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| Number | Title | Issue Date |
| 7678354 | Integrated lime kiln process A process and system for recovering waste heat from a kiln used for lime or cement production. The system unifies the kiln, a waste heat recovery and power generation circuit and a dry scrubber for scrubbing the pollutants from the kiln offgas. Essentially, the syst... | 03/16/2010 |
| 7435400 | Optimizing post-combustion nitrogen oxide and sulfur dioxide reductions and improving combustion efficiency in coal fired boilers A method for increasing the nitrogen oxide emissions by either removing or modifying fuel rich nitrogen oxide (NOx) reduction processes thereby improving combustion efficiencies especially with low volatile low sulfur coals, and remove unburned carbon, re... | 10/14/2008 |
| 7427385 | Systems and processes for reducing the sulfur content of hydrocarbon streams Systems and processes for removing a first sulfur compound from a hydrocarbon stream. The systems and process utilize at least one reaction vessel incorporating a hydrolysis catalyst suitable for hydrolyzing the first sulfur compound to a second sulfur compound. The... | 09/23/2008 |
| 7404940 | Method for flue-gas reduction of pollutants in combustion processes Systems and methods for reduction of pollutants in combustion processes using combined rotating opposed fired air (ROFA) and fuel injection sorbents (FSI) for increased chemical reactivity. ... | 07/29/2008 |
| 7384615 | Method oil shale pollutant sorption/NOreburning multi-pollutant control A method of decreasing pollutants produced in a combustion process. The method comprises combusting coal in a combustion chamber to produce at least one pollutant selected from the group consisting of a nitrogen-containing pollutant, sulfuric acid, sulfur trioxide, ... | 06/10/2008 |
| 7374737 | Use of a tiOcomposition as catalyst for hydrolyzing COS and/or HCN The invention concerns the use of a composition based on TiO2 as a catalyst for hydrolyzing COS and/or HCN in a gas mixture, said composition comprising at least 1% by weight of at least one sulphate of an alkaline-earth metal selected from calcium, bariu... | 05/20/2008 |
| 7361319 | Mixed metal oxide sorbents The present invention is directed to methods for reducing SOx, NOx, and CO emissions from a fluid stream comprising contacting said fluid stream with a compound comprising magnesium and aluminum and having an X-ray diffraction pattern displaying at least a reflectio... | 04/22/2008 |
| 7357905 | Process for eliminating sulfur-containing compounds by direct oxidation The invention relates to a process for direct oxidation into sulfur and/or into sulfate of sulfur-containing compounds that are contained in an amount that is less than 10% by volume in a gas, in which said gas is brought into contact with an oxidation catalyst that... | 04/15/2008 |
| 7351382 | Particle filter having a catalytically active coating to accelerate burning off accumulated soot particles during a regeneration phase The present invention is directed to a particle filter to remove soot from the exhaust gas of a diesel engine. The particle filter contains a catalytically active coating on a filter body to accelerate bum-off during a regeneration phase of the soot particles collec... | 04/01/2008 |
| 7332143 | Targeted duct injection for SOcontrol NOx and SO3 emissions from combustion of a sulfur containing carbonaceous fuel are reduced simultaneously. The combustion gases comprising NOx and SO2 are mixed with a NOx control agent into the combustion gases... | 02/19/2008 |
| 7276217 | Reduction of coal-fired combustion emissions A process for mitigation of fouling deposits within a combustion zone, capturing of toxic metal emissions, and reduction of visible sulfur emissions attributable to sulfuric acid mist during coal combustion. SO3 formed during coal combustion is reduced by... | 10/02/2007 |
| 7273015 | Method and apparatus for combustion of residual carbon in fly ash A system for combustion and removal of residual carbon within fly ash particles in which the fly ash particles are fed into an array of process units for combustion. The fly ash particles are subjected to heat and motive air such that as the fly ash particles pass t... | 09/25/2007 |
| 7252011 | Surface area deposition trap The disclosed pressure transducer assembly includes a housing, a pressure sensor disposed within the housing, a coupling establishing a sealed pathway between the housing and an external source of gas or fluid, and a deposition trap disposed in the pathway. The depo... | 08/07/2007 |
