Abstract: A method and an apparatus for producing carbon dioxide by cryogenic distillation is provided.

Abstract: An apparatus and process for separating air by cryogenic distillation includes a heat exchanger, a column system having at least one cryogenic distillation column, a conduit for supplying the column system with cooled air from the heat exchanger, a storage tank, a conduit for removing a liquid from the column system and sending it to the storage tank, at least one pump, at least one conduit for sending pumped liquid from the outlet of the or each pump to the heat exchanger, at least one conduit connected to the outlet of the pump or at least one outlet of at least one pump and to a column of the column system, said conduit passing directly to the column without passing via the storage tank.

Abstract: In a method for purifying a flow rich in carbon dioxide and containing at least one impurity lighter than carbon dioxide, the flow is cooled in a heat exchanger (7) and partially condensed, the partially condensed flow is sent to a first phase separator (9) operating under a first pressure, a gas from the first phase separator is compressed and sent to a second phase separator (31) operating under a second pressure higher than the first pressure, a first liquid (11) is sent from the first phase separator to a housing (15) operating under a pressure lower than the first pressure, and a second liquid (33) is sent to the housing.

Abstract: In a cooling and compressing process, a wet feed gas (1) that is rich in carbon dioxide is scrubbed with water and with an antifreeze agent in a column (3) in order to produce a flow of gas that is rich in carbon dioxide, water-depleted and cooled, the flow of gas rich in carbon dioxide is compressed in a compressor (20) and a liquid rich in carbon dioxide (18) is vaporized in order to cool the water and antifreeze agent before sending them to the scrubbing operation, it being possible for the liquid to originate from an external source.

Abstract: A process for compressing a CO2-rich fluid containing water. The CO2-rich fluid is compressed in a compressor; upstream of the compression step, an antifreeze is mixed with the CO2-rich fluid containing water. The CO2-rich fluid containing antifreeze is cooled, water is separated from the cooled fluid and the water-depleted cooled fluid is compressed in the compressor, wherein the CO2-rich fluid containing water is sent to a scrubbing column fed, preferably at the top, with a water/antifreeze mixture, where it cools and is separated from the water, the water-depleted cooled fluid is extracted from the top of the column; a water/antifreeze mixture in the column is extracted at a level below the top; the mixture is cooled using the refrigeration from an apparatus for cooling and/or purifying the cooled fluid compressed in the compressor and the fluid is returned to the top of the column.

Abstract: A device for separating a gas mixture containing at least 35 mol % carbon dioxide and also at least one gas lighter than carbon dioxide, comprising a first phase separator configured to receive a first partially condensed flow from an exchange line; a first phase separator configured to separate the gas phase from the liquid phase; a cooling means configured to receive the gas phase from the first phase separator and cool said gas phase to form a second partially condensed flow. The resulting liquid phase is then sent to a first valve and is expanded to a lower pressure that is at most 300 mbar lower in order to form a first expanded liquid, which is then mixed with a second liquid originating from the second phase separator in a mixing means that is located upstream of a third valve.

Abstract: The present invention relates to a process and to a unit for drying and compressing a CO2-rich stream. The CO2-rich fluid is compressed in a compressor; upstream of the compression step, an antifreeze is mixed with the CO2-rich fluid containing water; the CO2-rich fluid containing the antifreeze is cooled, water is separated from the cooled fluid and the water-depleted cooled fluid is compressed in the compressor; and the CO2-rich fluid containing water is sent to a scrubbing column fed with a water/antifreeze mixture, where it cools and is separated from the water.

Abstract: A carbon dioxide-rich mixture is cooled in a first brazed aluminum plate-fin heat exchanger, at least one fluid derived from the cooled mixture is sent to a purification step having a distillation step and/or at least two successive partial condensation steps, the purification step produces a carbon dioxide-depleted gas which heats up again in the first exchanger, the purification step produces a carbon-dioxide rich liquid which is expanded, then sent to a second heat exchanger where it is heated by means of a fluid of the method, the exchanger carrying out an indirect heat exchange only between the carbon dioxide-rich liquid and the fluid of the method, the carbon dioxide-rich liquid at least partially vaporizes in the second exchanger and the vaporized gas formed heats up again in the first exchanger to form a carbon dioxide-rich gas which can be the end product of the method.

