Abstract: A method for operating a temperature swing adsorption plant having three adsorption units which are operated in an adsorption phase, a feed phase, a regeneration phase, a flush phase, and a cooling phase, wherein in the adsorption phase a first gas mixture at a first temperature is guided over an adsorbent in the adsorption units with obtention of a second gas mixture and adsorption onto the adsorbent of components of the first gas mixture, in the regeneration phase the adsorption units are heated and the components adsorbed by the adsorbent during the adsorption mode are at least partially desorbed, and in the flush phase the components which were desorbed during the regeneration mode are at least partially flushed using a third gas mixture with obtention of a fourth gas mixture. In the cooling phase, the adsorption units are at least partially cooled to the first temperature.

Abstract: A method for separating a gas mixture flow, n which uses a temperature-change adsorption plant having a number of adsorption units which are operated in a first and a second operating mode. The first operating mode comprises guiding a gas mixture flow at least in part through an adsorption chamber of an adsorption unit and subjecting this flow to an adsorptive exchange with at least one adsorbent. The second operating mode comprises guiding a first heat transfer fluid flow at a first temperature through a heat-exchange arrangement of an adsorption unit. The first operating mode also comprises guiding a second heat transfer fluid flow at a second temperature through the heat-exchange arrangement of the respective adsorption unit. The adsorption units are operated in a third operating mode which comprises guiding a third heat transfer fluid flow at a third temperature through the heat-exchange arrangement of the respective adsorption unit.

Abstract: A process for removal of unwanted components from a feed gas mixture, wherein a temperature swing adsorption unit comprising at least two adsorption vessels is used, the method comprising cyclically operating the temperature swing adsorption unit in successive operation modes in each of which a different one of the at least two adsorption vessels is operated in an adsorption mode while a further one of the at least two adsorption vessels previously operated in the adsorption mode is operated in a regeneration mode, the adsorption mode comprising forming an adsorption gas stream using a part of the feed gas mixture and passing the adsorption gas stream through the adsorption vessel operated in the adsorption mode, and the regeneration mode comprising passing a regeneration gas stream through the adsorption vessel operated in the regeneration mode, thereby forming the purified gas mixture.

Abstract: A process is proposed for separating carbon dioxide from a feed stream containing carbon dioxide, in which at least part of the feed stream is subjected to temperature swing adsorption to obtain a first and a second successive stream, wherein, in each case relative to the feed stream, the first subsequent stream is depleted in carbon dioxide and the second subsequent stream is enriched in carbon dioxide, and at least part of the second subsequent stream is subjected to membrane separation to obtain a third and a fourth subsequent stream, the third subsequent stream being depleted in carbon dioxide and the fourth subsequent stream being enriched in carbon dioxide, in each case relative to the second subsequent stream. A corresponding arrangement is also an object of the invention.

Abstract: A method for recovering helium from a feed gas mixture comprising helium, carbon dioxide and at least one of methane and nitrogen, and wherein at least a part of the feed gas mixture is subjected to a separation sequence including a membrane-based separation and an adsorption-based separation forming a helium product, wherein the the membrane based separation is performed using a first membrane separation step and a second membrane separation step, the membrane based separation and the separation sequence includes no further membrane separation steps, the adsorption based separation is performed using a pressure swing adsorption step, at least a part of the feed gas mixture is subjected to the first membrane separation step forming a first retentate and a first permeate. A corresponding arrangement is also provided.

Abstract: The invention relates to a method for obtaining natural gas components, wherein, using natural gas, a feed mixture containing methane and helium is provided and subjected to a separating sequence so as to obtain a natural gas product which is enriched with methane and depleted of helium in comparison to the feed mixture and a helium product which is depleted of methane and enriched with helium in comparison to the feed mixture, which method comprises one or more membrane separating steps and one or more pressure change adsorption steps. According to the invention, the feed mixture is provided using natural gas containing methane, higher hydrocarbons, helium and carbon dioxide, and the providing of the feed mixture comprises depleting the natural gas used for provision of the feed mixture of carbon dioxide and of the higher hydrocarbons. The present invention also relates to a corresponding system.

Abstract: A method for operating a temperature swing adsorption plant having three adsorption units which are operated in an adsorption phase, a feed phase, a regeneration phase, a flush phase, and a cooling phase, wherein in the adsorption phase a first gas mixture at a first temperature is guided over an adsorbent in the adsorption units with obtention of a second gas mixture and adsorption onto the adsorbent of components of the first gas mixture, in the regeneration phase the adsorption units are heated and the components adsorbed by the adsorbent during the adsorption mode are at least partially desorbed, and in the flush phase the components which were desorbed during the regeneration mode are at least partially flushed using a third gas mixture with obtention of a fourth gas mixture. In the cooling phase, the adsorption units are at least partially cooled to the first temperature.

Abstract: The invention relates to a method for separating a gas mixture flow, in which use is made of a temperature-change adsorption plant (100) which has a number of adsorption units (A1, A2, A3) which are respectively operated in a first operating mode and a second operating mode, wherein the first operating mode comprises guiding the gas mixture flow (G) at least in part through an adsorption chamber of the respective adsorption unit (A1, A2, A3) and subjecting this flow to an adsorptive exchange of material with at least one adsorbent in its adsorption chamber, and the second operating mode comprises guiding a first heat transfer fluid flow (W1) at a first temperature through a heat-exchange arrangement of the respective adsorption unit (A1, A2, A3) and transferring heat from the first heat transfer fluid flow (W1) indirectly to the at least one adsorbent in its adsorption chamber.

Abstract: A process for producing and purifying a synthesis gas stream that contains CO- and H2-produced from a hydrocarbon-containing feed in a gas production unit. CO2 is separated from the synthesis gas stream and CO is cryogenically separated from the synthesis gas stream. CO2 that makes up 5% to 30% by volume in the synthesis is reduced to less than 10 ppm by volume by temperature swing adsorption. The temperature swing adsorption takes place upstream of the cryogenic separation of CO. The CO2 is adsorbed using a disordered adsorbent bed wherein the adsorbent is cooled by means of indirect heat transfer from the adsorbent to the heat transfer medium during adsorption and the adsorbent loaded with CO2 is heated by indirect heat transfer from the heat transfer medium to the adsorbent to effect desorption of CO2.

Abstract: A method for producing urea. A methane-containing feed gas stream is reacted with oxygen by partial oxidation to form a synthesis gas stream containing hydrogen and carbon monoxide. The carbon monoxide is reacted with water in a water gas-shift reaction to form carbon dioxide and hydrogen. The synthesis gas stream is separated into a first synthesis gas substream a second synthesis gas substream. The first synthesis gas substream is subjected to pressure-swing adsorption to separate hydrogen and the second synthesis gas substream is subjected to temperature-swing adsorption to separate carbon dioxide. The separated is reacted with nitrogen to form ammonia and the ammonia is reacted with the carbon dioxide to form urea.

Abstract: A process for producing and purifying a synthesis gas stream that contains CO- and H2-produced from a hydrocarbon-containing feed in a gas production unit, CO2 is separated from the synthesis gas stream and CO is cryogenically separated from the synthesis gas stream. CO2 that makes up 5% to 30% by volume in the synthesis is reduced to less than 10 ppm by volume by temperature swing adsorption. The temperature swing adsorption takes place upstream of the cryogenic separation of CO. The CO2 is adsorbed using a disordered adsorbent bed wherein the adsorbent is cooled by means of indirect heat transfer from the adsorbent to the heat transfer medium during adsorption and the adsorbent loaded with CO2 is heated by indirect heat transfer from the heat transfer medium to the adsorbent to effect desorption of CO2.