| 7247285 | Reduction of sulfur, nitrogen oxides and volatile trace metals from combustion in furnaces and boilers A method for reducing the cost of emission control by utilizing a combination of low cost, combustion and post-combustion processes to eliminate emissions of sulfur and nitrogen oxides, and trace metals, including mercury, and trace dioxins and furans. These process... | 07/24/2007 |
| 7199078 | Vehicle sulfur oxide trap and related method An automobile exhaust system includes a catalytic converter and a modified NOx trap wit improved sulfur tolerance. Sulfur oxide has a deleterious effect on the performance of nitrogen oxide traps. In the modified NOx trap, a sulfur oxide trap is integrated with a ni... | 04/03/2007 |
| 7179438 | Methods and apparatus for recovering gypsum and magnesium hydroxide The present invention provides methods and apparatus for treating flue gas containing sulfur dioxide using a scrubber, and more particularly relates to recovering gypsum and magnesium hydroxide products from the scrubber blowdown. The gypsum and magnesium hydroxide ... | 02/20/2007 |
| 7141093 | Hydrated lime kiln dust recirculation method for gas scrubbing A method of scrubbing a gas stream with re-circulated kiln dust when the kiln dust is hydrated to form a sorbent. The sorbent is re-circulated with un-reacted flue gas stream for scrubbing. ... | 11/28/2006 |
| 7097392 | Free-flowing sulfur transport, storage and use to produce energy, fertilizer or hydrogen without carbon dioxide Elemental sulfur is combined with either liquid anhydrous ammonia, liquid sulfur dioxide, or both to form a solution or slurry which is transportable through pipelines or other transport vessels without a risk of clogging due to the environmental temperature drops t... | 08/29/2006 |
| 7048779 | Method of removing mercury from exhaust gases of coal fired power plants and associated apparatus A method of removing mercury from a coal fired power plant exhaust gas includes passing the exhaust gas through a bulk particle filter to remove coarse particles, introducing powdered activated carbon into the exhaust gas downstream of the bulk particle filter, intr... | 05/23/2006 |
| 7047894 | Method and apparatus for combustion of residual carbon in fly ash A system for combustion and removal of residual carbon within fly ash particles in which the fly ash particles are fed into an array of process units for combustion. The fly ash particles are subjected to heat and motive air such that as the fly ash particles pass t... | 05/23/2006 |
| 7021049 | Vehicle sulfur oxide trap and related method An automobile exhaust system includes a catalytic converter, a NOx trap, and a sulfur oxide trap. The sulfur oxide trap improves the efficiency of the NOx trap. Sulfur oxide has a deleterious effect on the performance of nitrogen oxide traps. The sulfur oxide trap c... | 04/04/2006 |
| 7022296 | Method for treating flue gas A multiple-field precipitator, flue-gas treating device, in accordance with the principles of the invention, includes a first section having a dual-function, sensible-cooling heat exchanger/electrostatic precipitator, a second section having a wet electrostatic prec... | 04/04/2006 |
| 7001573 | Process for removing fine dust from a fluidized-bed reactor, in particular for the oxychlorination of ethylene By a process for removing fine dust from a fluidized-bed reactor, in particular for the oxychlorination of ethylene, is intended to permit specific control of the amount of fine dust particles in a reactor while reducing the height of the reactor and the same time f... | 02/21/2006 |
| 6997119 | Combustion emissions control and utilization of byproducts A process for controlling both fireside ash deposits and corrosion, and fouling, corrosion, and emissions due to SO3 formation within a fossil-fuel-fired combustion system, such as a furnace forming part of an electrical power generating plant. A solution... | 02/14/2006 |
| 6960548 | Method for regenerating used absorbents derived from treatment of thermal generator fumes Process and device for regeneration of a used absorbent from a desulfurization zone or from the desulfurization of a gas containing sulfur oxides, comprising regeneration simultaneously with filtering of the absorbent, in a reducing atmosphere, wherein partial combu... | 11/01/2005 |
| 6946102 | Apparatus for the remediation of particulate material and toxic pollutants in transit in flue gas The invention is in an apparatus for the remediation of particulate material and gaseous pollutants from a flue gas flow that is simple and highly efficient in removing nearly all toxic pollutants, particularly sulfur dioxide, from a flue gas flow, and includes a ma... | 09/20/2005 |
