L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Guillaume Rodrigues

Christian Monereau

Maxime Perez

Patrick Le Bot

Benjamin Morineau

Louis Toulemonde

Pierre Petit

Richard Dubettier-Grenier

Etienne Werlen

Vincent Gueret

Yudong Chen

Pierre-Philippe Guerif

Trapti Chaubey

Pluton Pullumbi

Simon Jallais

Philippe Arpentinier

Bernard Fraioli

Ingrid Bellec

François Lagoutte

Laurent Perru

Clément Lix

Aurélien Franco

François Demoisy

Patrick Pereira

Stéphane Pusiol

Rémi Jabes

François Darrigade

Richard Dubettier-grenier

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.

Method for regulating a unit for separating a gas stream

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.

Adsorber with at least one cluster comprising a plurality of adsorbent modules

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.

Method for producing oxygen via O2 VSA, minimizing valve openings and closings

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&#x3e;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.

Adsorber for purifying or separating a gas stream comprising a removable filling system

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 Ncm/g at 25&#xb0; C. and 1 atm.

Process for conditioning a container comprising a granular material

In a process for separating carbon dioxide from a waste gas () of a fluid bed catalytic cracking installation () containing carbon dioxide, nitrogen and possibly carbon monoxide, the waste gas () is separated by adsorption 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 in a separation device () by way of separation at a temperature of less than 0&#xb0; C. by partial condensation and/or by distillation to form a fluid rich in carbon dioxide () and a fluid depleted in carbon dioxide ().

Process and apparatus for separating carbon dioxide from a waste gas of a fluid bed catalytic cracking (FCC) installation

A process for purifying a feed gas stream containing at least 90% of CO, 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 CO-enriched gas stream.

Method and facility for purifying a feed gas stream comprising at least 90% CO2

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&#x3c;T1: c) producing a third stream of gas including an oxygen content T3&#x3c;T2&#x3c;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.

Method for producing oxygen by VPSA comprising four adsorbers

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 &#x2212;30 C., and an adsorber with a centripetal radial configuration, comprising a bed of particulate adsorbent.

Adsorber with rotary dryer

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&#x3c;T1: c) producing a third stream of gas including an oxygen content T3&#x3c;T2&#x3c;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.

Method for producing oxygen by VPSA

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.

Assembly of structured adsorbent modules

Installation for treating a fluid comprising, in a section of a horizontal shell ring () a first particulate material filling a volume (V), a deflector comprising 2 volumes Vdelimited by the internal shell of the shell ring and on the other hand by lower surfaces Sand Smaking with a horizontal plane an angle (&#x3b1;) greater than the angle of repose of the first particulate material, a volume (V) formed of a membrane backing up against the two volumes (V) of the deflector over the entire length of the section of the shell ring, and of a second particulate material with which the volume (V) is filled; the second particulate material being contained in the space formed by the membrane and the internal shell of the shell ring, the volumes Vand Vbeing situated in the upper half of the cross section of the horizontal shell ring.

Adsorber with horizontal axial bed and clearing system of packing

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 (H) and carbon monoxide (CO) using a heater having a skin temperature (T) of between 150&#xb0; C. and 200&#xb0; 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 (T) such that: T=T&#x2212;&#x394;T with 5&#xb0; C.&#x3c;&#x394;T&#x3c;50&#xb0; C.

[object Object]

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.

Limiting of impurity peaks

The present invention provides a process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by FTS reactions in a syngas treatment unit by utilizing heat exchangers and optionally associated pipes that are substantially fabricated of a metal material selected from the group consisting of iron, nickel, cobalt, carbon steel or stainless steel and having deposited on the metal surfaces that will come in contact with the coldbox overhead gas stream an inert coating selected from the group consisting of silicon based materials, zinc based materials, tin based materials, chromium based materials, polymers, ceramics and mixtures thereof for heating up gas streams having a mixture of hydrogen and carbon monoxide and obtained from a front end purification unit/cold box unit.

Process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by Fisher Tropsch Synthesis reactions in a syngas treatment unit

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Guyancourt, France

Guillaume Rodrigues