1577 results about "Partial oxidation" patented technology

A multimetal oxide material contains the elements Mo, V and Te and / or Sb and at least one of the elements Nb, Ti, W, Ta and Ce and promoters and has a specific X-ray diffraction pattern. Moreover, such a multimetal oxide material is used as a catalyst for heterogeneously catalyzed gas-phase partial oxidations of hydrocarbons.

Process for the production of liquid hydrocarbons from a feedstock that comprises at least one elementary feedstock from the group of biomass, coal, lignite, petroleum residues, methane, and natural gas, comprising: at least one stage a) for gasification of the feedstock by partial oxidation and / or steam reforming to produce a synthesis gas SG; a stage b) for separating CO2 from SG and a portion of the effluent of the subsequent stage c); the mixing of a portion of the CO2 that is separated with a gas of an H2 / CO ratio of more than 3; a stage c) for partial conversion with hydrogen, thermal or thermocatalytic, of the CO2 that is present in said first mixture according to the reaction: CO2+H2→CO+H2O in a specific reaction zone that is separated from said gasification zone or zones; a stage d) for Fisher-Tropsch synthesis on a synthesis gas that comprises at least a portion of SG and at least a portion of the CO that is produced by the conversion of CO2 into hydrogen.

A method of operating a gas turbine power plant and gas turbine power plant are disclosed wherein hydrogen for the combusting process is produced by feeding natural gas mixed with steam through a membrane / partial oxidation reactor and converting the natural gas at least to H2 and CO. Thereby oxygen is transferred from the compressed air through the membrane of the membrane / partial oxidation reactor and the oxygen is used for the partial oxidation process of the natural gas. The process is followed by converting the syngas in a CO shift reactor and a CO shift reactor to a CO2 removal equipment to mainly hydrogen.

A photoelectrochemical assay apparatus for determining chemical oxygen demand (COD) of a water sample which consists of a) a measuring cell for holding a sample to be analysed b) a titanium dioxide nanoparticle photoelectric working electrode and a counter electrode disposed in said cell, c) a UV light source adapted to illuminate the photoelectric working electrode d) control means to control the illumination of the working electrode e) potential measuring means to measure the electrical potential at the working and counter electrodes f) analysis means to derive a measure of oxygen demand from the measurements made by the potential measuring means. The method of determining chemical oxygen demand of a water sample, comprises the steps of a) applying a constant potential bias to a photoelectrochemical cell, containing a supporting electrolyte solution; b) illuminating the working electrode with a UV light source and recording the background photocurrent produced at the working electrode from the supporting electrolyte solution; c) adding a water sample, to be analysed, to the photoelectrochemical cell; d) illuminating the working electrode with a UV light source and recording the total photocurrent produced; e) determining the chemical oxygen demand of the water sample according to the type of degradation conditions employed. The determination may be under exhaustive degradation conditions, in which all organics present in the water sample are oxidised or under non-exhaustive degradation conditions, in which the organics present in the water sample are partially oxidised.

The present disclosure relates to a power production system that is adapted to achieve high efficiency power production with complete carbon capture when using a solid or liquid hydrocarbon or carbonaceous fuel. More particularly, the solid or liquid fuel first is partially oxidized in a partial oxidation reactor. The resulting partially oxidized stream that comprises a fuel gas is quenched, filtered, cooled, and then directed to a combustor of a power production system as the combustion fuel. The partially oxidized stream is combined with a compressed recycle CO2 stream and oxygen. The combustion stream is expanded across a turbine to produce power and passed through a recuperator heat exchanger. The expanded and cooled exhaust stream is scrubbed to provide the recycle CO2 stream, which is compressed and passed through the recuperator heat exchanger and the POX heat exchanger in a manner useful to provide increased efficiency to the combined systems.

The invention is directed to a process wherein a feedstock or stream comprising steam cracker tar is passed to a vacuum pipestill. A deasphalted cut of tar is obtained as an overhead (or sidestream) and a heavy tar asphaltenic product is obtained as bottoms. In preferred embodiments, at least a portion of the bottoms product is sent to a partial oxidation unit (POX) wherein syn gas may be obtained as a product, and / or at least a portion of the bottoms product is used to produce a light product stream in a coker unit, such as coker naphtha and / or or coker gas oil. In another preferred embodiment at least a portion of the overheads product is added to refinery fuel oil pools and in yet another preferred embodiment at least a portion of the overheads product is mixed with locally combusted materials to lower soot make. Two or more of the aforementioned preferred embodiments may be combined.

This invention relates to methods for reacting a hydrocarbon, molecular oxygen, and optionally water and / or carbon dioxide, to form synthesis gas. The preferred embodiments are characterized by delivering a substochiometric amount of oxygen to each of a multitude of reaction zones, which allows for optimum design of the catalytic packed bed and the gas distribution system, and for the optimization and control of the temperature profile of the reaction zones. The multitude of reaction zones may include a series of successive fixed beds, or a continuous zone housed within an internal structure having porous, or perforated, walls, through which an oxygen-containing stream can permeate. By controlling the oxygen supply, the temperatures, conversion, and product selectivity of the reaction can be in turn controlled and optimized. Furthermore the potential risks of explosion associated with mixing hydrocarbon and molecular oxygen is minimized with increased feed carbon-to-oxygen molar ratios.

