Engelhard Corporation

Exxon Research and Engineering Company

Other

Gary Wayne Rice

Kenneth Edwin Voss

Stuart Leon Soled

Rocco A Fiato

Joseph Allan Patchett

Michael G Norris

John Lawrence Calabrese

Timothy D Wildman

Karl Richard Grimston

Rudolfus Petrus Verbeek

Sabato Miseo

Anthony J Rotolico

Arthur J Fabel

Gerald L Kutner

Mathijs Van Genderen

Joseph Charles Dettling

Stanley Allen Roth

Bulent O Yavuz

Matthew P Larkin

Yiu Kwan Lui

Ramesh M Kakwani

Alexander Gorel

Mathus Van Genderen

A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.

Control system for mobile NOx SCR applications

The present invention relates to a method and article for treating a diesel engine exhaust stream. The stream is contacted with an upstream catalytic composition having a cerium component and/or a zeolite component to reduce the quantity and amount of the particulate matter in the exhaust stream. The stream passes from the upstream catalytic composition to a particulate filter located downstream from the upstream catalytic composition.

Diesel oxidation catalyst

Methods and apparatus for reducing the TPM level of a diesel engine exhaust stream by providing a suitable oxidation catalyst into the exhaust train. The oxidation catalyst may be incorporated into a thermal insulative coating on the inner surface of the exhaust train, particularly the exhaust manifold and exhaust pipes prior to the turbocharger. Alternatively, when the exhaust train includes a turbocharger, the catalyst can be in a separate monolithic unit between the engine and the turbocharger. The system may also include an improved diesel oxidation catalyst unit having a metal monolithic substrate. The oxidation catalyst can also be incorporated into a thermal insulative coating inside the cylinders, particularly on non-rubbing surfaces such as The invention also includes the use of a protective mullite top coat on the thermal coating. A further embodiment is the use of a stainless steel bond coat to bind the thermal coating to a metallic substrate, particularly an aluminum substrate.

System for reduction of harmful exhaust emissions from diesel engines

Methods and apparatus for reducing the TPM level of a diesel engine exhaust stream by providing a suitable oxidation catalyst into the exhaust train. The oxidation catalyst may be incorporated into a thermal insulative coating on the inner surface of the exhaust train, particularly the exhaust manifold and exhaust pipes prior to the turbocharger. Alternatively, when the exhaust train includes a turbocharger, the catalyst can be in a separate monolithic unit between the engine and the turbocharger. The system may also include an improved diesel oxidation catalyst unit having a metal monolithic substrate.

Particles of an interconnected three-dimensional network of bar-like topaz crystals are used as a reactant (with added silicon dioxide, or a mixture with added silicon dioxide and hydrated aluminum fluoride or added silicon dioxide, hydrated aluminum fluoride and alumina) to form mullite whisker honeycomb articles suitable as catalyst supports.

Thermal shock and creep resistant porous mullite articles prepared from

This invention relates to a process for producing C.sub.2 -C.sub.20 olefins from a feed stream consisting of H.sub.2 and CO.sub.2 using an iron-carbide based catalyst.

Method for producing olefins from H.sub.2 and CO.sub.2 using an iron

This invention relates to a promoted finely divided or supported iron carbide-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser and the use of such a catalyst to produce various heavier hydrocarbons from CO and H.sub.2.

Method for the production of hydrocarbons using iron-carbon-based

This invention relates to a finely divided iron carbide-first row transition metal-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser. The catalysts may be used to produce various hydrocarbons, including olefins, from CO.sub.2 and H.sub.2.

Laser produced iron carbide-based catalysts

This invention relates to a finely divided iron carbide-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser. The catalysts may be used to produce various hydrocarbons, including olefins, from CO and H.sub.2.

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Scotch Plains, NJ, United States of America

Gary Wayne Rice