Integrated plants and associated processes for producing ammonia and sulfuric acid have been developed comprising air separation and water electrolysis subsystems and which make surprisingly efficient use of the products from these subsystems (i.e. oxygen and nitrogen from the former and hydrogen and oxygen from the latter). The invention is particularly suitable for use as part of an integrated fertilizer production plant.

A full liquid-product air separation equipment is disclosed. The equipment comprises an air filtration system, a compression system, a precooling system, a purification system, a high-temperature expander having a first pressurizing part and a first expanding part, a low-temperature expander having a second pressurizing part and a second expanding part, a main heat exchanger having a first heat exchange pipeline, a second heat exchange pipeline, a third heat exchange pipeline, a fourth heat exchange pipeline and a fifth heat exchange pipeline, and a rectification system for rectifying air. The equipment has a simple configuration, is easy to implement, and has high gas separation efficiency and low energy consumption.

A device and a method for producing hydrogen and byproduct oxygen by using green electricity electrolyzed water are provided. The device comprises an oxygen purifying system, a heat exchange system, an air separation compression and expansion system, an air separation rectification system and a liquid oxygen storage system. The method comprises the following steps: first, purifying oxygen prepared by electrolyzing water by green electricity to remove impurities such as hydrogen, carbon monoxide, carbon dioxide and water in the oxygen, then feeding the pure oxygen into the heat exchange system, performing heat exchange liquefaction to obtain liquid oxygen, coupling the liquid oxygen generated by rectification of the air separation rectification system, and obtaining pressurized oxygen through the heat exchange system and the air separation compression and expansion system.

An engine-driven cryogenic cooling system for an aircraft includes a first air cycle machine, a second air cycle machine, and a means for condensing a chilled air stream into liquid air for an aircraft use. The first air cycle machine includes a plurality of components operably coupled to a gearbox of a gas turbine engine and configured to produce a cooling air stream based on a first engine bleed source of the gas turbine engine. The second air cycle machine is operable to output the chilled air stream at a cryogenic temperature based on a second engine bleed source cooled by the cooling air stream of the first air cycle machine.

A system for extracting oxygen from a fluid includes a separator allowing a fluid to pass lengthwise through the separator to produce a mixture with the fluid having at least a portion of oxygen removed from the fluid. The separator includes a wall surrounding an interior portion of a tube. The wall has at least one aperture formed in the wall. The separator also includes at least one magnet positioned adjacently to the at least one aperture. The magnet has a north pole end and a south pole end. A magnetic field gradient is formed between the north pole end and the south pole end, and extends into an interior portion of the tube. The system also includes a storage tank fluidly coupled to the at least one aperture for storing the at least a portion of the oxygen removed from the fluid via the separator.

Provided herein are systems, apparatus, and methods for extracting pure oxygen from a liquid. In some embodiments, a system for extracting oxygen from a liquid comprises a separator configured to allow a liquid to pass therethrough and to produce a liquid mixture comprising the liquid having at least a portion of oxygen removed therefrom. The separator comprises a wall surrounding an interior portion of a tube, the wall having at least one aperture formed therein. The separator also comprises at least one magnet positioned adjacently to the at least one aperture having a north pole end and a south pole end forming a magnetic field gradient therebetween and extending into an interior portion of the tube. The system also comprises a storage tank fluidly coupled to the at least one aperture and configured to store the at least a portion of oxygen removed from the liquid via the separator.

Method for the preparation of ammonia synthesis gas by a combination of ATR or secondary reforming process using oxygen from an air separation unit and electrolysis of water for the production of ammonia synthesis gas.

Magnetic systems and methods for oxygen separation and purification from fluids utilizing the paramagnetic properties of oxygen. A magnetic field gradient is established in a tube having a first end in flow communication with a source of a fluid containing oxygen. The fluid is flowed through the tube. The magnetic field gradient causes oxygen to be enriched in the fluid on a first interior side of the tube as compared to a second interior side of the tube. For a fluid like air having oxygen, a paramagnetic substance, and other, e.g., diamagnetic, components like nitrogen, argon, carbon dioxide and water vapor, the technology of the disclosure effectively separates oxygen molecules from the other components in magnetic field gradients of sufficient magnitude.

An apparatus and method of separation of LOX and other commercially valuable components, such as LAr from liquefied air, which consists primarily of LN2. Strong magnetic field gradient and gravity are used to separate LOX from liquefied air, based upon the different magnetic properties of LOX and LN2. The apparatus and method employ a magnetic field gradient to levitate the LN2 and LAr diamagnetic components of liquid air while accelerating the paramagnetic LOX component toward the bottom to achieve oxygen separation. In other embodiments, a leak valve system can be used.

A cryogenic cooling system for an aircraft includes a first air cycle machine, a second air cycle machine, and a means for collecting liquid air. The first air cycle machine is operable to output a cooling air stream based on a first air source. The second air cycle machine is operable to output a chilled air stream at a cryogenic temperature based on a second air source cooled by the cooling air stream of the first air cycle machine. An output of the second air cycle machine is provided to the means for collecting liquid air.