Abstract: A method for purifying or separating a gas mixture comprising at least one fuel, using a unit having at least one adsorber subjected to a pressure cycle comprising at least one step of placing under vacuum by means of a vacuum pump, wherein at least one adsorber and/or the vacuum pump, depressurized during the cycle, is repressurized at least partly by an external gas to said unit and not containing a sufficient quantity of oxidizer to create an inflammable mixture during this repressurization.

Abstract: A process for gas purification or separation intended to produce a gas mixture containing mainly hydrogen and, to a minor extent CO, it being imperative for the CO content to remain below a set value is presented. This invention particularly relates to adsorption processes and even more particularly to processes of the PSA (“Pressure Swing Adsorption”) type.

Abstract: A method of purifying or separating a gas using a number of adsorbers on phase-shifted cycles, and more particularly to the purification of atmospheric air, prior to cryogenic separation of the said air by cryogenic distillation is provided. More specifically still, it relates to the purification of air with a TSA cycle using radial adsorbers.

Abstract: A thermocyclic process having a short cycle time, typically a cycle time of less 30 minutes, especially a PSA (Pressure Swing Adsorption) process, using agglomerates that contain phase change materials (PCMs), so as to reduce the thermal effects that said thermocyclic process is subjected to during each cycle is provide.

Abstract: The invention relates to a method for purifying or separating a supply gas flow containing at least one impurity, in which: a) said supply gas flow is contacted with a first adsorbent for the adsorption-removal of at least one said impurity; b) recovering said purified or separated gas; c) heating a regeneration gas containing at least hydrogen (H2) and carbon monoxide (CO) using a heater having a skin temperature (T1) of between 150° C. and 200° C. during the gas heating phase; and d) periodically regenerating the adsorbent of step a) with the regeneration gas heated during step c) at a regeneration temperature (T2) such that: T2=T1??T with 5° C.<?T<50° C.

Abstract: A method of purifying a gaseous mixture rich in hydrogen and in carbon monoxide, commonly termed an H2/CO mixture or syngas, by adsorption prior to treating it cryogenically with a view to producing a CO-rich fraction, and/or one or more H2/CO mixtures of determined content, such as a mixture of 50 mol % H2/50 mol % CO and generally a hydrogen-rich fraction is provided.

Abstract: In a PSA separation method with compression (C1, C2) of at least one offgas (3), in case of temporary shutdown of one of the compressors (C1, C2), the operating parameters of the PSA unit (S) are changed to increase the outlet pressure of the offgas (3), in order to maintain a production level above 50% with a single compressor (C1).

Abstract: A feedstock hydrogen-enriched gas (3) is supplied to a PSA purification unit (1) which delivers pure hydrogen at a production output (4) and a hydrogen-deficient gas at a residual output. Said hydrogen-deficient gas is compressed (9) and injected into a line (10) wherein a gaseous combustible mixture circulates whose part (12) is extracted upstream of the PSA unit (1), compressed (13) and reinjected into said feedstock of the PSA unit (1). Said invention is used, in particular for petrochemical sites.

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

Abstract: An industrial unit (1) comprises internal parts (3, 4, 5) placed in a chamber (2, 8, 9) closed at least temporarily by a protective end (8, 9), the internal parts being connected to the atmosphere outside the chamber essentially via at least one line (6) allowing the passage of air from the exterior to the internal parts and from the internal parts to the exterior, the line containing at least one device (11) for trapping at least one undesirable atmospheric component.

Abstract: The invention concerns a plant comprising a portion wherein the fluid path (I/O) is deflected and equipped with a distributor with, in series in the downstream direction (O), a first zone (5) with distribution passages (orifices 6) and a second zone (3), typically a grid or fine-mesh sieve forming diffusion passages, the first passages (6) having a total cross-section not exceeding 20% of the surface of the distributor and the second passages having a total cross-section more than 40% of the surface of the distributor. The invention is applicable to gas treatment by adsorption.

