Patent application number | Description | Published |
20090057202 | METHODS AND SYSTEMS FOR REMOVING VANADIUM FROM LOW-GRADE FUELS - A method for treating fuel containing vanadium including extracting vanadium from the fuel with an adsorption material and fractionating the fuel into a light oil fraction and a heavy fuel fraction. The light fuel fraction has a reduced amount of vanadium. Systems for fuel preparation are also provided. | 03-05-2009 |
20090064581 | PLASMA-ASSISTED WASTE GASIFICATION SYSTEM - A plasma-assisted waste gasification system and process for converting waste stream reaction residues into a clean synthesis gas (syngas) is disclosed. The feedstock is fed into a reactor roughly one-third from the bottom through the use of a feed mechanism. The reactor has three zones; a bottom zone where melting occurs, a middle zone where gasification takes place, and a top zone with integrated plasma torches to control the temperature and polish the syngas. The residence times in the three zones are selected to optimize the syngas composition and melted products. The syngas leaves the reactor and is partially quenched with relatively cooler synthesis gas. The partially quenched syngas is further cooled to recover heat for steam generation and/or preheating the waste stream to the reactor. The cold syngas is then processed to remove pollutants. The clean synthesis gas is combusted in power generation equipment to generate electricity, or converted to other fuels by chemical processes. | 03-12-2009 |
20090158663 | METHOD OF BIOMASS GASIFICATION - A method for the gasification of biomass, wherein the biomass feedstock is combined with a light hydrocarbon composition to form a slurry; followed by feeding the slurry to a gasifier to produce a fuel gas. In another embodiment, a method for the gasification of biomass is described. The method includes the steps of combining a biomass feedstock with water to form a slurry; feeding the slurry to a gasifier to produce a fuel gas; and injecting a light hydrocarbon into the gasifier, to generate gasification temperatures greater than about 900° C., by partial or complete combustion of the light hydrocarbon. In some other embodiments, the biomass gasifier product gas is coupled to a reformer, wherein a light hydrocarbon is injected to generate high temperatures. | 06-25-2009 |
20090259082 | INTEGRATED SYSTEM AND METHOD FOR PRODUCING FUEL COMPOSITION FROM BIOMASS - A method of producing a fuel composition from a bio-oil feedstock is provided, wherein the bio-oil feedstock is subjected to a step of oil extraction to produce a bio-oil and deoiled residue. At least a portion of the deoiled residue is gasified to produce a hydrogen-containing gas. The bio-oil is subjected to an upgrading process to ultimately produce a fuel composition. At least a part of the hydrogen-containing gas produced in the gasification of deoiled residue is used in the upgrading process of producing a fuel composition. The upgrading process, which can involve hydro-treating, hydroisomerization and at least one separation step, produces light hydrocarbons in addition to the product fuel composition. The light hydrocarbons can be used in the gasification operation, e.g., to reduce tar formation. | 10-15-2009 |
20100132633 | BIOMASS GASIFICATION REACTOR - In one aspect, the present invention provides a biomass gasifier comprising a reactor. The reactor includes (i) an inlet for biomass, (ii) an inlet for an oxygen-containing gas, (iii) an inlet for steam, (iv) an outlet for reactor product gas, (v) an outlet for ash, (vi) a biogas exit conduit coupled to the outlet for the reactor product gas and (vii) an inlet for a secondary oxygen source. The biogas exit conduit includes a catalytic partial oxidation unit, the catalytic partial oxidation unit is substantially restricting the biogas exit conduit. A system and method for biomass gasification is also provided. | 06-03-2010 |
20100146856 | MULTIZONE CO-GASIFICATION - A gasifier is provided gasify multiple fuels. The gasifier is configured to include a first gasification zone for gasifying a high-calorific-value feedstock with an oxidant. The gasifier is configured to substantially consume the oxidant within the first gasification zone. The gasifier further includes a second gasification zone for gasifying a low-calorific-value, high-oxygen-content feedstock. The high-calorific-value fuel may be coal and the low-calorific-value fuel may be biomass. | 06-17-2010 |
20100146857 | METHOD OF OPERATING A GASIFIER - A method of operating a gasifier is provided that envisions dividing the gasifier into multiple zones. A high-calorific-value feedstock with an oxidant is injected in the first zone. The gasifier is operated to substantially consume the oxidant within the first gasification zone. The method of operating the gasifier further includes injecting a low-calorific-value, high-oxygen-content feedstock in a second gasification zone. The low-calorific-value, high-oxygen-content feedstock is devolatilized and gasified in second zone. A method of operation provides for a synergistic co-gasification of the high-calorific-value feedstock and the low-calorific-value, high oxidant content feedstock. The method provides for specific control actions that enable operation of multi-fuel, multizone gasifier. | 06-17-2010 |
20100146858 | METHOD OF RETROFITTING A COAL GASIFIER - A coal gasifier is retrofitted to achieve multiple advantages such as reduced oxygen consumption, reduced CO2 and NOx emissions, better H:C ratio, better carbon conversion etc. This is achieved by dividing the coal into at least two zones and modifying the gasifier and operating it as described. The coal is injected into a first zone, configured to devolatilize a substantial portion of the injected coal to produce coal char and volatiles. The operation is tuned to substantially consume the oxidant injected in the first zone. A low-calorific-value, high oxidant feedstock is injected in second zone of the gasifier. The devolatilization of the low-calorific-value, high oxidant content feedstock provides the oxygen containing compounds which gasify at least a portion of the coal char generated in the first zone. | 06-17-2010 |
20100180771 | FLUIDIZED BED SYSTEM FOR REMOVING MULTIPLE POLLUTANTS FROM A FUEL GAS STREAM - A system includes an adsorber having a fluidized bed of a plurality of adsorption materials. The adsorber is configured to receive the gaseous fuel stream including the plurality of pollutants and adsorb the said plurality of pollutants in a single unit from the gaseous fuel stream to generate a clean gas stream substantially free of the pollutants. Different adsorption materials are designed to remove different pollutants over a similar temperature range. The pollutants include at least one of sulfur compounds, chlorine, ammonia, mercury, arsenic, selenium, cadmium, or combinations thereof. | 07-22-2010 |