METHOD AND INSTALLATION FOR THE COMBINED PRODUCTION OF AMMONIA SYNTHESIS GAS AND CARBON DIOXIDE

摘要

In a method for the combined production of ammonia synthesis gas and carbon dioxide from a mixture of hydrocarbons, the cooled mixture from a reverse conversion is separated in an adsorption unit by pressure modulation (or PSA) producing a hydrogen-enriched flow (9) having a purity at least equal to 98% and a residual gas (11), the residual gas is processed to produce carbon dioxide and a gas containing nitrogen and methane (25) and at least a portion of the hydrogen-enriched flow and at least a portion of the gas containing nitrogen and methane are mixed to form an ammonia synthesis gas (27).