By using catalytic partial oxidation or autothermal reforming process, a catalytic oxidizer installed in the engine's Exhaust Gas Recycle (EGR) line can be used to produce from fossil fuels or bio-fuels a reformate gas containing H2 and CO for an IC engine or a gas turbine. Thus, a system consisting of an EGR Oxidizer and an IC engine / gas turbine can be used by itself as a driving device, or can be combined with an electric generator and a battery bank to produce, store and transmit electricity to be used in stationary or mobile power generation, transportation and utility etc.The Oxidizer can also be used to provide reducing gases to regenerate the NOx or diesel particulate traps, so that the traps can continuously be used for reducing emissions from IC engine, diesel truck, gas turbine, power plant etc.

A process to prepare elemental iron by contacting an iron ore feed with a reducing gas at a pressure of between 1 and 10 bar to obtain iron and an off-gas includes preparing the reducing gas by performing the following steps: (a) partially oxidizing a mixture comprising a solid or liquid carbonaceous fuel and oxygen at a pressure of between 10 and 80 bar, thereby obtaining a gas comprising H2 and CO; (b) removing CO2 and H2S from the gas obtained in step (a) to obtain an intermediate gas comprising H2 and CO; (c) supplying the intermediate gas obtained in step (b) to a H2-selective membrane to obtain a H2-rich permeate gas and a CO-rich retentate; and (d) heating H2-rich permeate to obtain a heated H2-rich permeate as the reducing gas.

The present disclosure relates to a power production system that is adapted to achieve high efficiency power production with complete carbon capture when using a solid or liquid hydrocarbon or carbonaceous fuel. More particularly, the solid or liquid fuel first is partially oxidized in a partial oxidation reactor. The resulting partially oxidized stream that comprises a fuel gas is quenched, filtered, cooled, and then directed to a combustor of a power production system as the combustion fuel. The partially oxidized stream is combined with a compressed recycle CO2 stream and oxygen. The combustion stream is expanded across a turbine to produce power and passed through a recuperator heat exchanger. The expanded and cooled exhaust stream is scrubbed to provide the recycle CO2 stream, which is compressed and passed through the recuperator heat exchanger and the POX heat exchanger in a manner useful to provide increased efficiency to the combined systems.

A device and a method for flame stabilization in a burner (10), includes a burner housing at least partially enclosing a burner volume, into which may be introduced via at least one fuel line, fuel, and via at least one air feed means, air, forming an air / fuel mixture spreading in a preferred flow direction, which may be ignited in a combustion chamber (11) connecting downstream of the burner housing to form a stationary flame (13). Upstream of the flame (13), a catalyst arrangement (1) is provided through which an air / pilot fuel mixture (4), separate from the air / fuel mixture, is flowable. The catalyst arrangement (1) has at least two catalyst stages which are located one behind the other in the through-flow direction, of which the catalyst stage (3) located upstream, the so-called POX-catalyst, is flow-washable by the air / pilot fuel mixture (4) with an air / pilot fuel mixture ratio λ<1, by which catalyst stage (3) the air / pilot fuel mixture (4) is partially oxidized, and of which catalyst stages the downstream catalyst stage (8), the so-called FOX-catalyst, is flow-washable by a leaned air / pilot fuel mixture (7) with a mixture ratio λ>1, by which the leaned air / pilot fuel mixture is completely oxidized forming an inert hot gas flow (9).

The invention discloses a wet method smoke gas denitration technology of two segments of liquid phase oxidation and absorption, which adopts solution or mixtures of one or more of potassium permanganate, sodium chlorite, sodium hypochlorite, calcium hypochlorite, oxyful and chlorine dioxide as oxidizing agents to ensure nitrogen oxide in smoke gas contact and react with the oxidizing agents. After the nitrogen oxide is partially oxidized into nitrogen dioxide, oxidized nitrogen oxide in the smoke gas is absorbed by alkali liquid to generate corresponding nitrite. The technology adopts liquid phase oxidation to replace gas phase oxidation so as to reduce the investment and the running cost, simplify the technical process and the system structure, and enhance the operability. Compared with a method that oxidation and absorption are simultaneously carried out in the liquid phase, the two-segment technology not only can increase the removal efficiency, avoid secondary pollution caused by incomplete absorption of NO2, but also can achieve the purposes of selectively generating and recovering the nitrite in the absorption stage by controlling the oxidation degree of the oxidation stage.

A power generation system and method in which a fuel gas is introduced into a combustor and at least a portion of the fuel gas is combusted in the combustor, producing an exhaust gas having no appreciable available oxygen. The exhaust gas is introduced as a working fluid into a gas turbine, thereby generating power. Cooling of the power generation system is accomplished using a cooling fluid selected from the group consisting of synthesis gas, natural gas, natural gas / steam mixture, flue gas, flue gas / steam mixture, and mixtures thereof.