Carbon capture and storage (CCS) technology could play a vital role in helping humanity reduce CO2 emissions. By making fossil fuel plants and heavy industry (such as cement production) more climate friendly.
CO2 is compressed to supercritical conditions before being injected deep underground for permanent storage in geologic formations. There are currently multiple commercial-scale projects underway across the United States and worldwide to do this.
What is CCS?
Carbon Capture, Utilisation, and Storage (CCUS) is an innovative suite of technologies that can help combat climate change by extracting CO2 from fossil fuel power plants before it escapes into the atmosphere. CCS then transports and permanently stores this CO2 within geological formations deep underground.
CCS technology works through post-combustion capture, in which CO2 is removed from exhaust gas; pre-combustion capture (which adds solvents to fossil fuels before combustion); and direct air capture, whereby CO2 is directly removed from the atmosphere and transported by pipeline or specially-adapted ships to its permanent storage site.
This process is governed by the London Protocol of the International Maritime Organization (IMO), with provisions adopted in 2009 that enable countries to export CO2 for subseabed storage under London Protocol* provisions. This provisional application permits nations to begin work on CCS projects even while legal entry into force has yet to occur.
What are the benefits of CCS?
Carbon capture and storage (CCS) can play an essential role in combatting climate change. CCS allows power plants and industrial processes that produce high volumes of CO2, such as coal mining, oil refining, natural gas extraction, cement and steel manufacturing, to reduce their greenhouse gas emissions by capturing it before it escapes into the atmosphere.
Most carbon capture and storage (CCS) strategies call for the captured CO2 to be injected deep underground, creating an “open loop” between fossil fuels and the environment, while significantly decreasing atmospheric greenhouse gas emissions.
Governments and economic organizations around the world recognize the advantages of carbon capture and storage (CCS), creating legal frameworks to promote its development and deployment. CCS allows “hard-to-decarbonize” sectors like heavy industry and cities to continue operating without increasing CO2 emissions, helping communities avoid expensive energy cost increases while supporting sustainable economic development. Captured CO2 can also be utilized for other purposes including:
What are the costs of CCS?
CCS is an indispensable technology to reduce greenhouse gas emissions and address climate change, and can be cost-effective when integrated with a full portfolio of low carbon technologies. Governments and economic organizations around the world have recognized its value; as a result, many have developed legislative frameworks to encourage its deployment.
CCUS (carbon capture, utilization and storage) technology helps us reduce carbon dioxide levels by collecting CO2 from power plant exhaust gases or directly from the atmosphere for storage beneath geological formations for permanent isolation.
Underground CO2 storage has been commercialized since 1972 and is an established technology. There is already enough capacity available globally to store all the CO2 captured by CCUS on a global scale; moreover, experience from existing projects has shown it can be accomplished at competitive costs to fossil fuels.
What are the risks of CCS?
CCS comes with several risks. For instance, it uses toxic chemicals which pose health hazards to workers and nearby communities. Furthermore, adding CCS to a coal-powered power plant increases electricity costs by as much as 40%.
CCS could play an essential role in creating a low-carbon future despite these difficulties, by helping reduce CO2 emissions from fossil fuels and industrial processes and helping mitigate climate change. Furthermore, CCS enables continued fossil fuel usage in regions where renewables cannot easily replace them; providing an ideal way of reconciling environmental concerns with economic development and growth.
Carbon storage can be an unpredictable endeavor as we don’t fully comprehend the geology where CO2 will be stored. Furthermore, complex property laws make obtaining underground storage space challenging; for instance in the US surface owners have priority rights while oil drilling companies receive their minerals rights.