Patent
Process for treating automotive exhaust
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TLDR
In this article, a CATALYST COMBINATION HAVING BOTH OXIDATION and REDUCTION CAPABILITY is used in a first converter, the CATALyst having a RUTHENIUM CONTAINING SECTION FOLLOWED by a SECTION CONTAINing an E.G., RHODIUM.Abstract:
FOR USE IN THE TREATMENT OF AUTOMIBILE EXHAUST GASES, A CATALYST COMBINATION HAVING BOTH OXIDATION AND REDUCTION CAPABILITY IS EMPLOYED IN A FIRST CONVERTER, THE CATALYST HAVING A RUTHENIUM CONTAINING SECTION FOLLOWED BY A SECTION CONTAINING ANOTHER NOBLE METAL, E.G., RHODIUM. NITROGEN OXIDES ARE REMOVED WITH LITTLE PRODUCTION OF AMMONIA.read more
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Patent
Process and apparatus
Carl D Keith,John J Mooney +1 more
TL;DR: In this paper, an initial honeycomb-type catalyst is used to purify exhaust gases from an internal combustion engine and an excess of extraneous fuel is fed to the initial catalyst to reduce nitrogen oxides to nitrogen.
Patent
Method for using a regenerable catalyzed trap
TL;DR: In this article, a method of removing a sorbable component such as SOx from a lean gaseous stream through a trap member having an oxidation catalyst combined with a sorbent material at a temperature within the sorbing temperature range of the SOx.
Patent
Catalyst for purifying automotive exhaust gases
TL;DR: In this article, a catalyst for use in the control of atmospheric pollution and in particular to the purification of exhaust gases from internal combustion engines was proposed, where the catalysts were defined as ruthenium or an alloy thereof and a metal oxide capable of forming a stable mixed oxide (or "ruthenite") with ruthensium dioxide.
Patent
Catalytic trap with potassium component and method of using the same
TL;DR: In this article, a method of treating a NO x -containing gas stream involves maintaining the gas stream in alternating periods of ( 1 ) lean and ( 2 ) rich or stoichiometric conditions and contacting with the catalytic trap under conditions in which NO x is adsorbed during lean operation and released and reduced to nitrogen during rich operation.
Patent
METHOD AND APPARATUS FOR NOx ABATEMENT IN LEAN GASEOUS STREAMS
TL;DR: In this paper, a method for reduction of NOx in a lean gaseous stream is described, which involves passing the stream at a temperature within the NOx sorbing temperature range through a catalyzed trap member having an oxidation catalyst intimately combined with a sorbent material.