zone B comprises a copper containing zeolite having a Cu/Al ratio of 0.355 or higher.

CATALYST FOR THE ABATEMENT OF AMMONIA FROM THE EXHAUST OF GASOLINE INTERNAL COMBUSTION ENGINES

Catalyst for the abatement of ammonia from the exhaust of gasoline internal combustion engines The present invention relates to a catalyst comprising a carrier body having a length L extending between a first end face and a second end face, and differently composed material zones A, B and C arranged on the carrier body, wherein material zone A comprises rhodium and/or nickel and/or cerium; material zone B comprises platinum; and material zone C comprises a zeolite which is able to store ammonia and to catalyze the selective catalytic reduction of NOx.

CATALYTICALLY ACTIVE PARTICLE FILTER WITH A HIGH DEGREE OF FILTERING EFFICIENCY

The present invention relates to a wall flow filter for removing particles from the exhaust gas of internal combustion engines, which comprises a wall flow filter substrate having a length L and coatings Z and F that differ from one another, wherein the wall flow filter substrate comprises channels E and A, which extend in parallel between a first and a second end of the wall flow filter substrate, are separated by porous walls and form surfaces OE or OA, and wherein the channels E are closed at the second end and the channels A are closed at the first end, and wherein the coating Z is located in the porous walls and/or on the surfaces OA, but not on the surfaces OE, and comprises palladium and/or rhodium a cerium/zirconium mixed oxide, characterized in that the coating F is located in the porous walls and/or on the surfaces OE, but not on the surfaces O, and comprises a ceramic membrane and no precious metal.

CATALYST FOR REDUCING AMMONIA EMISSIONS

The present invention relates to a catalyst comprising a carrier substrate of length L, coating A arranged as the first layer on the carrier and containing platinum on a metal oxide, and coating B applied as the second layer to coating A and containing a Cu-exchanged molecular sieve and no noble metal, wherein the total washcoat quantity of coating A is 40 g/l or more of washcoat in relation to the coated catalyst volume. 1. Catalyst comprisinga carrier substrate of length L extending between an end X and an end Y,coating A arranged as a first layer on the carrier and containing platinum on a metal oxide α and a metal oxide β that does not carry a noble metal, andcoating B applied as a second layer to coating A and containing a Cu-exchanged molecular sieve and no noble metal,wherein the total washcoat quantity of coating A is 40 g/l or more of washcoat in relation to the coated catalyst volume.2. Catalyst according to claim 1 , characterized in that the total washcoat quantity of coating A is 50 g/l or more of washcoat in relation to the coated catalyst volume.3. Catalyst according to claim 1 , characterized in that the total washcoat quantity of coating A is 75 g/l or less of washcoat in relation to the coated catalyst volume.4. Catalyst according claim 1 , characterized in that the total washcoat quantity for coating A is 40 g/l to 75 g/l claim 1 , more particularly preferably 50 g/l to 75 g/l claim 1 , in relation to the coated catalyst volume.5. Catalyst according to claim 1 , characterized in that the carrier substrate is a flowthrough substrate.6. Catalyst according to claim 1 , characterized in that metal oxide α and metal oxide β are different.7. Catalyst according to claim 1 , characterized in that metal oxide α is titanium oxide.8. Catalyst according to claim 1 , characterized in that metal oxide β is aluminum oxide.9. Catalyst according to claim 1 , characterized in that metal oxide α is titanium oxide and metal oxide R is aluminum oxide.10. Catalyst ...

CATALYTICALLY ACTIVE PARTICLE FILTER WITH A HIGH DEGREE OF FILTERING EFFICIENCY

The invention relates to a wall flow filter for removing particulate matter from the exhaust of internal combustion engines, comprising a wall flow filter substrate having a length L, and different coatings Z and F, the wall flow filter substrate being provided with channels E and A which run parallel between a first end and a second end of the wall flow filter substrate, are separated by porous walls, and form surfaces O E and O A , respectively; channels E are closed at the second end, and channels A are closed at the first end; coating Z is disposed in the porous walls and/or on surfaces O A , but not on surfaces O E , and contains palladium and/or rhodium and a cerium/zirconium mixed oxide; coating F is disposed mainly on surfaces O E , but not on surfaces O A , and comprises a membrane and no precious metal. The wall flow filter is characterized in that the mass ratio of coating Z to coating F ranges from 0.1 to 25.

