Abstract:
Thermal shock resistant catalytic monolithic structures are described comprising split-cylinders with flow-through passages. Such structures are especially useful as combustor catalysts and their use in catalytic combustors permits much more rapid start-up and cool down than with conventional monolithic catalysts.
Abstract:
A method is disclosed for coating non-porous or low porosity ceramic surfaces with a catalytically active film comprising a platinum group metal and a minor amount of a refractory metal oxide. The method comprises applying a thermally decomposable compound of a precious metal and a compound decomposable into a refractory metal oxide to a ceramic surface and decomposiing said compounds in the presence of air.
Abstract:
A method and apparatus for operating a gas turbine system are disclosed utilizing an adiabatic combustion process, employing combustion of a pre-mixed carbonaceous fuel-air admixture in a combustion zone. The combustion and the combustion zone are maintained at an approximately constant temperature by selective control of the fuel-to-air ratio over a period of turbine operation during which the fuel demand or the combustion air temperature varies. Such control of the combustion zone temperature is such that said constant temperature is substantially above the instantaneous auto-ignition temperature of the fuel-air admixture. The resulting effluent is characterized by high thermal energy useful for generating power and may be low in atmospheric pollutants, including oxides of nitrogen.
Abstract:
Carbonaceous fuel is thermally combusted with an amount of air substantially less than that needed for complete combustion to carbon dioxide and water of all the combustible components in the fuel to produce a gaseous first effluent containing a substantial proportion of carbon monoxide but little or no nitrogen oxides. The first effluent is mixed with additional air and at least a portion of the resulting mixture is passed into the presence of a solid oxidation catalyst for combustion at a temperature above the instantaneous auto-ignition temperature of the mixture but below nitrogen-oxide-forming temperatures. Heat is withdrawn from the initial thermal combustion stage and from the gases downstream of the catalyst for the purpose for which the furnace is being operated.
Abstract:
A novel catalytic reactor is provided for controlling the contact of a limiting reactant with a catalyst surface. A first flow vessel defines an interior surface and an exterior surface, and the interior surface has a catalyst deposited on at least a portion thereof. A second flow vessel is positioned within the first flow vessel and the second flow vessel defines a porous surface designed to deliver a fluid uniformly to at least a portion of the interior surface of the first flow vessel.
Abstract:
A novel method is provided for in situ combustion and recovery of oil from underground reservoirs including injecting oxygen into the reservoir at a region near the reservoir floor, establishing a combustion front wherein hot combustion gases rise at the combustion front, withdrawing hot combustion gases from a region near the reservoir ceiling, and extracting oil from a horizontal production well near the reservoir floor.
Abstract:
A method of lowered NOx combustion is taught wherein the kinetic rate of NOx formation is reduced for a given combustion temperature in a gas turbine combustor. A supply of fuel is provided along with a supply of ambient air in sufficient quantity to form a fuel/air mixture having an equivalence ratio greater than about 0.55 when mixed with the fuel. The fuel/air mixture is mixed with a supply of cooled combustion gases in sufficient quantity such that the oxygen content of the resulting air mixture is less than about 18 percent. The resulting air mixture is then passed into the combustor.
Abstract:
A method of producing natural gas fuel from gas hydrate beds is provided wherein a gas turbine engine is operated thereby producing power and hot exhaust. A portion of the heat from the hot exhaust is transferred to water and the heated water is passed downhole and brought into thermal contact with a hydrate bed thereby dissociating hydrate and producing hydrate gas. Sufficient fuel is then passed to the engine for operation.
Abstract:
A streamlined flow mixer is provided that includes a housing and a plurality of tubes having an upstream end and a downstream end. The tubes are flared at the downstream end. The mixer includes a header plate and the upstream end of each tube passes through the header plate in such as fashion as to be sealed therein. The housing may extend further downstream than the tubes and proved a mixing region. A second header plate may be added to provide for mixing more than two fluids.
Abstract:
A method for isobutane alkylation is provided using a fixed-bed catalytic alkylation reactor comprises at least one catalytic flow channel. A feed stream comprising a compound to be alkylated is passed into a flow channel having an alkylation catalyst positioned on at least a portion of the flow channel inner surface in the flow channel downstream region. Olefin is injected into the feed stream at a point beyond a flow channel entrance region whereby the olefin contacts the alkylation catalyst by diffusion to the flow channel inner surface thereby reacting the compound with the olefin and produces an alkylate product.