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

Solene Valentin

Marc Wagner

Frank Castillo-Welter

Stephane Haag

Timm Schuhmann

Robert Frind

Antonio Trueba

Andreas Ochs

Paul Terrien

Frederic Crayssac

Jorge Ernesto Tovar Ramos

Guillaume Cardon

Marine Andrich

Pascal J Tromeur

Stéphane Haag

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

A process for conducting exothermic equilibrium reactions, especially for the performance of methanol synthesis by heterogeneously catalysed conversion of synthesis gas, is proposed, which enables readjustment and hence optimization of the reaction conditions along the longitudinal coordinate of the reactor. For this purpose, in the process according to the invention, a reactor is used which is divided into a multitude of series-connected reaction cells, each of which comprises a preheating zone, a cooled reaction zone, one or more cooling zones and a deposition zone for condensable reaction products. In this way, the reaction conditions are adjustable to the respective, local composition of the reaction mixture and variable over the reactor length.

Process for conducting exothermic equilibrium reactions

A reactor for conducting exothermic equilibrium reactions, especially for the performance of methanol synthesis by heterogeneously catalysed conversion of synthesis gas, is proposed, which enables readjustment and hence optimization of the reaction conditions along the longitudinal coordinate of the reactor. For this purpose, in accordance with the invention, the reactor is divided into a multitude of series-connected reaction cells, each of which comprises a preheating zone, a cooled reaction zone, one or more cooling zones and a deposition zone for condensable reaction products. In this way, the reaction conditions are adjustable to the respective, local composition of the reaction mixture and variable over the reactor length.

Reactor for conducting exothermic equilibrium reactions

The present invention relates to a method for the combined production of hydrogen and carbon dioxide from a hydrocarbon mixture, in which the hydrocarbon mixture is reformed to produce a syngas which is cooled, then enriched with H2 and CO2, optionally dried, and treated in a PSA hydrogen purification unit to produce hydrogen, the PSA offgas being treated to capture the CO2 and to supply an offgas. This offgas is again treated to supply a stream enriched with H2 and CO2 which is returned to the PSA, where it constitutes a second feed distinct from the main feed.

Method for the production of hydrogen combined with carbon dioxide capture

Growing community of inventors

Le Pecq, France

Solene Valentin