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

Antonio Trueba

Solene Valentin

Bernard Saulnier

Jorge Ernesto Tovar Ramos

Frederic Crayssac

Guillaume Cardon

Marine Andrich

Solène Valentin

Frédéric Crayssac

Jacopo Seiwert

David Bednarski

David Frimat

Jérémy Ollier

A unit for producing argon by cryogenic distillation, suitable for connection to a double air separation column consisting of first and second columns interconnected thermally, comprises an argon separation column surmounted with a top condenser and a denitrogenation column, means for withdrawing an argon-rich and nitrogen-depleted product (LAR) at the bottom of the denitrogenation column, means for connecting the top of the argon separation column to the denitrogenation column, means for sending a top gas from the argon separation column to the atmosphere, means for withdrawing a nitrogen-rich fluid from the top of the denitrogenation column, an analyser for measuring the nitrogen content at the top of the argon separation column, and means for opening and closing the means for connecting the top of the argon separation column to the denitrogenation column depending on the nitrogen content detected by the analyser.

Method for starting up an argon separation column of an apparatus for air separation by cryogenic distillation and unit for implementing the method

Process for producing biomethane from a biogas stream including methane, carbon dioxide and at least one impurity chosen from ammonia, volatile organic compounds, water, sulfur-based impurities (HS) and siloxanes. A biogas stream is dried, the at least one impurity is at least partially removed by solidification and removal of the impurity. The methane and the carbon dioxide contained in the biogas obtained from the second step are separated so as to produce a biomethane stream and a COstream.

Process for producing biomethane from a biogas stream, comprising solidification of the impurities

Plant and process for the production of liquid methane from a feed gas stream comprising at least methane and carbon dioxide. A feed gas stream is injected into a COcrystallizer in countercurrent fashion against a stream of predominantly liquid methane, thereby crystallizing amounts of carbon dioxide from the feed gas stream. Gaseous methane recovered from the COcrystallizer is liquefied at a liquefaction exchanger.

Purification and liquefaction of biogas by combination of a crystallization system with a liquefaction exchanger

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Antonio Trueba