Abstract: The invention concerns a treatment method which consists in using a pressure swing adsorption treatment unit (16) and causing said treatment unit (16) to follow a nominal operating cycle, based on nominal operating conditions and in order to ensure minimal performances of the feed gas treatment. It further consists in providing at least a pre-programmed auxiliary operating cycle, different from the nominal cycle, and, when the operating conditions differ from the nominal conditions to the extent that the treatment unit (16) no longer achieves its minimal performances, in imposing to the treatment unit (16) to follow the or one of the auxiliary cycles.

Abstract: In a PSA separation method with compression (C1, C2) of at least one offgas (3), in case of temporary shutdown of one of the compressors (C1, C2), the operating parameters of the PSA unit (S) are changed to increase the outlet pressure of the offgas (3), in order to maintain a production level above 50% with a single compressor (C1).

Abstract: The invention relates to a method for prepurifying air by means of adsorption, using two adsorption recipients operating alternately, in parallel, and in a TSA cycle, each recipient containing an adsorbent arranged on a radial adsorption bed, and each adsorption cycle consisting of (a) an adsorption stage during which the impurities are eliminated on the adsorbent at an adsorption temperature (rads), the air crossing the adsorption bed in a centripetal manner; (b) a regeneration stage during which the adsorbent is regenerated by flushing with a regeneration gas at a regeneration temperature (Treg), such as Treg>Tads, in order to desorb the impurities; et (c) an adsorbent cooling stage during which the temperature of the regenerated adsorbent is reduced. The maximum duration (rads) of the adsorption is 120 minutes, preferably between 60 and 120 minutes. The regeneration gas is introduced in such a way that it flushes the bed containing the adsorbent in the centrifugal direction.

Abstract: A feedstock hydrogen-enriched gas (3) is supplied to a PSA purification unit (1) which delivers pure hydrogen at a production output (4) and a hydrogen-deficient gas at a residual output. Said hydrogen-deficient gas is compressed (9) and injected into a line (10) wherein a gaseous combustible mixture circulates whose part (12) is extracted upstream of the PSA unit (1), compressed (13) and reinjected into said feedstock of the PSA unit (1). Said invention is used, in particular for petrochemical sites.

Abstract: The treatment unit comprises N adsorption units, N being greater than or equal to 1, operating on a parametrized cycle split uniformly into at most N phase times. Further more, use is made of a control unit for controlling the treatment unit, designed to modify at least one parameter of the cycle. Each time there is a predicted change in the composition of the feed gas, the control unit is sent a pre-established signal representing this change. The processing unit then processes the signal to determine the parameters of an exceptional operating cycle of the treatment unit which cycle is suited to the predicted change.

Abstract: A method of separating a gas mixture using a permeation membrane unit, wherein the gas mixture, containing primarily hydrogen and carbon monoxide, is first treated to reduce the level of secondary components to lower than 100 molar ppm.

Abstract: The invention concerns a treatment method which consists in using a pressure swing adsorption treatment unit (16) and causing said treatment unit (16) to follow a nominal operating cycle, based on nominal operating conditions and in order to ensure minimal performances of the feed gas treatment. It further consists in providing at least a pre-programmed auxiliary operating cycle, different from the nominal cycle, and, when the operating conditions differ from the nominal conditions to the extent that the treatment unit (16) no longer achieves its minimal performances, in imposing to the treatment unit (16) to follow the or one of the auxiliary cycles.

Abstract: A method for operating a typical cyclic adsorption unit that is easily implemented in both new and existing treatment plants, wherein fluctuations in the stream compositions due to the adsorption and regeneration phase transitions of the cycles are minimized.

Abstract: A method of separating a gas mixture using a permeation membrane unit, wherein the gas mixture, containing primarily hydrogen and carbon monoxide, is first treated to reduce the level of secondary components to lower than 100 molar ppm.