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

L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

Golo Zick

Sudhir S Kulkarni

Jean-Marc Chareyre

Veronique Grabie

Jean-Pierre Tranier

Denis Clodic

Fabrice Delcorso

Fabien Durand

Jean-Marc Bernhardt

David J Hasse

Philippe Fraysse

Pierre Barjhoux

Rachid Makhlouche

Nicolas Paget

Guénaël Prince

Solène Valentin

Fabrice Del Corso

Martin Staempflin

Delphine Garnaud

Véronique Grabie

Robin Ladous

Rémi Nicolas

Camille Bouvier

Sarah Bigeard

Edgar Sanders

Romain Loeb

François Barraud

Disclosed is a method for purifying a main gas, in particular helium, from a source gas stream comprising the main gas, a main impurity, in particular nitrogen, and optionally another, secondary impurity, in particular oxygen, the method comprising a step of partial condensation of the gas stream in order to extract therefrom impurities in liquid form, in particular the main impurity, and to produce a gas stream enriched with main gas, characterized in that the method comprises, before the partial condensation step, a step of injecting into the gas stream a compound in which the main impurity of the gas to be treated is soluble and having a saturation vapor pressure lower than the saturation vapor pressure of the main impurity.

Gas purification method and device

An installation and method for purifying and liquefying natural gas having, arranged in series, an adsorption purification unit, a unit for separating hydrocarbons by refrigeration, and a liquefier. The installation has a gas power plant for combined production of heat and electricity by hydrocarbon combustion. The installation has at least one electrical member, with the power plant being electrically connected to at least one of the electrical members in order to supply them with electrical energy.

Installation and method for purifying and liquefying natural gas

A gas stream is purified by a TSA adsorption scheme including at least two adsorbers following, in an offset manner, a cycle including an adsorption phase, and a subsequently, a regeneration phase. The regeneration phase includes a depressurization step, a pre-regeneration step and a regeneration step. A gas circulator is used to circulate the gas within the adsorber in the pre-regeneration step in a closed loop while the circulating gas is heated with a heater.

Gas stream purification by adsorption with pre-regeneration in a closed loop

A facility and method for membrane permeation treatment of a feed gas flow containing at least methane and carbon dioxide that includes a compressor, a pressure measurement device, at least one valve, and first, second, third, and fourth membrane separation units for separation of COfrom CHto permeates enriched in COand retentates enriched in CH, respectively. The at least one valve adjusts the number of membranes combined and connected to the flow of gas entering into at least one of the membrane separation units as a function of the pressure recorded by the pressure measurement device.

Membrane permeation treatment with adjustment of the number of membranes used as a function of the pressure of the feed gas flow

A facility and method for membrane permeation treatment of a feed gas flow containing at least methane and carbon dioxide that includes a compressor, a pressure measurement device, at least one valve, and first, second, third, and fourth membrane separation units for separation of COfrom CHto permeates enriched in COand retentates enriched in CH, respectively. A temperature of the first retentate is adjusted at an inlet of the second membrane separation unit with at least one heat exchanger as a function of the measured CHconcentration in such a way so as to reduce the determined difference.

Membrane permeation treatment with adjustment of the temperature of the first retentate as a function of the CHconcentration in the third and/or fourth permeate

A facility and method for membrane permeation treatment of a feed gas flow containing at least methane and carbon dioxide that includes a compressor, a gas analyser, at least one valve, and first, second, third, and fourth membrane separation units for separation of COfrom CHto permeates enriched in COand retentates enriched in CH, respectively. A pressure of the feed gas flow is adjusted according to a CHconcentration of the second retentate.

Method to control the extraction rate in a membrane based biogas upgrading plant

Membrane permeation treatment with adjustment of the temperature of the first retentate as a function of the CH4 concentration in the third and/or fourth permeate

A cryogenic installation unit comprises at least one item of equipment to be thermally insulated, a structure for containing the at least one item of equipment, a main insulation contained in the structure and, associated with this main insulation, a secondary insulation of lower thermal conductivity than the main insulation, said secondary insulation consisting of a vacuum insulation panel.

Cryogenic distillation comprising vacuum insulation panel

Device and method for purifying a gas mixture to produce a concentrated gas, notably neon, starting from a mixture comprising neon, said device including, in a cold box housing a cryogenic purification circuit comprising, in series, at least one unit for purifying the mixture by cryogenic adsorption at a temperature between 65K and 100K and notably 65K, then a unit for cooling the mixture to a temperature between 25 and 65 K and then a unit for cryogenic distillation of the mixture to produce the concentrated liquid at the outlet of the cryogenic distillation unit, characterized in that the unit for cooling the mixture to a temperature between 25 and 65 K comprises at least one cryocooler that extracts thermal power from the mixture via a heat exchanger.

Device and method for purifying a gas mixture

In a process for the cryogenic separation of a methane-rich feed stream containing between 3 and 35% of oxygen and also nitrogen, the feed stream is cooled in order to produce a cooled stream, at least one portion of the cooled stream is sent to a distillation column, a bottom stream is withdrawn from the distillation column, the bottom stream being enriched in methane compared to the feed stream, a stream enriched in oxygen compared to the feed stream is withdrawn from the distillation column, and a nitrogen-rich stream is sent to the column.

Process and device for the cryogenic separation of a methane-rich stream

A four-stage membrane separation unit purification process, especially for prepurified biogas, in which a retentate from the first stage is fed as feed gas to a second stage, a permeate from the first stage is fed as feed gas to a third stage, a retentate from the third stage is fed as feed gas to a fourth stage.

Method for the final purification of biogas for producing biomethane

The invention relates to a method producing a portioned column by forming a first segment and a third segment into arcuate segments, and attaching these arcuate segments to a second z-shaped segment to from two contiguous volumes with approximately semi-circular cross-sections that combine to form a partitioned, approximately cylindrical segment.

Method for fabricating divided wall columns

A cryogenic installation unit comprises at least one item of equipment (A toH,) to be thermally insulated, a structure () for containing the at least one item of equipment, a main insulation () contained in the structure and, associated with this main insulation, a secondary insulation () of lower thermal conductivity than the main insulation, said secondary insulation () consisting of a vacuum insulation panel.

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Fontaine, France

Golo Zick