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

L'air Liquide, Societe Anonyme a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

Babcock & Wilcox Power Generation Group, Inc.

Michel Devaux

Jean-Marc Peyron

Richard Dubettier-Grenier

Nicolas Chambron

Alain Guillard

Arthur Darde

Mathieu Leclerc

Sylvain Gerard

Loïc Joly

Alain Briglia

Jean-Pierre Tranier

Benoit Davidian

Sudhir S Kulkarni

Patrick Le Bot

Paul Terrien

Dennis K McDonald

Guillaume Rodrigues

David J Hasse

Pascal Marty

Philippe Grigoletto

Xavier Traversac

Olivier De Cayeux

Christophe Szamlewski

Frederick Lockwood

Philippe Blostein

Alexis Asse

Ingrid Berthaume

Maxime Rozieres

Vianney Meunier

Marie Cognard

Sebastien De Limon

Christophe Szamleski

Benoît Davidian

Petra Pechova

Sébastien De Limon

In a method for separating air by cryogenic distillation using a column system consisting of a higher pressure column operating at a first pressure and a lower pressure column operating at a second pressure, a first air flow constituting between 75% and 98% of the air sent to the column system compressed to a third pressure above the first pressure, is sent to the higher pressure column, a second air flow constituting between 5% and 25% of the air sent to the column system is compressed to a fourth pressure above the second pressure but lower than the third pressure, is sent to the lower pressure column, a third column separates an argon-enriched flow and the air sent to the lower pressure column constitutes between 10% and 25% of the total air sent to the column system.

Method and apparatus for separating air by cryogenic distillation

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 method for producing liquefied natural gas and a stream of liquid nitrogen including step a): producing gaseous nitrogen in an air separation unit; step b): liquefying a stream of natural gas in a natural gas liquefaction unit including a main heat exchanger and a system for producing cold; step c): liquefying the nitrogen stream resulting from step a) in the main exchanger of the natural gas liquefaction unit in parallel with the liquefied natural gas in step b); wherein all the cold necessary for liquefying the stream of nitrogen and for liquefying the natural gas is supplied by the system for producing cold of the natural gas liquefaction unit.

Method for liquefying natural gas and nitrogen

A process comprises a first set of distillation columns and a second set of distillation columns, a low-pressure column of the first set being connected to a column operating at higher pressure of the second set by means of a gas arriving from the top of the column operating at a higher pressure and/or by means of a fluid arriving from the low-pressure column.

Process and apparatus for separating air by cryogenic distillation

The invention relates to a method for treating a mixture in order to separate carbon dioxide and hydrogen from said mixture, in which: i) the mixture is cooled and partially condensed and a first liquid is separated from the rest of the mixture in a first phase separator; ii) a gas from or derived from a gas from the first phase separator is treated in a hydrogen pressure swing adsorption module in order to produce a hydrogen-rich gas and a hydrogen-depleted residual gas; and iii) said hydrogen-depleted residual gas or a gas derived from said depleted gas is cooled and partially condensed and a second liquid is separated from the remaining gas in a second phase separator, separate from the first phase separator, wherein the first and/or second liquid being rich in carbon dioxide. The invention also relates to an installation for implementing such a method.

Treatment method for separating carbon dioxide and hydrogen from a mixture

Blast furnace installation having top gas recycling and process for operating same, in which the oxygen concentration of the oxidizing gas injected into the blast furnace is regulated as a function of the flow rate of the recycled top gas.

Process for operating a blast furnace installation with top gas recycling

In a process for the production of carbon dioxide and hydrogen from a gas flow comprising at least hydrogen, at least one sulfur-comprising component and carbon dioxide originating from a Claus unit fed with a gas comprising at least 50 mol % of oxygen, the gas flow is compressed and dried in order to produce a compressed and dried gas flow and the compressed and dried gas flow is separated at a subambient temperature in order to produce at least a fluid enriched in carbon dioxide with respect to the compressed and dried gas flow and at least a fluid enriched in hydrogen with respect to the compressed and dried gas flow.

Method and apparatus for producing carbon dioxide and hydrogen

In a method for producing a first pressurized gas and a second gas on a one-off basis by cryogenic distillation of air, according to a first step, no fluid heats up or cools down in a second heat exchanger, and according to a second step, a flow of pressurized liquid from the double column heats up and vaporizes in the second exchanger to form a gas required on a one-off basis, a flow of air at the second pressure cools in the second exchanger.

