METHOD FOR REMOVING CO2 FROM A METHANE-CONTAINING GAS

• Main Authors: HACK Gamuret, JORDAN Uwe, VÖLLMY Lukas
• Format: Patent
• Language: English; Spanish
• Published: 21.08.2023
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; BLASTING; CHEMISTRY; COMBINED HEATING AND REFRIGERATION SYSTEMS; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; LIQUEFIED PETROLEUM GAS; LUBRICANTS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METALLURGY; MIXTURES BY PRESSURE AND COLD TREATMENT; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRIGERATION OR COOLING; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TRANSPORTING; WEAPONS

The invention relates to a method for removing CO2 from a methane-containing gas, having the steps of providing a methane-containing gas (103) containing at least CO2 as an impurity, cooling the gas (103) in order to separate CO2 from the methane-containing gas (103) by freezing out same, and additionally reducing the CO2 concentration of the gas (103) using a PTSA (111), whereby a methane-enriched product gas (117) is obtained. At least a part (127) of the product gas (117) is then conducted through the PTSA (111) as a preparation gas (129), whereby CO2 is absorbed by the preparation gas (129) and is removed from the PTSA (111) as a CO2-enriched preparation gas (133). The preparation gas (133) conducted through the PTSA (111) is then mixed with the methane-containing gas (103). La invención se refiere a un proceso para remover CO2 de un gas que contiene metano, que tiene los pasos de proporcionar un gas que contiene metano (103) que contiene al menos CO2 como impureza, enfriar el gas (103) para eliminar el CO2 del gas que contiene metano (103) mediante su congelación y reducir adicionalmente la concentración de CO2 del gas (103) utilizando un aparato de adsorción por cambio de presión y temperatura (PTSA) (111), mediante lo cual se obtiene un producto de gas enriquecido con metano (117). A continuación, al menos una porción (127) del producto de gas (117) se utiliza como gas de tratamiento (129) y se hace pasar a través del PTSA (111) para su tratamiento, en donde el CO2 es absorbido por el gas de tratamiento (129) y se extrae del PTSA (111) como gas de tratamiento (133) enriquecido con CO2. El gas de tratamiento (133) se recicla después y se mezcla con el gas que contiene metano (103).