摘要:
A metal-free detergent and antioxidant additive comprising the reaction product of an acidic organic compound, a boron compound, a polyamine such as polyethylene imine, and optionally an alkoxylated amine and/or an alkoxylated amide, is provided. The additives of the present invention have higher TBN than similar compounds known in the art.
摘要:
Described are catalyst compositions and methods for their preparation and use. Certain catalyst compositions can include at least one reduction catalyst and at least one oxidation catalyst. A catalyst composition as described herein is useful in providing certain benefits to a combustible fuel, such as, for example, reducing harmful emissions and/or improving overall fuel economy.
摘要:
An additive to a flame reaction is provided which forms noncorrosive deposits on cooler metal surfaces which are more stable than Na2SO4 or K2SO4. The additive preferentially combines with the sodium or potassium, and sulfates of these will not be formed. By adding tungsten to the flame, a complex sodium tungstate is produced on the surface of the cooler metal object in a dense form and corrosion is inhibited. Deposition appears to closely reflect the relative thermodynamic stabilities of these salts and follows the order Na2WO4>Na2SO4>NaCl>Na2CO3. The flame sulfur or chlorine do not remain on the surface in association with the alkali metal. Tungsten can be added in any form desired to the combustion system. The flame processes all chemical tungsten precursors as equivalent sources of tungsten. Suitable salts that are readily available are ammonium metatungstate, paratungstate, or tungstate, tungsten hexacarbonyl, tungsten oxides, tungstic acid or any organo-tungsten compound. The level of tungsten preferably present at an atomic concentration is equal to 1.5 to 2 times that of the sodium in the specific flame environment and possibly a little higher for potassium. The nature of the fuel and possible alkali reduction schemes will control the quantity and mixing method of the additive. The additive may be directly mixed into the fuel or injected into the burned gas regions of the combustor. Ta and Nb also appear as possible substitutes for W in the invention.
摘要:
Cold high energy fuel compositions for jet, turbine, diesel, fuel oil, and gasoline combustion systems. More particularly, relates to fuels comprised of enhanced combustion structure.
摘要:
The invention provides a method employing a fuel additive to improve the operation of a pass-through oxidation catalyst over long periods of time with continued catalytic activity and without the undesirable conversion of SO2 to SO3. A pass-through catalyst support is continuously, selectively catalyzed by the combustion of a fuel containing a platinum group metal composition which burns to release the catalyst metal in active form. The effectiveness of the process is attributed to improved combustion in the engine by the catalyst and the treatment of the catalytic oxidizer with active catalyst metal released during combustion such that, in the exhaust system, the soluble organic fraction of the particulates and the levels of gaseous unburned hydrocarbons and carbon monoxide are significantly reduced. The catalysts conditioned by the present invention cause minimal conversion of SO2 to SO3. The platinum group metal compositions soluble or dispersible in the diesel fuel and are added in amounts effective to provide concentrations of the metal in the fuel of less than 1 part per million (ppm).
摘要:
A hydrocarbonaceous fuel additive, fuel composition, and method all lower both carbon particulate emissions and improve slag properties in combustion systems including, for instance, utility furnaces and boiler systems. The mixed metal catalyst includes a transition metal-containing compound, an alkali metal compound, and a magnesium-containing compound.
摘要:
The invention relates to a liquid fuel composition comprising: 10-80 vol % of a first component comprising at least two aliphatic organic non-hydrocarbon compounds; 20-65 vol % of a second component comprising at least one hydrocarbon and having an aromatic content of less than 15 vol % of the total of the second component; 1-35 vol % of a third component, which comprises an oxygenate; and 0.01 to 20 vol % water, wherein at least one compound in the fuel composition is miscible with both water and hydrocarbons to provide a single phase composition. Such fuels have been found to reduce undesirable emissions in the exhaust gases and enable the use of recycled compounds and water in the fuel.
摘要:
A hydrocarbonaceous fuel additive, fuel composition, and method all lower both carbon particulate emissions and improve slag properties in combustion systems including, for instance, utility furnaces and boiler systems. The mixed metal catalyst includes a transition metal-containing compound, an alkali metal compound, and a magnesium-containing compound.
摘要:
A low-emissions diesel fuel comprises fungible aviation kerosene grade 55, 50-300 ppm detergent, 25-500 ppm lubricity additive and a bimetallic, fuel soluble platinum and cerium fuel borne catalyst (e.g., 0.1-2.0 ppm platinum COD and 5-20 ppm cerium oleate). The fuel can be used as is or in the form of an emulsion. A method of reducing the emissions of pollutants from a diesel engine, comprising running the engine on a fuel as defined. Retarding engine timing can further reduce NOx and the use of a diesel particulate filter and/or diesel oxidation catalyst can provide further reductions i carbon monoxide, unburned hydrocarbons and particulates.