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 a Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude

Pierre-Robert Gauthier

Pascal Marty

Bernd Polster

Christian Lacoste

The invention concerns a method for combined production of hydrogen and carbon dioxide from a mixture of hydrocarbons wherein the residual PSA is treated to produce a carbon dioxide-enriched fluid, and wherein: the residual PSA is compressed to a pressure such that the partial pressure of the CO&#x3c;SUB&#x3e;2&#x3c;/SUB&#x3e; contained ranges between about 15 and 40 bar; the residue is subjected to one or more condensation/separation steps with production of CO&#x3c;SUB&#x3e;2&#x3c;/SUB&#x3e;-rich condensate(s) and a purge of noncondensable gas; the purge of noncondensable gas is preferably treated to produce a H&#x3c;SUB&#x3e;2&#x3c;/SUB&#x3e;-rich permeate which is recycled to the PSA, and a residue which is recycled to syngas generation, Preferably, the condensate(s) are purified by cryogenic distillation to produce food grade CO&#x3c;SUB&#x3e;2&#x3c;/SUB&#x3e;. The invention also concerns an installation for implementing the method.

Method and installation for combined production of hydrogen and carbon dioxide

In an integrated process for the production of synthesis gas, a partial oxidation unit and a steam methane reformer are used to convert natural gas or another fuel to first and second mixtures of at least carbon monoxide and hydrogen, only the first process consuming oxygen. Carbon dioxide derived from the second mixture is sent to the inlet of the first process to reduce the oxygen consumption. The first and optionally second mixtures may be used as synthesis gas for a process such as a Fischer Tropsch process.

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Fresnes, France

Pierre-Robert Gauthier