Abstract: A process for the production of a gas stream with a hydrogen concentration equal to or greater than 99.9% utilizing a pressure swing adsorption unit with a main gas stream having at least 70 mol % of hydrogen, wherein a secondary stream, representing less than 20% of the molar flow rate of the main gas stream and having a hydrogen content of less than 25 mol %, is introduced into the main gas stream upstream of the PSA is presented.

Abstract: A composite adsorbent mixture is provided, including at least one adsorbent active principle in the form of microparticles and a non-adsorbent thermal principle in the form of microparticles, where the characteristic mean size Di of the microparticles of the thermal principle is smaller than the characteristic mean size Da of the microparticles of the active principle.

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: Oxygen production process of VSA type from a flow of air, implementing at least one group of at least 3 adsorbers installed in parallel and following the same VSA cycle comprising, in succession, a phase of adsorption at the high pressure of the cycle, a phase of desorption at pressures lower than the high pressure of the cycle, a phase of repressurization of the adsorber to the high pressure of the cycle, characterized in that, periodically or exceptionally: a) at least one adsorber of the group of adsorbers is isolated so as to no longer follow the pressure cycle, b) the adsorbent contained in the adsorber isolated in the step a) is regenerated by raising the temperature, and c) the adsorber regenerated in the step b) is re-incorporated in the group of adsorbers so as to once again follow the pressure cycle.

Abstract: A pressure swing adsorption process for producing a gas stream enriched in a compound X from a feed gas stream is provided. The process includes at least 2 adsorbers, with each adsorber being subjected to a pressure cycle having a high pressure and a low pressure. The process includes adsorption at the high pressure with production of the gas stream enriched in compound X; then depressurization; then elution at the low pressure; and finally repressurization to the high pressure. The elution gas is made up fractions of gas stream resulting from the depressurization of an adsorber and the gas stream enriched in compound X. The pressure cycle has a phase time corresponding to the duration of a pressure cycle divided by the number of adsorbers and the fraction of the gas stream enriched in compound X is determined as a function of the phase time.

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 pressure swing adsorption process for producing a gas stream enriched in a compound X from a feed gas stream is provided. The process includes at least 2 adsorbers, with each adsorber being subjected to a pressure cycle having a high pressure and a low pressure. The process includes adsorption at the high pressure with production of the gas stream enriched in compound X, depressurization to the low pressure with production of at least one portion of an elution gas, c) elution at the low pressure, and repressurization to the high pressure. The pressure cycle has a phase time corresponding to the duration of a pressure cycle divided by the number of adsorbers. The pressure of the pressure cycle is modified to keep the phase time of the PSA equal to or within ±5% of the nominal phase time.

Abstract: A plant for purifying a gas stream comprising at least 0.02% by volume of water, CO2 and NOx, comprising an adsorber characterized by: a cavity (1); an adsorbent (2) included in the cavity (1); an outer casing (3) made of carbon steel; an inner casing (4) made of stainless steel making a space having a width of between 10 and 100 mm between said inner casing and the outer casing, said space being at equal pressure with the cavity.

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: The invention relates to a facility for purification by adsorption of gaseous flow comprising at least one impurity which has a corrosive effect on carbons steel, comprising a radial adsorber comprising a housing with an outer envelope made of carbon steel; a vertical perforated inner grating consisting of a corrosion-resistant material, a vertical perforated outer grating, an adsorbent which is held vertically by the outer grating and the inner grating, and allows at least partial blockage of the corrosive impurity, and a means for allowing a centrifugal circulation of the gaseous flow.

Abstract: Pressure shift adsorption (PSA) process for producing a gas stream enriched with compound X from a feed gas stream, using N adsorbers with N?5, each adsorber being subjected to a pressure cycle having a phase time corresponding to the duration of the pressure cycle divided by the number of adsorbers, and a series of active steps, characterized in that each adsorber n follows the pressure cycle with an offset of one phase time with respect to the pressure cycle of the adsorber n?1 with n?N, and during each phase time, only one active step or a part of active step takes place.

Abstract: A pressure swing adsorption process for producing a gas stream enriched in a compound X from a feed gas stream is provided. The process includes at least 2 adsorbers, with each adsorber being subjected to a pressure cycle having a high pressure and a low pressure. The process includes adsorption at the high pressure with production of the gas stream enriched in compound X, depressurization to the low pressure with production of at least one portion of an elution gas, c) elution at the low pressure by means of the elution gas, and repressurization to the high pressure. The pressure cycle has a phase time corresponding to the duration of a pressure cycle divided by the number of adsorbers. The pressure of the pressure cycle is modified to keep the phase time of the PSA equal to or within ±5% of the nominal phase time.

