{"id":100,"date":"2021-12-14T04:47:33","date_gmt":"2021-12-14T03:47:33","guid":{"rendered":"https:\/\/www.geostockgroup.com\/activites\/le-stockage-de-co2\/"},"modified":"2026-03-04T16:03:39","modified_gmt":"2026-03-04T15:03:39","slug":"co2-storage","status":"publish","type":"page","link":"https:\/\/www.geostockgroup.com\/en\/activities\/co2-storage\/","title":{"rendered":"CO2 underground storage"},"content":{"rendered":"\n
\n\n
\n
\n

Why store CO2<\/sub> ?<\/h2>\n

Carbon dioxide (CO2<\/sub>) produced by the combustion of fossil fuels (oil, gas, coal) is one of the most significant contributors to global warming.<\/p><\/blockquote>\n

 <\/p>\n

One way to minimise the impact of CO2<\/sub> on the climate<\/strong> is to isolate it from the atmosphere by reinjecting it into deep geological formations. The international community refers to this chain Carbon Capture and Storage (CCS). The Intergovernmental Panel on Climate Change (IPCC) presents CO2<\/sub> capture, use and storage techniques as a necessity to keep the temperature rise below 1.5\u00b0C to 2\u00b0C.<\/p>\n

CCS is carried out in three stages: <\/strong>the capture of CO2<\/sub> at its point of emission (mainly from industrial source), its transport to its storage location, and its geological storage in suitable formations.<\/p>\n <\/div>\n <\/div>\n\n<\/section>\n\n\n

\n\n
\n
\n

Do you have a CO2<\/sub>\u00a0storage project?<\/a><\/p>\n <\/div>\n <\/div>\n\n<\/section>\n\n\n

\n\n
\n\n
\n
\n \"\" <\/figure>\n <\/div>\n\n <\/div>\n\n<\/section>\n\n\n
\n <\/div>\n\n\n\n\n
\n\n
\n
\n

CO2\u00a0<\/sub> capture<\/h2>\n

Capture technologies aim at CO2<\/sub> separation from the plan exhaust gas instead of releasing it to the atmosphere. They can be classified into three categories, according to the type of changes they induce in the emitting processes:<\/p>\n

Without process modification<\/h3>\n

In these emitting processes, production is associated with \u00a0CO2<\/sub> release (e.g. natural gas processing, hydrogen production, bioethanol production). Recovering CO2<\/sub> for geological storage or any other industrial use thus requires no changes to the emitting process, an example being methane reforming plants in refineries.<\/p>\n

Downstream changes to the CO2<\/sub> emitting process<\/h3>\n

This technology is referred to as post-combustion capture. The CO2<\/sub> is separated from the exhaust gas stream produced either by the combustion of fuels in air or by the process itself (for example, decarbonising in cement production or the reduction of iron oxides in the steel industry). The separation process downstream of the emitting process limits changes to the emitting process.<\/p>\n

Upstream changes to the CO2<\/sub> emitting process through the modification of fuels or oxidants before combustion<\/h3>\n

In pre-combustion capture, the initial carbon-rich fuel is transformed into a carbon-free synthesis gas. Decarbonising the inlet gas generates CO2<\/sub>, which is captured before its used, hence the term “pre-combustion”. The synthesis gas is then used in the industrial process that is being decarbonised. Hydrogen is the gas most often envisaged to play the role of decarbonised fuel.<\/p>\n

In oxy-combustion capture, atmospheric air is replaced by pure oxygen, which avoids dilution of the CO2<\/sub> formed during combustion by the nitrogen in the atmospheric air and facilitates its separation.<\/p>\n <\/div>\n <\/div>\n\n<\/section>\n\n\n

\n\n
\n
\n

Do you have a CO2<\/sub>\u00a0storage project?<\/a><\/p>\n <\/div>\n <\/div>\n\n<\/section>\n\n\n

\n\n
\n
\n