General Electric Company

Vladimir Zamansky

Vitali Victor Lissianski

Peter Martin Maly

Ke Liu

William Randall Seeker

Roy Payne

Arnaldo Frydman

Boris Nikolaevich Eiteneer

Wei Wei

Parag Prakash Kulkarni

Loc Ho

Ravichandra Srinivasa Jupudi

Ramanathan Subramanian

Narendra Digamber Joshi

Roy James Primus

Gregory Ronald Gillette

Larry Swanson

Jonathan Lloyd Male

Wei Zhou

Teresa Grocela Rocha

Gregg Anthony Deluga

Charles Michael Booth

William Steven Lanier

Kenneth Brakeley Welles

Matthew Christian Nielsen

Aditya Kumar

Surinder Prabhjot Singh

Harish Radhakrishna Acharya

Tiffany Elizabeth Pinard Westendorf

Ruijie Shi

James Patrick Francis Lyons

Richard Anthony Depuy

Boris Nickolaevich Eiteneer

Shawn Barge

Ravi Vipperia Kumar

George Rizeq

Yuri Mikhailovloh Mospan

Gregory Anthony DeLuga

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.

Method of reducing oxygen requirement of a coal gasifier

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.

Plasma-assisted waste gasification system

Method of retrofitting a coal 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.

Method of operating a gasifier

A fuel preparation system includes a fractionation unit for treating fuel containing vanadium. A gas turbine is connected to the fractionation unit to receive treated fuel. The gas turbine may deliver exhaust from the gas turbine to the fractionation unit. The fuel preparation system may include a burner for burning a heavy fuel fraction from the faction unit and for delivering exhaust from the burner to the fractionation unit. The fuel preparation unit may include a boiler to receive the heavy fuel fraction for combustion and for delivering steam to the fractionation unit.

Systems for removing vanadium from low-grade fuels

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.

Integrated system and method for producing fuel composition from biomass

Disclosed herein is a system for reducing NOemissions comprising a fuel tank in fluid communication with a fuel converter, wherein the fuel converter is located down stream of the fuel tank and wherein the fuel converter comprises a catalyst composition that is operative to continuously convert heavy hydrocarbon molecules having 9 or more carbon atoms per molecule into light hydrocarbon molecules having 8 or less carbon atoms per molecule; a selective catalytic reduction catalyst reactor in fluid communication with the fuel converter and located downstream of the fuel converter; and an engine in fluid communication with the fuel tank and the selective catalytic reduction catalyst reactor, wherein the engine is located downstream of the fuel tank and upstream of the selective catalytic reduction catalyst reactor.

[object Object]

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.

Methods and systems for removing vanadium from low-grade fuels

A combustion apparatus for combusting including: a boiler defining an enclosed flue gas path having a combustion zone and a burnout zone, wherein flue gas is formed in the combustion zone and the combustion flue gas comprising nitrogen oxides; a fuel injector aligned with and introducing fuel into the combustion zone and a combustion air injector aligned with and introducing air into the combustion zone; an overfire air system adjacent the burnout zone comprising an overfire air port adjacent the burnout zone and through which overfire air flows into the burnout zone, and a nitrogen reagent injector having an outlet aligned with the overfire air system and injecting nitrogen reagent gas or small droplets into said overfire air, wherein said small droplets have an average diameter of no greater than 50 microns.

Combustion apparatus to reduce flue gas NOx by injection of n-agent droplets and gas in overfire air

The disclosed embodiments relate to a method and system for regeneration of a catalyst. The system includes an engine that creates an exhaust stream and a fuel supply adapted to supply a fuel stream to the engine. A reactor includes a catalyst and is in fluid communication with the engine to receive the exhaust stream. A sensor senses a system parameter and produces a signal corresponding to the system parameter. A controller receives the signal and directs at least a portion of the exhaust stream or at least a portion of the fuel stream to the catalyst to control a regeneration operation based on a value of the system parameter sensed by the sensor.

Method and system for regeneration of a catalyst

A method to reduce mercury in gas emissions from the combustion of coal is disclosed. Mercury emissions can be reduced by staging combustion process and/or reducing boiler excess oxygen. Fly ash formed under combustion staging conditions is more reactive towards mercury than fly ash formed under typical combustion conditions. Reducing boiler excess oxygen can also improve ability of fly ash to adsorb mercury.

Mercury reduction system and method in combustion flue gas using staging

A system for production of hydrogen comprises at least one steam reforming zone configured to receive a first fuel and steam to produce a first reformate gas stream comprising hydrogen using a steam reforming process. The system further comprises a mixed reforming zone configured to receive an oxidant to produce a second reformate gas stream comprising hydrogen, wherein the first reformate gas stream is sent to the mixed reforming zone to complete the reforming process.

System and method for hydrogen production

A system for producing synthesis gas includes a regeneration zone. The regeneration zone includes a first fluidized bed configured to receive an oxidant for producing a regenerated oxygen transfer material. The system further includes a mixed reforming zone comprising a second fluidized bed configured to receive a first fuel and the regenerated oxygen transfer material to produce a first reformate stream and a steam reforming zone comprising a third fluidized bed configured to receive the first reformate stream, a second fuel and steam to produce the synthesis gas. The regeneration zone, mixed reforming zone and steam-reforming zone are in fluid communication with each other.

System and method for producing synthesis gas

A method to reduce emissions in flue gas due to combustion of coal in a combustion unit including the steps of: combusting coal in a primary combustion zone of the combustion unit; releasing elemental mercury from the combustion into the flue gas; injecting NHCl, NHBr, or NHI into the flue gas; oxidizing the elemental mercury with halogen from the additive; adsorbing the oxidized mercury generated by the combustion of the coal with an adsorbent in the flue gas, and collecting the adsorbent with the oxidized mercury in a combustion waste treatment system.

Method for removal of mercury emissions from coal combustion

A method to reduce mercury in gas emissions from the combustion of low rank coal in a combustion system including: combusting coal having a low chlorine content in the combustion system, wherein elemental mercury (Hg) is released in the flue gas produced by the combustion of the low rank coal; releasing chlorine into the flue gas by combusting a coal having a high chlorine in the combustion system; reacting the elemental mercury and released chlorine in the flue gas to oxidize the mercury; adsorbing at least a portion of the oxidized mercury generated by the combustion of the coal with an adsorbent in the flue gas, and collecting the adsorbent with the oxidized mercury in a combustion waste treatment system.

Growing community of inventors

Oceanside, CA, United States of America

Vladimir Zamansky