Abstract: A unit for purifying a gas mixture by adsorption, including at least one adsorber having at least one cluster of N identical adsorbent modules operating in parallel, where N?2, each cluster of N adsorbent modules includes a common inlet manifold having a straight inlet duct of axis Xe supplying N inlet nozzles Tei, where i ranges from 1 to N, respectively connected to the inlets Ei, where i ranges from 1 to N, of the N modules of the cluster, a common outlet manifold having a straight outlet duct of axis Xs collecting the flow leaving the N outlet nozzles Tsi, where i ranges from 1 to N, respectively connected to the outlets Si, where i ranges from 1, of the N modules of the cluster.

Abstract: A method for producing oxygen from air using vacuum swing adsorption by means of a unit including at least two adsorbers each following, with an offset a pressure cycle, with a decompression step including at least a co-current first decompression sub-step for the partial balancing of pressure with the other adsorber which is performing counter-current recompression by means of a balancing valve, and, at least for one cycle out of three, a dead time sub-step which succeeds the first decompression sub-step, the method including a pressure of X bar at the end of the first decompression sub-step for the cycles that do not have a dead time sub-step, and a pressure of X bar at the end of the dead time sub-step, opening the balancing valve identically during the first decompression sub-step and the dead time sub-step, for the cycles that do have a dead time sub-step.

Abstract: An adsorber for purifying or separating a gas stream, wherein a granular-material filling system is made up of a cylinder that is perforated over all or part of its height, of the top end thereof of diameter Dext, and of the bottom end thereof. The distance Din-Dext is greater than twice the size of particles of the second granular material. A first granular material and the second granular material follow one another in the direction of circulation of the gas stream and are such that M>ADN. And, the second granular material is in contact both with at least a part of the outer surface of the granular-material filling system and at least a part of the inner surface of the domed top end.

Abstract: The invention relates to a method for regulating a unit for separating a gas stream, having P adsorbers, where P?2, each following a PSA-type adsorption cycle with a phase time shift, the method involving the steps of operating the unit according to the nominal cycle when the required flow rate is equal to a nominal flow rate or optionally when the required flow rate is higher than the nominal flow rate, and operating the unit according to the reduced cycle when the required flow rate is lower than or equal to a predetermined flow rate, the predetermined flow rate being lower than the nominal flow rate.

Abstract: Process for conditioning a container including a granular material A enabling the adsorption of the nitrogen contained in a feed gas stream, including a step of injecting, into the container, a gas or a gas mixture G such that the adsorption capacity of the material A with respect to G is less than 10 Ncm3/g at 25° C. and 1 atm.

Abstract: A process for separating carbon dioxide from a waste gas of a fluid catalytic cracking installation including converting at least a portion of the carbon monoxide of the waste gas into carbon dioxide to form a flow enriched in carbon dioxide, separating at least a portion of the flow enriched in carbon dioxide to form a gas enriched in carbon dioxide and depleted in nitrogen and a gas rich in nitrogen and depleted in carbon dioxide, and at least a portion of the gas enriched in carbon dioxide and depleted in nitrogen is separated by way of separation at a temperature of less than 0° C. to form a fluid rich in carbon dioxide and a fluid depleted in carbon dioxide and sending a gas containing at least 90% oxygen to combustion.

Abstract: In a process for separating carbon dioxide from a waste gas (3) of a fluid bed catalytic cracking installation (1) containing carbon dioxide, nitrogen and possibly carbon monoxide, the waste gas (3) is separated by adsorption to form a gas enriched in carbon dioxide and depleted in nitrogen (29) and a gas rich in nitrogen and depleted in carbon dioxide (31), and at least a portion of the gas enriched in carbon dioxide and depleted in nitrogen is separated in a separation device (30) by way of separation at a temperature of less than 0° C. by partial condensation and/or by distillation to form a fluid rich in carbon dioxide (35) and a fluid depleted in carbon dioxide (37).

Abstract: A process for purifying a feed gas stream containing at least 90% of CO2, at least 20% RH and at least one impurity chosen from chlorinated, sulfur-bearing, nitrated or fluorinated compounds is provided. The process includes a) subjecting the feed gas stream to catalytic oxidation producing a stream containing at least one of HCl, NOx, SOx or hydrofluoric acid; b) maintaining the temperature of the gas stream above the highest value between the dew points of water and the acid(s) contained in the gas; c) removing at least a part of the acid impurities by bringing the gas stream into contact with a corrosion-resistant heat exchanger to condense the acid compounds while regulating the temperature of the gas stream exiting below the dew point of water; and d) separating the acid condensates with a corrosion-resistant separator in such a way as to produce a CO2-enriched gas stream.

Abstract: In a process for separating carbon dioxide from a waste gas (3) of a fluid bed catalytic cracking installation (1) containing carbon dioxide, nitrogen and possibly carbon monoxide, the waste gas (3) is separated by adsorption to form a gas enriched in carbon dioxide and depleted in nitrogen (29) and a gas rich in nitrogen and depleted in carbon dioxide (31), and at least a portion of the gas enriched in carbon dioxide and depleted in nitrogen is separated in a separation device (30) by way of separation at a temperature of less than 0° C. by partial condensation and/or by distillation to form a fluid rich in carbon dioxide (35) and a fluid depleted in carbon dioxide (37).

Abstract: A method for producing oxygen from air using vacuum swing adsorption by means of a unit comprising at least two adsorbers each following, with an offset a pressure cycle, with a decompression step comprising at least a co-current first decompression sub-step for the partial balancing of pressure with the other adsorber which is performing counter-current recompression by means of a balancing valve, and, at least for one cycle out of three, a dead time sub-step which succeeds the first decompression sub-step, the method including a pressure of X bar at the end of the first decompression sub-step for the cycles that do not have a dead time sub-step, and a pressure of X bar at the end of the dead time sub-step, opening the balancing valve identically during the first decompression sub-step and the dead time sub-step, for the cycles that do have a dead time sub-step.