FILTER FOR THE AFTERTREATMENT OF EXHAUST GASES OF INTERNAL COMBUSTION ENGINES

The present invention relates to a wall-flow filter for removing particles from the exhaust gas of an internal combustion engine, which comprises a coating F, which comprises a sintered material S, wherein material S comprises an oxide, oxide-hydroxide, carbonate, sulphate, silicate, phosphate, mixed oxide, composite oxide, molecular sieve or a mixture comprising two or more of these materials.

METHOD FOR THE PREPARATION OF METAL OXIDE HOLLOW NANOPARTICLES

The present invention concerns a method for the preparation of metal oxide hollow nanoparticles comprising the steps of: —providing an aqueous suspension of nanoparticles of an oxide of a first element having at least two oxidation states coupled with a substrate; —placing in contact the aqueous suspension with an aqueous solution of a salt of a second element having at least two oxidation states having a standard reduction potential lower than the standard reduction potential of said first transition metal to obtain hollow nanoparticles. 1. A method for the preparation of metal oxide hollow nanoparticles comprising the steps of:providing an aqueous suspension of nanoparticles of an oxide of a first element having at least two oxidation states coupled with a substrate;placing in contact said aqueous suspension with an aqueous solution of a salt of a second element having at least two oxidation states having a standard reduction potential lower than the standard reduction potential of said first transition metal to obtain said hollow nanoparticles.2. The method according to claim 1 , characterized in that said oxide of said first element having at least two oxidation states is selected from the group consisting of Mn3O4 claim 1 , MnO2 claim 1 , Co3O4 claim 1 , Fe3O4 claim 1 , PbO2 claim 1 , CeO2.3. The method according to claim 1 , characterized in that said salt of said second element having at least two oxidation states is a salt of a metal selected from the group consisting of Fe(II) claim 1 , Sn(II) claim 1 , V(III) claim 1 , Ti(III) claim 1 , Cr(II) claim 1 , Ce(III).4. The method according to claim 1 , characterized in that the difference between the standard reduction potential of said first element having at least two oxidation states and the standard reduction potential of said second element having at least two oxidation states is at least 0.15 V.5. The method according to claim 1 , characterized in that it is conducted at a temperature ranging from 20 to ...

Catalyst for the abatement of ammonia and nitrogen oxide emissions from the exhaust gases of combustion engines

The present invention relates to a catalyst comprising • a carrier substrate of the length L, which extends between a first end face 'a' and a second end face 'b', and • differently composed material zones A and B arranged on the carrier substrate, wherein - material zone A comprises platinum and no palladium or platinum and palladium with a weight ratio of Pt : Pd of ≥ 1 and, - material zone B comprises a copper containing zeolite having a Cu/AI ratio of 0.355 or higher.

DECORATIVE PAINTING PROCEDURE OF WOODEN ITEMS AND PRODUCTS SO OBTAINED

Heat exchanger

Der Wärmetauscher (100) umfaßt ein aufrechtes Gehäuse (1), in welchem ein Bündel (50) von einander parallelen Rohren (30) vorgesehen ist, die sich zwischen einem unteren Rohrboden (10) und einem oberen Rohrboden (20) erstrecken und von heißem Prozeßgas durchströmbar sind, welches an dem Einlaß (4) eintritt und an dem Auslaß (9) austritt. Die Wärme des Prozeßgases wird am Außenumfang der Rohre (30) an ein fluides Kühlmedium, z.B. Luft abgegeben, die an dem Einlaß (17) in das Gehäuse (1) eintritt und an dem Auslaß (24) wieder austritt. Die höchsten Temperaturen an den Rohren (30) finden sich im Bereich des unteren Rohrbodens, der aus diesem Grund als siedewassergekühlter Doppelrohrboden (10) ausgebildet ist.

