Abstract:
A method of operating an oxygen transport membrane based reforming system employing one or more packs of thermally coupled panels of reformer tubes and oxygen transport membrane ("OTM") reactors close to thermo-neutral point is provided. The method produces syngas by converting a hydrocarbon-containing feed, such as natural gas in the reformer tubes of a pack by endothermic steam reforming reactions. The heat required for endothermic reforming reactions is provided by exothermic oxidizing reactions occurring inside the OTM reactors of the pack. At a thermo-neutral point the heat released by exothermic reactions matches the heat required to support endothermic reactions and heat losses in the pack. The method modulates the flow rate of hydrocarbon-containing feed and/or steam-to- carbon ratio of the combined feed to the pack to maintain the surface temperature of oxygen transport membrane reactors below a target maximum temperature. The syngas product oxygen-to-carbon ratio is maintained within a desired target range such that the OTM based reforming system is operated close to thermo-neutral point.
Abstract:
A system and method for temperature control in an oxygen transport membrane based reactor is provided. The system and method involves introducing a specific quantity of cooling air or trim air in between stages in a multistage oxygen transport membrane based reactor or furnace to maintain generally consistent surface temperatures of the oxygen transport membrane elements and associated reactors. Each stage includes a cooling air inlet circuit operatively connected to cooling air distribution manifolds (312), cooling air distribution tubes (313). Systems and methods including air diffuser screens (325) disposed proximate the back window or distal end of the furnace segment (304) are also disclosed. The associated reactors may include reforming reactors, boilers or process gas heaters.
Abstract:
A dual utilization liquid and gaseous fuel CPOX reformer that includes reaction zones for the CPOX reforming of liquid and gaseous reformable fuels. A reforming method is also provided. The method comprises reforming a first gaseous reformable reaction mixture comprising oxygen-containing gas and vaporized liquid fuel and before or after this step, reforming second gaseous reformable reaction mixture comprising oxygen~containing gas and gaseous fuel to produce a hydrogen-rich reformate.
Abstract:
The invention relates to a process for the production of liquid hydrocarbons by Fischer-Tropsch synthesis in which the reforming section of the plant comprises a process line comprising autothermal reforming (ATR) (5) or catalytic partial oxidation (CPO), and a separate process line comprising steam methane reforming (SMR) (8).
Abstract:
A system and method for temperature control in an oxygen transport membrane based reactor is provided. The system and method involves introducing a specific quantity of cooling air or trim air in between stages in a multistage oxygen transport membrane based reactor or furnace to maintain generally consistent surface temperatures of the oxygen transport membrane elements and associated reactors. Each stage includes a cooling air inlet circuit operatively connected to cooling air distribution manifolds (312), cooling air distribution tubes (313). Systems and methods including air diffuser screens (325) disposed proximate the back window or distal end of the furnace segment (304) are also disclosed. The associated reactors may include reforming reactors, boilers or process gas heaters.
Abstract:
A multi-tubular chemical reactor includes an igniter for the initiation of gas phase exothermic reaction within the gas phase reaction zones of the tubular reactor units.
Abstract:
A method of producing synthesis gas for methanol synthesis (7) that comprises the steps of: (a) obtaining a hydrogen stream that has greater than 5 mol% methane from an external process; (b) feeding into a reforming reactor (4): (i) a feed gas that comprises methane(l), (ii) water (2) in a specified amount, (Hi) oxygen (3) in a specified amount, and (iv) the hydrogen stream in a specified amount; (c) reacting the feed gas, water, oxygen and the hydrogen stream in the reactor; and (d) withdrawing from the reactor the synthesis gas (5) that is at a specific temperature, has less than 3 mol% methane, and has a stoichiometric number of from 1.9 to 2.3.
Abstract:
The invention is directed to a process for the production of hydrocarbon products from a methane comprising feedstock comprising of the steps of : preparing a feed syngas comprising hydrogen and carbon monoxide having a hydrogen/carbon monoxide molar feed ratio in a syngas manufacturing process and using the feed syngas in a Fischer-Tropsch process using one or more fixed bed catalyst beds as present in one or more syngas conversion reactors thereby obtaining the hydrocarbon product and an residual tail gas. The manufacturing process comprises of two parallel operated syngas manufacturing processes starting from the same gaseous methane comprising feedstock. One syngas manufacturing process is a partial oxidation (POX) process which prepares a syngas having a hydrogen/carbon monoxide [H 2 /CO] molar ratio below the molar feed ratio and The second syngas manufacturing process is a heat exchange reforming (HER) process, which prepares a syngas having a hydrogen/carbon monoxide [H 2 /CO] molar ratio above the molar feed ratio.
Abstract:
In various systems and processes, synthesis gas generation may be combined. A partial oxidation reactor (POX) and a gas convectively heated steam/hydrocarbon catalytic reformer (GHR) may be combined to produce synthesis gas. In some implementations, a partial oxidation reactor, a gas convectively heated steam/catalytic reformer, and a waste hat boiler may be combined to produce synthesis gas.
Abstract:
The present invention is directed to a process for generating electricity in a solid oxide fuel cell system. A mixture of steam and a hydrocarbon containing feed is reformed to produce a reformed product gas containing hydrogen. A first gas stream containing at least 0.6 mole fraction hydrogen is separated from the reformed product gas and fed to the anode of a solid oxide fuel cell. The first gas stream is mixed with an oxidant at one or more anode electrodes in the fuel cell to generate electricity. An anode exhaust stream comprising hydrogen and water is separated from the fuel cell. The anode exhaust stream and/or a cathode exhaust stream from the fuel cell is fed into the reforming reactor, where heat is exchanged between the hot anode and/or cathode exhaust streams and the reactants in the reforming reactor.