Abstract: A unit for purifying a gas mixture by adsorption, including at least one adsorber having at least one cluster of N identical adsorbent modules operating in parallel, where N?2, each cluster of N adsorbent modules includes a common inlet manifold having a straight inlet duct of axis Xe supplying N inlet nozzles Tei, where i ranges from 1 to N, respectively connected to the inlets Ei, where i ranges from 1 to N, of the N modules of the cluster, a common outlet manifold having a straight outlet duct of axis Xs collecting the flow leaving the N outlet nozzles Tsi, where i ranges from 1 to N, respectively connected to the outlets Si, where i ranges from 1, of the N modules of the cluster.

Abstract: An adsorber for purifying or separating a gas stream, wherein a granular-material filling system is made up of a cylinder that is perforated over all or part of its height, of the top end thereof of diameter Dext, and of the bottom end thereof. The distance Din-Dext is greater than twice the size of particles of the second granular material. A first granular material and the second granular material follow one another in the direction of circulation of the gas stream and are such that M>ADN. And, the second granular material is in contact both with at least a part of the outer surface of the granular-material filling system and at least a part of the inner surface of the domed top end.

Abstract: A process for purifying a feed gas stream containing at least 90% of CO2, at least 20% RH and at least one impurity chosen from chlorinated, sulfur-bearing, nitrated or fluorinated compounds is provided. The process includes a) subjecting the feed gas stream to catalytic oxidation producing a stream containing at least one of HCl, NOx, SOx or hydrofluoric acid; b) maintaining the temperature of the gas stream above the highest value between the dew points of water and the acid(s) contained in the gas; c) removing at least a part of the acid impurities by bringing the gas stream into contact with a corrosion-resistant heat exchanger to condense the acid compounds while regulating the temperature of the gas stream exiting below the dew point of water; and d) separating the acid condensates with a corrosion-resistant separator in such a way as to produce a CO2-enriched gas stream.

Abstract: Process for conditioning a container including a granular material A enabling the adsorption of the nitrogen contained in a feed gas stream, including a step of injecting, into the container, a gas or a gas mixture G such that the adsorption capacity of the material A with respect to G is less than 10 Ncm3/g at 25° C. and 1 atm.

Abstract: A method for producing oxygen by adsorbing a stream of atmospheric air, using four VPSA, one air compressor and two vacuum pumps, each adsorber undergoing a single pressure cycle including the following steps: a) producing a first stream of gas having an oxygen content T1 while loading the adsorber of the stream of atmospheric air upstream; b) producing a second stream of gas including an oxygen content T2<T1: c) producing a third stream of gas including an oxygen content T3<T2<T1 while simultaneously extracting a nitrogen-enriched residual stream; d) eluting the adsorber, from which the three streams of gas produced in steps a), b), and c) are taken with the second stream of gas produced in step b); e) repressurizing the adsorber consecutively with at least two streams, first and second repressurizing streams, with increasing oxygen content.

Abstract: A (V)PSA unit for purifying a gas stream by adsorption is provided. The (V)PSA unit comprises, arranged successively in the direction of flow of the feed gas stream, a rotary-structured adsorbent wheel configured so as to drive the gas stream therethrough in an axial manner and allowing the feed gas to dry to a level corresponding to a dew point below ?30 C., and an adsorber with a centripetal radial configuration, comprising a bed of particulate adsorbent.

Abstract: A method for producing oxygen by adsorbing a stream of atmospheric air, using a VPSA, including at least one adsorber, each adsorber undergoing a single pressure cycle including the following steps: a) producing a first stream of gas having an oxygen content T1 while loading the adsorber of the stream of atmospheric air upstream; b) producing a second stream of gas including an oxygen content T2<T1: c) producing a third stream of gas including an oxygen content T3<T2<T1 while simultaneously extracting a nitrogen-enriched residual stream; d) eluting the adsorber, from which the three streams of gas produced in steps a), b), and c) are taken with the second stream of gas produced in step b); e) repressurizing the adsorber consecutively with at least two streams, first and second repressurizing streams, with increasing oxygen content.

Abstract: A method for producing oxygen by adsorbing a stream of atmospheric air, using four VPSA, one air compressor and two vacuum pumps, each adsorber undergoing a single pressure cycle including the following steps: a) producing a first stream of gas having an oxygen content T1 while loading the adsorber of the stream of atmospheric air upstream; b) producing a second stream of gas including an oxygen content T2<T1: c) producing a third stream of gas including an oxygen content T3<T2<T1 while simultaneously extracting a nitrogen-enriched residual stream; d) eluting the adsorber, from which the three streams of gas produced in steps a), b), and c) are taken with the second stream of gas produced in step b); e) repressurizing the adsorber consecutively with at least two streams, first and second repressurizing streams, with increasing oxygen content.

Abstract: Adsorbent layer for adsorbing a fluid, comprising at least two adjacent modules of structured adsorbent, arranged in parallel in the direction of circulation of the fluid, characterized in that at least one of the two facing surfaces of the two adjacent modules is an adsorbent surface.

Abstract: A (V)PSA unit for purifying a gas stream by adsorption is provided. The (V)PSA unit comprises, arranged successively in the direction of flow of the feed gas stream, a rotary-structured adsorbent wheel configured so as to drive the gas stream therethrough in an axial manner and allowing the feed gas to dry to a level corresponding to a dew point below ?30 C, and an adsorber with a centripetal radial configuration, comprising a bed of particulate adsorbent.