Heat exchanger

Catalyst for reducing ammonia and nitrogen oxide emissions from combustion engine exhaust gases

catalisador para a redução de emissões de amônia e óxido de nitrogênio dos gases de escape de motores de combustão. a presente invenção se refere a um catalisador que compreende - um substrato carreador do comprimento l, que se estende entre uma primeira face de extremidade "a" e uma segunda face de extremidade "b", e - zonas de material diferentemente compostas a e b dispostas no substrato carreador, em que - a zona de material a compreende platina e nenhum paládio ou platina e paládio com uma razão de peso de pt:pd de = 1 e, - a zona de material b compreende um zeólito que contém cobre com uma razão de cu/al de 0,355 ou superior. catalyst for reducing ammonia and nitrogen oxide emissions from combustion engine exhaust gases. The present invention relates to a catalyst comprising - a carrier substrate of length l, which extends between a first end face "a" and a second end face "b", and - differently composited material zones a and b arranged in the carrier substrate, wherein - the zone of material a comprises platinum and no palladium or platinum and palladium with a weight ratio of pt:pd of = 1 and, - the zone of material b comprises a copper-containing zeolite with a ratio of cu/al of 0.355 or higher.

Abgassystem für überwiegend stöchiometrisch betriebene Verbrennungsmotoren aufweisend einen Katalysator zur Verminderung der Ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotors.

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Abgassystem für überwiegend stöchiometrisch betriebene Verbrennungsmotoren aufweisend einen Katalysator zur Verminderung der Ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotors.

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Ammoniaksperrkatalysator für stöchiometrische verbrennungsmotoren

Die vorliegende Erfindung richtet sich auf in bestimmter Art und Weise ausgestaltete Ammoniaksperrkatalysatoren, oder auch ASC-Katalysatoren („ASC" von englisch ammonia slip catalyst) oder AMOX (von „Ammoniak Oxidationskatalysator") genannt. Diese helfen, die Ammoniakemissionen im Abgas stöchiometrisch arbeitender Verbrennungsmotoren zu senken. Ebenfalls umfasst ist ein entsprechendes Abgassystem, ein Verfahren und die Verwendung der Abgaskatalysatoren für den anvisierten Zweck.

Catalytic devices for the abatement of nh3 and nox emissions from internal combustion engines

Disclosed is a catalytic device for the removal of nitrogen oxides and ammonia from the exhaust gas of lean-burn combustion engines, comprising an upstream SCR catalyst comprising a carrier substrate, and a first washcoat comprising a first SCR catalytically active composition SCRfirst and optionally at least one first binder, wherein the first washcoat is applied to the carrier substrate; and a downstream ASC catalyst comprising a carrier substrate, and a bottom layer comprising a third washcoat comprising an oxidation catalyst and optionally at least one third binder, said bottom layer being applied directly onto the carrier substrate, and a top layer comprising a second washcoat comprising a second SCR catalytically active composition SCRsecond and optionally at least one second binder and, said top layer being applied onto the bot-tom layer; wherein the upstream SCR catalyst and the downstream ASC catalyst are present on a single carrier substrate or on two different carrier substrates, and the first and the second SCR catalytically active compositions are the same or different from one another, and the optionally comprised at least one first, second and third binders are the same or different from one another, the ratio (AA) of the loadings of the first and the second SCR catalytically active compositions, given in g/L, in the first and the second washcoat is 1.2:1 to 2:1. The first and second SCR catalytically active compositions preferably comprise a molecular sieve, and the oxidation catalyst preferably comprises a platinum group metal. The catalytic device can be used for the removal of nitrogen oxides and ammonia from the exhaust gas of lean-burn combustion engines.

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Catalyst for reducing ammonia emissions

The present invention relates to a catalyst comprising a carrier substrate of length L, coating A arranged as the first layer on the carrier and containing platinum on a metal oxide, and coating B applied as the second layer to coating A and containing a Cu-exchanged molecular sieve and no noble metal, wherein the total washcoat quantity of coating A is 40 g/l or more of washcoat in relation to the coated catalyst volume.