Abstract: In a process for the separation of a gas rich in carbon dioxide and containing at least one component lighter than carbon dioxide, the feed gas rich in carbon dioxide is cooled in a first heat exchanger, partially condensed and separated to form a gaseous portion and a liquid, sending the liquid portion to the top of a distillation column, removing a liquid stream richer in carbon dioxide than the feed gas from the bottom of the distillation column, removing a gaseous stream less rich in carbon dioxide than the feed gas from the top of the distillation column and warming the gaseous stream in the first heat exchanger, sending the gaseous portion to a shell and tube heat exchanger having tubes in a bath of triple point carbon dioxide, in which it condenses at least partially to form a liquid fraction, sending the liquid fraction to the top of the distillation column, vaporizing a liquid stream from the bottom of the distillation column outside or within the distillation column to form a gas which is subsequent

Abstract: The invention relates to a method for treating a gas stream comprising combustion fumes containing CO2 in an initial proportion, water vapor, one or more volatile acid compounds, and one or more additional impurities selected from among oxygen, nitrogen and argon, comprising the steps of: i) compressing the gas stream to a final pressure of 1 bar to 74 bar absolute; ii) cooling the gas stream to a temperature of around ?10° C. to around ?130° C. and eliminating at least one additional impurity; and iii) recovering a CO2-enriched gas stream containing a final proportion of CO2 greater than the initial proportion of CO2 in the stream to be treated. In addition, the method comprises, prior to step i), a step of pre-drying the stream for removing therefrom at least a portion of the water vapor which it contains.

Abstract: In a process for vaporizing a liquid stream rich in carbon dioxide wherein a liquid first stream rich in carbon dioxide is withdrawn from a chamber containing liquid rich in carbon dioxide and gas rich in carbon dioxide, the gas being at a pressure P1, the liquid first stream is sent to a heat exchanger where it is vaporized, all the liquid from the first stream is vaporized in the heat exchanger at a pressure or several pressures greater than P1, the vaporized first stream is extracted from the heat exchanger, expanded in a first expansion valve and sent to the heat exchanger where it is heated.

Abstract: In a method for cooling a flow containing at least 35% carbon dioxide and at least 0.2 ?g/Nm3 of mercury, the mercury being in liquid and/or gas form, the flow is cooled in a first brazed aluminum plate-fin heat exchanger from a first temperature to a second temperature higher than ?38.6° C. to form a cold flow at the second temperature, and the flow cooled to the second temperature is cooled in a second heat exchanger, which is a tube and shell heat exchanger, to a third temperature lower than ?38.6° C.

Abstract: The present invention relates to a process and apparatus for producing a fluid enriched in carbon dioxide starting from a waste gas from a ferrous metallurgy unit.

Abstract: In a process for the cryogenic separation of a feed mixture of at least carbon monoxide, hydrogen and methane, the feed mixture is separated in a methane wash column fed by a liquid methane stream at the top of the methane wash column to produce a gas enriched in hydrogen, a liquid stream from the bottom of the methane wash column is treated to produce a mixture of carbon monoxide and methane, the mixture of carbon monoxide and methane is separated in a separation column to produce a gas enriched in carbon monoxide and a liquid methane flow at least part of which forms a purge stream, the purge stream being varied to take account of load variations.

Abstract: According to certain embodiments of the invention, a gas containing at least 50% of carbon dioxide is cooled in a first exchanger so as to produce a cooled fluid, a liquid derived from the cooled fluid is sent to a distillation column to be separated therein, a head gas is withdrawn from the distillation column and reheated in the first exchanger, a vat liquid, which is richer in carbon dioxide than the gas containing at least 50% of carbon dioxide, is withdrawn and at least a portion thereof is heated in the first exchanger, at least a first portion of the vat liquid is vaporized in the first exchanger in order to produce a vaporized portion, the vaporized portion is sent back to the column and an NOx removal column is supplied with the liquefied cycle gas produced by vaporizing and reliquefying the vat liquid from the column.

Abstract: In a method for compressing a water-containing CO2-rich fluid wherein the CO2-rich fluid is compressed in a compressor located upstream from the compression step, an antifreeze agent is injected into the water-containing CO2-rich fluid in order to lower the water solidification temperature. The antifreeze agent-containing CO2-rich fluid is frozen, water is extracted from the frozen fluid, and the frozen fluid is compressed in the compressor.

Abstract: The present invention relates to a method for purifying a gas stream including CO2, elemental mercury (Hg0) and nitrogen oxides (NOx).

Abstract: A storage enclosure and an apparatus and method for producing carbon monoxide and/or hydrogen by means of cryogenic separation, including one such enclosure is provided.

Abstract: An improved refrigeration cycle is provided. The cycle provides for improved thermal performance by incorporating a refrigerant makeup tank that introduces liquid refrigerant with expanded refrigerant upstream of the heat exchanger, thereby providing a savings in either electricity costs or refrigerant.

Abstract: An improved refrigeration cycle is provided. The cycle provides for improved thermal performance by incorporating a refrigerant makeup tank that introduces liquid refrigerant with expanded refrigerant upstream of the heat exchanger, thereby providing a savings in either electricity costs or refrigerant.