Abstract: The present invention provides a Fischer-Tropsch catalyst comprising greater than about 40% by weight of cobalt, and having a packed apparent bulk density greater than about 1.30 g/mL.

Abstract: The present invention provides a Fischer-Tropsch catalyst comprising greater than about 40% by weight of cobalt, and having a packed apparent bulk density greater than about 1.30 g/mL.

Abstract: Spent catalyst (500) is removed from process microchannels (310) of a Fischer-Tropsch reactor by directing a jet of air (4) from an air knife (1) through slots of a protecting member (2). The air knife is traversed across successive rows of process microchannels (310) in direction A. The spacer member (2) protects an internal microchannel architecture (315) of the process microchannels against damage by the air jet (4) which may approach or exceed sonic velocity as it is directed into the process microchannels.

Abstract: A catalyst is regenerated by an inventive process using a heat exchange fluid such as superheated steam to remove heat during the process relying on efficient heat transfer (e.g., enabled by the microchannel reactor construction) in comparison with prior art heat exchange relying on a phase change, e.g. between water and (partial or complete vaporization) steam, allows simplification of the protocols to enable transition at higher temperatures between steps which translates in reduced duration of the regeneration process and avoids potential water hammering risks.

Abstract: The present invention provides a Fischer-Tropsch catalyst comprising greater than about 40% by weight of cobalt, and having a packed apparent bulk density greater than about 1.30 g/mL.

Abstract: Catalyst compositions, methods of making catalysts, and methods of conducting Fischer-Tropsch (FT) reactions are described. It has been discovered that a combination of large crystallite size and high porosity results in catalysts and FT catalyst systems with high stability and low methane selectivity.

Abstract: Catalyst compositions, methods of making catalysts, and methods of conducting Fischer-Tropsch (FT) reactions are described. It has been discovered that a combination of large crystallite size and high porosity results in catalysts and FT catalyst systems with high stability and low methane selectivity.

Abstract: Fuel compositions containing an isomerized component of a single carbon number may contain at least 97 wt. %, based on the total weight of the fuel composition, of an isomerized component consisting of aliphatic paraffin isomers all having the formula CnH2n+2, where 10?n?22 and n has the same value for each aliphatic paraffin isomer in the isomerized component. The fuel compositions have a normal alkane content of less than 10 wt. %, based on the total weight of the fuel composition. Methods for preparing the fuel compositions include hydroisomerizing a normal alkane starting material to form an isomerized mixture and subsequently removing remnant normal alkanes from the isomerized mixture by solvent dewaxing and/or distillation. Some of the fuel compositions may have freezing points at or below ?47° C., making them amenable for use a surrogate fuels in the place of JP-8.

Abstract: Fuel compositions containing an isomerized component of a single carbon number may contain at least 97 wt. %, based on the total weight of the fuel composition, of an isomerized component consisting of aliphatic paraffin isomers all having the formula CnH2n+2, where 10?n?22 and n has the same value for each aliphatic paraffin isomer in the isomerized component. The fuel compositions have a normal alkane content of less than 10 wt. %, based on the total weight of the fuel composition. Methods for preparing the fuel compositions include hydroisomerizing a normal alkane starting material to form an isomerized mixture and subsequently removing remnant normal alkanes from the isomerized mixture by solvent dewaxing and/or distillation. Some of the fuel compositions may have freezing points at or below ?47° C., making them amenable for use a surrogate fuels in the place of JP-8.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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/in3 or less.

Abstract: 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/in3 or less.

Abstract: 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° C. and 900° C., and a second component of Pt supported on Y-zeolite, which reduces nitrogen oxides at exhaust gas temperatures below 600° C.

Abstract: A catalytic converter for treating exhaust gas from an internal combustion engine containing a catalyst characterized by having platinum or a platinum alloy dispersed on alumina particles and 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.