Process for producing gaseous oxygen by cryogenic distillation of air, wherein a portion of the feed air flow is brought to a pressure P, by means of a first compressor, the suction temperature Tof which is between 0 and 50&#xb0; C., the gas at the pressure Pis cooled, in order to generate an air stream at the pressure Pand the temperature Tbetween 5 and 45&#xb0; C., a portion of the air compressed in the first compressor undergoes an additional compression step starting from the temperature Tand pressure Pto a pressure Pgreater than P, then is cooled, to the temperature Twhere Tand Tdiffer by less than 10&#xb0; C.

Process and apparatus for producing gaseous oxygen by cryogenic distillation of air

In a process for the separation of a stream containing carbon dioxide, water and at least one light impurity including a separation step at subambient temperature, the feed stream is compressed in a compressor comprising at least two stages to form a compressed feed stream, the compressed feed stream is purified in an adsorption unit to remove water and form a dried compressed stream, the dried compressed stream or a stream derived therefrom is cooled to a subambient temperature and separated by partial condensation and/or distillation in a separation apparatus, liquid enriched in carbon dioxide is removed from the separation apparatus, the adsorption unit is regenerated using a regeneration gas and the regeneration gas is formed by separating, by permeation in a permeation unit, the dried compressed stream or a gas derived therefrom, the permeate of the permeation unit constituting the regeneration gas.

Process and apparatus for the separation of a stream containing carbon dioxide, water and at least one light impurity including a separation step at subambient temperature

The invention relates to a unit for the purification of a gas flow comprising CO and at least 45% CO2 and a method of operating said unit. In one embodiment, said unit contains a first compressor, a heat exchanger configured to cool the compressed gas flow, a separation chamber configured to separate head gas produced in the heat exchanger, a heater disposed on the line of the head gas originating from the separation chamber, a catalytic oxidation unit for oxidizing the compressed CO in the gas flow originating from the heater, and turbines placed downstream of the catalytic oxidation unit.

[object Object]

A method for separating air is provided, in which a flow of oxygen-rich liquid is sent to a top of a pure oxygen column, having a pure oxygen reboiler, in which said flow is purified in order to form a vessel liquid containing at least 98 mol % of oxygen and the vessel liquid is drawn off as a product. A supercharged airflow at a second pressure is sent to the pure oxygen reboiler and to a liquid oxygen vaporizer; a nitrogen-rich gas is drawn from the top of the medium-pressure column and sent to an intermediate reboiler of the low-pressure column and the condensed gas is sent to the top of the medium-pressure column; and a nitrogen-rich gas or air is sent to a vessel reboiler of the low-pressure column and the liquid that condenses therein is sent to the medium-pressure column.

In a method for supplying nitrogen to a combustion chamber, gaseous nitrogen () is drawn off from an air separation unit () at a first pressure, the nitrogen is compressed in at least two stages (C, C) of a nitrogen compressor and sent to a combustion chamber () at a second pressure, which is the output pressure of the last stage (C) of the nitrogen compressor, between two stages of the nitrogen compressor the nitrogen is humidified by direct contact in passing through a contactor () supplied at its top with water, and the humidified nitrogen is compressed in at least one stage of the nitrogen compressor and sent to the combustion chamber.

Method and apparatus for supplying a combustion chamber with nitrogen

An air separation plant is provided that includes a plurality of air compressors, a plurality of air purification units, and one or more cold boxes. In a first mode of operation, a first air compressor is configured to compress air to a higher pressure than a second air compressor. In a second mode of operation, the second air compressor is configured to compress air to a higher pressure than during the first mode of operation.

Air separation plant and process operating by cryogenic distillation

The process can include, during a first and second period of time, sending a first stream of oxygen rich gas from an ASU to a first oxygen consuming unit, the first unit being integrated with a system for the generation of electricity, during the first period of time, sending a second stream of oxygen rich gas from the ASU to a second unit, the second unit being a combustion unit, a first stream of air being supplied to the combustion unit during the first period, removing a second COcontaining gas from the second unit without sending any of the second COcontaining gas back to the second unit and during the second period of time, sending no oxygen rich gas from the ASU to the second unit without sending any of the third COcontaining gas back to the second unit.

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La Varenne Saint Hilaire, France

Richard Dubettier-Grenier