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| Number | Title | Issue Date |
| 5743922 | Enhanced lubricity diesel fuel emulsions for reduction of nitrogen oxides An improved lubricity water and diesel fuel emulsion is presented. The emulsion is used as fuel for diesel engines, and includes a lubricity additive selected from the group consisting of dimer acids, trimer acids, phosphate esters, sulfurized castor oil,... | 04/28/1998 |
| 5740745 | Process for increasing the effectiveness of slag control chemicals for black liquor recovery and other combustion units Reduction of slagging is improved by targeting slag-reducing chemicals in a furnace with the aid of computational fluid dynamic modeling. Chemical utilization and boiler maintenance are improved.... | 04/21/1998 |
| 5728357 | Reduction of NOx emissions from rotary cement kilns by selective noncatalytic reduction The use of urea injection SNCR is enabled for rotary kilns of the type used to produce cement clinker. Rotary kilns are long cylinders that rotate about an inclined axis, with cement premix fed in at one end and a burner for heat at the other end. The geo... | 03/17/1998 |
| 5658547 | Simplified efficient process for reducing NOx, SOx, and particulates The removal of SOx and particulates, and preferably also NOx, from the combustion gases of a large boiler, is simplified while efficiency is improved. In a primary treatment zone, a slurry comprising an alkaline SOx -reduc... | 08/19/1997 |
| 5645756 | Hardness suppression in urea solutions The tendency of aqueous solutions of urea and other NH-containing compositions to force instability of hardness factors has been found to be detrimental to processes and apparatus employing them. The reliability of these processes and apparatus is improve... | 07/08/1997 |
| 5616307 | Boiler operation with decreased NOx and waste water discharge Pollution from industrial plants which produce NOx and waste water is reduced by utilizing waste water to prepare aqueous NOx -reducing solutions. Total water hardness in the waste water is preferably maintained below 2500 ppm, silic... | 04/01/1997 |
| 5543123 | Low pressure formation of a urea hydrolysate for nitrogen oxides reduction The present invention relates to a process for the use of a urea hydrolysate for nitrogen oxides reductions. More particularly, the process involves forming a urea hydrolysate under conditions of low pressure and introducing the hydrolysate into a combust... | 08/06/1996 |
| 5536482 | Process for pollution control Improved processes and improved compositions reduce the environmental damage caused by large-scale combustion, especially in the field of NOx reduction by selective noncatalytic reduction (SNCR) in the gas phase. In one aspect, the process impr... | 07/16/1996 |
| 5523069 | Carbonyl sulfide abatement in fluids A method for removing carbonyl sulfide from fluids, particularly gases, involves contacting them with alkaline aqueous solutions containing peroxide and hindered amine. The sulfur products so formed can then be separated from the fluid. In one embodiment,... | 06/04/1996 |
| 5518980 | Stabilization of calcium-based slurries for sox reduction by in-furnance injection More reliable removal of sulfur oxides (SOx) from combustion effluents by in furnace injection is achieved by stabilizing slurries of calcium carbonate (limestone), calcium oxide (lime) and calcium hydroxide (hydrated lime) for extended periods... | 05/21/1996 |
| 5489420 | Nitrogen oxides reducing agent and a phosphate Processes and compositions enable selective noncatalytic reduction (SNCR) in the gas phase at temperatures above 950° C. to reduce the environmental damage caused by NOx and related emissions. By utilizing a nitrogenous NOx -reducin... | 02/06/1996 |
| 5489419 | Process for pollution control Improved processes and improved compositions reduce the environmental damage caused by large-scale combustion, especially in the field of NOx reduction by selective noncatalytic reduction (SNCR) in the gas phase. In one aspect, the process impr... | 02/06/1996 |
| 5478542 | Process for minimizing pollutant concentrations in combustion gases Distribution of pollution reducing agents within an effluent at the effective temperature window for effective gas phase reaction is greatly improved. A two-phase mixture having fine droplets of liquid, e.g. a NOx reducing agent such as aqueous... | 12/26/1995 |
| 5468460 | Stabilization of calcium-based slurries for sox reduction by in-furnace injection More reliable removal of sulfur oxides (SOx) from combustion effluents by in furnace injection is achieved by stabilizing slurries of calcium carbonate (limestone), calcium oxide (lime) and calcium hydroxide (hydrated lime) for extended periods... | 11/21/1995 |
| 5453257 | Process for adjusting the optimum effluent temperature of a nitrogen oxides reducing treatment agent The present invention relates to a process for reducing the nitrogen oxides level in an effluent from the combustion of a carbonaceous fuel, which involves preparing an emulsion of a nitrogen oxides reducing treatment agent and a hydrocarbon having a boil... | 09/26/1995 |
| 5441713 | Hardness suppression in urea solutions The tendency of aqueous solutions of urea and other NH-containing compositions to force instability of hardness factors has been found to be detrimental to processes and apparatus employing them. The reliability of these processes and apparatus is improve... | 08/15/1995 |
| 5399325 | Nitrogen oxides reduction using a urea hydrolysate The present invention relates to a process for the use of a urea hydrolysate for nitrogen oxides reductions. More particularly, the process involves forming a urea hydrolysate and introducing the hydrolysate into a combustion effluent under conditions eff... | 03/21/1995 |
| 5344306 | Reducing nitrogen oxides emissions by dual fuel firing of a turbine The invention presented relates to a process for reducing nitrogen oxides emissions from a gas turbine. The process involves forming an emulsion of water and fuel oil and simultaneously combusting the thusly formed emulsion with natural gas in a gas turbi... | 09/06/1994 |
| 5298230 | Process for the efficient catalytic reduction of nitrogen oxides A process for the reduction of nitrogen oxides in the effluent of a gas turbine is presented. This process comprises forming an emulsion which comprises water and fuel oil and combusting the emulsion in the combustion can of a gas turbine to form an efflu... | 03/29/1994 |
| 5284492 | Enhanced lubricity fuel oil emulsions An improved lubricity water and fuel oil emulsion is presented. The emulsion is used as fuel for an electric power generating turbine, and includes a lubricity additive selected from the group consisting of dimer acids, trimer acids, phosphate esters, sul... | 02/08/1994 |
| 5277135 | Controlling concentration of chemical treatment for flue gas reduction of the oxides of nitrogen In a furnace (boiler) installation where oxides of nitrogen are to be reduced to elemental nitrogen by treatment with a reactant such as a solution of urea, the desired amount of reactant (dependent on furnace specifics) is determined by comparing the flu... | 01/11/1994 |
| 5229090 | Process for nitrogen oxides reduction to lowest achievable level A system for the reduction of nitrogen oxides in the effluent from the combustion of a carbonaceous fuel is presented. This system utilizes means for determining the lowest achievable nitrogen oxides concentration with respect to a treatment agent to be i... | 07/20/1993 |
| 5199255 | Selective gas-phase nox reduction in gas turbines Nitrogen oxides are reduced in gas turbines by selective, gas-phase reaction with urea. This is enabled in a preferred embodiment by injecting urea as an aqueous solution of droplet sizes and concentration effective to assure selective gas phase reactions... | 04/06/1993 |
| 5048432 | Process and apparatus for the thermal decomposition of nitrous oxide A process and apparatus is presented for the reduction of nitrous oxide in the effluent from the combustion of a carbonaceous fuel. The process comprises raising the temperature of the effluent to a temperature of at least about 1700° F. The apparatus ut... | 09/17/1991 |