Catalytic Devices for the Abatement of NH3 and Nox Emissions From Internal Combustion Engines

Disclosed is a catalytic device for the removal of nitrogen oxides and ammonia from the exhaust gas of lean-burn combustion engines, comprising an upstream SCR catalyst comprising a carrier substrate, and a first washcoat comprising a first SCR catalytically active composition SCRfirst and optionally at least one first binder, wherein the first washcoat is applied to the carrier substrate; and a downstream ASC catalyst comprising a carrier substrate, and a bottom layer comprising a third washcoat comprising an oxidation catalyst and optionally at least one third binder, said bottom layer being applied directly onto the carrier substrate, and a top layer comprising a second washcoat comprising a second SCR catalytically active composition SCRsecond and optionally at least one second binder and, said top layer being applied onto the bottom layer; wherein the upstream SCR catalyst and the downstream ASC catalyst are present on a single carrier substrate or on two different carrier substrates, and the first and the second SCR catalytically active compositions are the same or different from one another, and the optionally comprised at least one first, second and third binders are the same or different from one another, the ratio (AA) of the loadings of the first and the second SCR catalytically active compositions, given in g/L, in the first and the second washcoat is 1.2:1 to 2:1. The first and second SCR catalytically active compositions preferably comprise a molecular sieve, and the oxidation catalyst preferably comprises a platinum group metal. The catalytic device can be used for the removal of nitrogen oxides and ammonia from the exhaust gas of lean-burn combustion engines.

Abgassystem für überwiegend stöchiometrisch betriebene Verbrennungsmotoren aufweisend einen Katalysator zur Verminderung der Ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Procedimento di verniciatura decorativa di manufatti in legno e prodotti cosi' ottenuti.

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotors.

Abgassystem für überwiegend stöchiometrisch betriebene Verbrennungsmotoren aufweisend einen Katalysator zur Verminderung der Ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Verbinder zum abschliessen von fernmeldekabeln

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotors.

Passage barrier system

The present invention relates to a passage barrier system for controlling the passage of pedestrians. The passage barrier system comprises a barrier member rotatable by an actuator means about a vertical rotation axis of a barrier member support between a position blocking in use the passage of pedestrians and a position enabling in use said passage, a sensor means for detecting the rotation angle of the barrier member and a controller means fed by an output signal of the sensor means for controlling the actuator means. In order to provide a passage barrier system which is neither prone to electrical and magnetic interferences nor prone to wear or suffering fragility and little resistance to dirt, the sensor means comprises a capacitive rotation encoder having a rotor and stator, and the controller means comprising a memory storing a list of rotation angles to provide a precise definition of the blocking and passing positions of the barrier.

Abgassystem für überwiegend stöchiometrisch betriebene verbrennungsmotoren aufweisend einen katalysator zur verminderung der ammoniakemissionen

Vorliegende Erfindung richtet sich auf ein Abgassystem zur Verminderung der Abgase und insbesondere der Ammoniakemissionen im Abgasstrang eines überwiegend stöchiometrisch betriebenen Fremdzündungsmotor.

Kit serratura smart per ambienti a temperatura negativa

Dispositivo a valvola a funzionamento automatico per impianti antincendio di veicoli.

Dispositivo a valvola a funzionamento automatico per impianti antincendio di veicoli

Dispositivo automatico di controllo di accesso pedonale ad elevata precisione di controllo

Procedimento per la sintesi di un concime liquido a base di umato di ferro a partire da acidi umici e solfato ferroso

Method for the preparation of metal oxide hollow nanoparticles

The present invention concerns a method for the preparation of metal oxide hollow nanoparticles comprising the steps of: - providing an aqueous suspension of nanoparticles of an oxide of a first element having at least two oxidation states coupled with a substrate; - placing in contact the aqueous suspension with an aqueous solution of a salt of a second element having at least two oxidation states having a standard reduction potential lower than the standard reduction potential of said first transition metal to obtain hollow nanoparticles.

Method for the preparation of metal oxide hollow nanoparticles

The present invention concerns a method for the preparation of metal oxide hollow nanoparticles comprising the steps of: - providing an aqueous suspension of nanoparticles of an oxide of a first element having at least two oxidation states coupled with a substrate; - placing in contact the aqueous suspension with an aqueous solution of a salt of a second element having at least two oxidation states having a standard reduction potential lower than the standard reduction potential of said first transition metal to obtain hollow nanoparticles.