Abstract: A pressure swing adsorption process for producing a gas stream enriched in a compound X from a feed gas stream is provided. The process includes at least 2 adsorbers, with each adsorber being subjected to a pressure cycle having a high pressure and a low pressure. The process includes adsorption at the high pressure with production of the gas stream enriched in compound X; then depressurization; then elution at the low pressure; and finally repressurization to the high pressure. The elution gas is made up fractions of gas stream resulting from the depressurization of an adsorber and the gas stream enriched in compound X. The pressure cycle has a phase time corresponding to the duration of a pressure cycle divided by the number of adsorbers and the fraction of the gas stream enriched in compound X is determined as a function of the phase time.

Abstract: TSA method for purification by means of adsorption of a synthetic gas including hydrogen, CO and/or methane, implementing at least one adsorber having at least one adsorbent and subjected to a pressure cycle comprising at least an adsorption step, a step of producing a flow enriched with a main component and a regeneration step, characterized in that the regeneration step includes: regenerating the adsorbent using a regeneration gas including more than 95 mol of nitrogen; and scavenging the adsorbent using a scavenging gas corresponding to a fraction of the synthetic gas to be purified or a fraction of the purified synthetic gas.

Abstract: A Temperature Swing Adsorption method for separating a first component, comprising a more adsorbable component, from a feed stream comprising more than 50 mol % of a second component, comprising a less adsorbable component, is provided. The method includes providing an adsorbent structure suitable for adsorbing the first component, the structure being of the parallel passage contactor type, and cyclically implementing the following steps. Passing the feed stream through the adsorbent structure thus adsorbing the first component and producing a stream depleted in the first component and enriched in the second component. Heating the adsorbent structure to desorb the adsorbed first component by means of circulating a heating stream enriched in the first component at a temperature suitable for regeneration. And cooling the structure by means of passing through it more than 50% of the stream enriched in the second component produced in the step a).

Abstract: Agglomerate comprising a first phase change material (PCM) and a constituent having a density greater than 800 kg/m3 and forming the core of said agglomerate.

Abstract: A structured adsorbent sheet, is provided including a nano-adsorbent powder, and a binder material, wherein the nano-adsorbent powder is combined with the binder material to form an adsorbent material, and a porous electrical heating substrate, wherein the adsorbent material is applied to the porous electrical heating substrate thereby forming a structured adsorbent sheet. A structured adsorbent module is provided, including a plurality of stacked structured adsorbent sheets, configured to produce a plurality of fluid passages, wherein the plurality of fluid passages have a cross-sectional shape in the direction of a fluid stream. The structured adsorbent module may have a cross-sectional shape that is trapezoidal, rectangle, square, triangular or sinusoidal.

Abstract: A Temperature Swing Adsorption method for separating a first component, comprising a more adsorbable component, from a feed stream comprising more than 50 mol % of a second component, comprising a less adsorbable component, is provided. The method includes providing an adsorbent structure suitable for adsorbing the first component, the structure being of the parallel passage contactor type, and cyclically implementing the following steps. Passing the feed stream through the adsorbent structure thus adsorbing the first component and producing a stream depleted in the first component and enriched in the second component. Heating the adsorbent structure to desorb the adsorbed first component by means of circulating a heating stream enriched in the first component at a temperature suitable for regeneration. And cooling the structure by means of passing through it more than 50% of the stream enriched in the second component produced in the step a).

Abstract: The invention relates to an adsorbent zeolite-based material comprising for 100 mass %: an amount different from zero of a zeolite selected from X zeolites or LSX zeolites; the balance up to 100 mass % consisting of an amount different from zero of a cation-exchanged zeolite, said cation-exchanged zeolite being selected from cation-exchanged X zeolites and cation-exchanged LSX zeolites.

Abstract: This present invention provides a method to more efficiently recover hydrogen and carbon dioxide, preferably at least 50%, even more preferably at least 80% and most preferably at least 90% of the carbon dioxide. The proposed use combines hydrogen selective membranes and carbon dioxide selective membranes together with carbon dioxide separation units such that hydrogen and carbon dioxide are produced with increased recoveries and improved process efficiency.