A process to produce at least carbon dioxide and carbon monoxide from a feed gas containing carbon dioxide, hydrogen and carbon monoxide; comprises separating at least part of the carbon dioxide from the compressed feed gas by partial condensation and/or distillation producing a carbon dioxide product and a carbon dioxide depleted stream, treating the carbon dioxide depleted stream in a treatment unit to produce a feed stream containing carbon monoxide and hydrogen, less rich in carbon dioxide than the carbon dioxide depleted stream and feeding at least part of the feed stream containing carbon monoxide and hydrogen to a separation unit operating at cryogenic temperatures to produce a carbon monoxide product.

A method for separating a synthesis gas containing carbon monoxide and hydrogen including compressing a flow of synthesis gas received from a source of synthesis gas in a compressor, purifying the compressed synthesis gas in a purification unit to purify it of water and/or carbon dioxide, cooling the compressed and purified flow of synthesis gas, separating the cooled flow of synthesis gas by washing and/or distillation at a cryogenic temperature and optionally by adsorption in a separating unit, and producing at least the following three gases in the separating unit: a carbon monoxide-enriched gas, a hydrogen-enriched gas, a residual gas containing carbon monoxide and hydrogen that is less pure with respect to carbon monoxide than the carbon monoxide-enriched gas and less pure with respect to hydrogen than the hydrogen-enriched gas.

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product.

A method for the liquefaction of an industrial gas by integration of a methanol plant and an air separation unit (ASU) is provided. The method can include the steps of: (a) providing a pressurized natural gas stream, a pressurized purge gas stream originating from a methanol plant, and a pressurized air gas stream comprising an air gas originating from the ASU; (b) expanding three different pressurized gases to produce three cooled streams, wherein the three different pressurized gases are the pressurized natural gas stream, the pressurized purge gas stream, and the pressurized air gas stream; and (c) liquefying the industrial gas in a liquefaction unit against the three cooled streams to produce a liquefied industrial gas stream. The industrial gas to be liquefied is selected from the group consisting of a first portion of the pressurized natural gas stream, a nitrogen gas stream, hydrogen and combinations thereof.

The invention relates to an installation (1) and a method allowing the near total recovery and space-saving storage of carbon in the form of liquid carbon dioxide (19), from a substance (9) of the group consisting of hydrocarbons/ethers/alcohols, without the use of gas compression. To achieve this, a superheated gas (12) at a pressure of over 5.18 bar is generated from the substance (9) of the group consisting of hydrocarbons/ethers/alcohols and water (10), and this gas is delivered, by means of steam reforming and hydrogen liberation, into a retentate mass flow (15) containing carbon dioxide. Liquid carbon dioxide (19) is obtained therefrom by means of condensation, and is stored in a storage tank (7) while the liberated hydrogen is oxidised to provide mechanical and/or electrical as well as thermal energy. The use of membranes with low hydrogen/carbon dioxide permeation selectivity is permitted by forming a permeate mass flow circuit that is closed in respect of carbon dioxide. Operation at low pressures is permitted by the condensation and storage at temperatures below the ambient temperature, for which purpose cold (17) is generated from said thermal energy in a sorption method.

The present disclosure relates to systems and methods useful for providing one or more chemical compounds in a substantially pure form. In particular, the systems and methods can be configured for separation of carbon dioxide from a process stream, such as a process stream in a hydrogen production system. As such, the present disclosure can provide systems and method for production of hydrogen and/or carbon dioxide.

Systems and methods are provided for incorporating molten carbonate fuel cells into a heat recovery steam generation system (HRSG) for production of electrical power while also reducing or minimizing the amount of CO.sub.2 present in the flue gas exiting the HRSG. An optionally multi-layer screen or wall of molten carbonate fuel cells can be inserted into the HRSG so that the screen of molten carbonate fuel cells substantially fills the cross-sectional area. By using the walls of the HRSG and the screen of molten carbonate fuel cells to form a cathode input manifold, the overall amount of duct or flow passages associated with the MCFCs can be reduced.

Process for the combined production of a mixture of hydrogen and nitrogen, and of carbon monoxide by cryogenic distillation and cryogenic scrubbing, wherein a methane-rich liquid is introduced at a first intermediate level of a scrubbing column as first scrubbing liquid and at least one nitrogen-rich liquid is introduced at a level higher than the first level of the scrubbing column as second scrubbing liquid and a mixture of hydrogen and nitrogen is drawn off as overhead gas from the scrubbing column.

A process and a related equipment for making ammonia make-up synthesis gas are disclosed, where: a hydrocarbon feedstock is reformed obtaining a raw ammonia make-up syngas stream; said raw syngas is purified in a cryogenic purification section refrigerated by a nitrogen-rich stream produced in an air separation unit; the nitrogen-rich stream at output of said cryogenic section is further used for adjusting the hydrogen/nitrogen ratio of the purified make-up syngas; an oxygen-rich stream is also produced in said air separation unit and is fed to the reforming section.

A method and a system to form hydrogen while removing sulfur from an acid gas stream are provided. An exemplary system includes a reaction furnace including a porous burner, an inlet for an oxygen stream into the porous burner, an inlet for the acid gas stream into the porous burner, and a plurality of inlets on the reaction furnace for injecting an inert coolant.