Asec Manufacturing

Delphi Technologies, Inc.

Asec Manufacturing General Partnership

Syntroleum Corporation

Asec Manufacturing, a General Partnership

Heinz J Robota

Karl C Kharas

Roy T Mitsche

Michael G Gatter

John Gerard Nunan

Karl C C Kharas

Jiyang Yan

Michael G Henk

Shelly Goodman

A modified catalyst support exhibiting attrition resistance and/or deaggregation resistance is provided. A catalyst composition including the modified catalyst support is also provided. A process to produce a modified catalyst support including treatment of a support slurry with a solution of monosilicic acid is provided. A process to use a catalyst including the modified catalyst support in a Fischer-Tropsch synthesis is provided.

Modified catalyst supports

A catalyzed adsorber that is effective and durable in treating exhaust gas from internal combustion engines, and in particular, for adsorbing hydrocarbons contained in engine exhaust gas during cold start, releasing these hydrocarbons when the engine exhaust gas has heated the adsorber to normal operating temperature and catalyzing the conversion of these hydrocarbons to carbon dioxide and water. The catalyzed adsorber has a catalyst overlayer with a non-catalyst overcoat loading of about 1.0 g/in or less.

High-temperature aging tolerance catalyzed adsorber system for treating internal combustion engine exhaust gas

A process for removal of carbon monoxide, hydrocarbons, and nitrogen oxides from the exhaust gas from lean-burn, diesel and other engines which produce exhaust gases containing excess oxygen is disclosed. An exhaust gas from an engine operating at an air-fuel ratio above about 18 is contacted with a multi-component catalyst having at least two catalytic components, each capable of reducing nitrogen oxides within a range of exhaust gas temperatures that is different from the range of exhaust gas temperatures within which each other component is capable of reducing nitrogen oxides. Oxidation of the remaining reducing gases is also accomplished. One example of a two catalytic component catalyst of this invention has a first component of Au supported on alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 600&deg; C. and 900&deg; C., and a second component of Pt supported on Y-zeolite, which reduces nitrogen oxides at exhaust gas temperatures below 600&deg; C.; an example of a three catalytic component catalyst of this invention has a first component of CoO supported on &ggr;-alumina, which reduces nitrogen oxides at exhaust gas temperatures above about 475&deg; C., a second component of an alloy of Pt, Rh and Co supported on BaO -stabilized &dgr;-alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 315&deg; C. and about 475&deg; C. and a third component of an alloy of Pt and Rh supported on &ggr;-alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 200&deg; C. and about 425&deg; C.

Reduction of NOx in the exhaust from leanOx internal combustion engines

A catalytic converter for treating exhaust gas from an internal combustion engine containing a catalyst characterized by having platinum or a platinum alloy dispersed predominantly on the exterior surface of molecular sieve crystals. Also provided is a catalyst for such a converter and processes for manufacture of such catalyst. In addition, methods for treating exhaust gas from an internal combustion engine to reduce the amounts of hydrocarbon, carbon monoxide and nitrogen oxides emitted to the atmosphere are included.

Process for making a catalyst with noble metal on molecular sieve

Removal of carbon monoxide, hydrocarbons, and nitrogen oxides from the exhaust gas from lean-burn, diesel and other engines which produce exhaust gases containing excess oxygen is provided by a multi-component catalyst having at least two catalytic components, each capable of reducing nitrogen oxides within a range of exhaust gas temperatures that is different from the range of exhaust gas temperatures within which each other component is capable of reducing nitrogen oxides. Oxidation of the remaining reducing gases is also accomplished. One example of a two catalytic component catalyst of this invention has a first component of Au supported on alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 600.degree. C. and 900.degree. C., and a second component of Pt supported on Y-zeolite, which reduces nitrogen oxides at exhaust gas temperatures below 600.degree. C.; an example of a three catalytic component catalyst of this invention has a first component of CoO supported on .gamma.-alumina, which reduces nitrogen oxides at exhaust gas temperatures above about 475.degree. C., a second component of an alloy of Pt, Rh and Co supported on BaO.sub.2 -stabilized .delta.-alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 315.degree. C. and about 475.degree. C. and a third component of an alloy of Pt and Rh supported on .alpha.-alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 200.degree. C. and about 425.degree. C. A method of selecting such catalysts is also provided.

Reduction of NO.sub.x in the exhaust gases from internal combustion

Removal of carbon monoxide, hydrocarbons, and nitrogen oxides from the exhaust gas from lean-burn, diesel and other engines which produce exhaust gases containing oxygen in substantial excess of stoichiometric is provided by catalysts containing platinum alloyed with cobalt, nickel, copper, rhodium, palladium, silver or gold. Alloying is accomplished by thermal treatment or by colloidal methods. The catalysts are capable of reducing nitrogen oxides (NO.sub.x) within a predetermined range of engine operating temperatures.

Alloyed metal catalysts for the reduction of NO.sub.x in the exhaust

Methods of making substantially phase-pure and thermally stable crystalline alumina compositions stabilized with an oxide of silicon, germanium, phosphorus, arsenic or a mixture thereof. Also provided are crystalline alumina compositions and catalyst supports made using these methods.

Methods of making stabilized crystalline alumina compositions, and

A catalytic converter for treating exhaust gas from an internal combustion engine containing a catalyst characterized by having platinum or a platinum alloy dispersed predominately on the exterior surface of molecular sieve crystals. Also provided is a catalyst for such a converter and processes for manufacture of such catalyst. In addition, a process for treating exhaust gas from an internal combustion engine to reduce the amounts of hydrocarbon, carbon monoxide and nitrogen oxides emitted to the atmosphere is included.

Catalytic converter having a catalyst with noble metal on molecular

New thermally- and hydrothermally-stable .delta.-alumina compositions stabilized with an oxide of silicon, germanium, phosphorus, arsenic or a mixture thereof and methods of preparation of same are provided. Also provided are catalyst supports and catalysts made using these stabilized .delta.-alumina compositions, methods for making same, and methods for treating the exhaust gas from an internal combustion engine using such catalysts.

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Tulsa, OK, United States of America

Heinz J Robota