| 6912962 | Apparatus for the cleaning of flue gases containing sulfur dioxide An apparatus for the cleaning of flue gases containing ash and sulfur dioxide produced by burning sulfur-containing coal in the combustion chamber of a circulating fluidized-bed firing system includes a system for delivering a particulate SO2 sorbent into... | 07/05/2005 |
| 6902714 | Method for reducing the SO2 emission from a plant for manufacturing cement clinker and such plant Provided is a method and plant for reducing SO2 emissions in which a catalyst for catalyzing the formation of cement clinker is extracted from kiln exhaust gas and recycled. ... | 06/07/2005 |
| 6817304 | Process for generating heat to reduce the emission of oxides of sulphur and reduce adsorbent consumption For reducing emissions of oxides of sulphur: a) a sulphur-containing fuel is burned in a combustion zone comprising a heat exchange zone in which at least a portion of the heat is extracted, and effluents or combustion fumes are recovered at a temperatu... | 11/16/2004 |
| 6790422 | Catalytic treatment of gaseous effluents containing varying amounts of sulfur compounds Active alumina catalysts, well suited for the Claus reaction, for the hydrolysis of organosulfur compounds and for catalytically removing objectionable sulfur compounds from gaseous effluents comprised thereof, contain a cocatalytically effective amount of sodium va... | 09/14/2004 |
| 6749820 | Chloride/sulfate removal system The liquid cooling spray in a gas conditioning chamber is modified by the addition of an alkali to scrub sulfuir dioxide and other acid forming gases and a separation unit to remove particles that may contain either unreacted alkali or salts of the acid forming gase... | 06/15/2004 |
| 6743405 | Low temperature sorbents for removal of sulfur compounds from fluid feed streams A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200° C. Sulfur absorption capacity as high as 22 weight percent h... | 06/01/2004 |
| 6737031 | Method of simultaneously reducing CO2 and SO2 emissions in a combustion installation The method of simultaneously reducing carbon dioxide (CO2) emissions and sulfur dioxide (SO2) emissions produced by the combustion of carbon-containing matter in a hearth consists in injecting into the hearth a calcium-based agent, a fraction o... | 05/18/2004 |
| 6722295 | Method for the combined reduction of nitrogen oxide and sulfur dioxide concentrations in the furnace region of boilers A method for the combined reduction of sulfur dioxide, SO2, and nitrogen oxides, NOx, in the gas stream of a furnace from the combustion of fossil fuels is disclosed. In a narrow gas temperature zone in a furnace, NOx is converted to... | 04/20/2004 |
| 6699448 | SOx tolerant NOx trap catalysts and methods of making and using the same The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with impro... | 03/02/2004 |
| 6684627 | Method of purifying exhaust gas from internal combustion engine The present invention is a method of solidifying sulfur component being the cause of "SOx poisoning" by use of a sulfur solidifier. The solidifier includes a metal element having a function of oxidizing the sulfur component and a basic metal element. And ... | 02/03/2004 |
| 6685902 | Procedure and apparatus for the cleaning of flue gases containing sulfur dioxide A process for cleaning flue gases containing ash and sulfur dioxide produced by burning sulfur-containing coal in the combustion chamber of a circulating fluidized-bed firing system includes delivering a particulate SO2 sorbent into the combust... | 02/03/2004 |
| 6610264 | Process and system for desulfurizing a gas stream A process and system is disclosed for removing sulfur from tail-gas emitted from a Claus sulfur recovery process. First, the tail-gas is oxidized so as to convert sulfur therein to sulfur oxides. Oxidized tail-gas is directed into an absorber where a soli... | 08/26/2003 |
| 6607704 | Sulfur tolerant lean NOx trap An integrated lean NOx trap. The integrated lean NOx trap includes a lean NOx trap containing a composite metal oxide mixture consisting essentially of about 80-100 wt % stoichiometric spinel MgAl2 O4... | 08/19/2003 |
| 6588205 | Exhaust gas purifying apparatus An exhaust gas purifying apparatus is provided which includes a three way catalyst provided in an exhaust pipe of an internal combustion engine; and a NOx adsorption/reduction catalyst provided in the exhaust pipe to be located downstream of the three way... | 07/08/2003 |
