CO2 storage plentiful but CCS deployment must accelerate warns IPCC


Carbon dioxide (CO2) storage requirements are available to 2100 to limit global warming to 1.5°C although regional availability of geological storage could be a limiting factor and more needs to be done to accelerate CCS deployment, according to the Climate Change 2023: Synthesis Report.

The technical geological storage capacity is estimated to be in the order of 1000 GtCO2, the report states.

CO2 capture and subsurface injection is a mature technology for gas processing and enhanced oil recovery but CCS is less mature in the power sector, as well as in cement and chemicals production, where it is a critical mitigation option.

“Implementation of CCS currently faces technological, economic, institutional, ecological, environmental and socio-cultural barriers,” it states. “Currently, global rates of CCS deployment are far below those in modelled pathways limiting global warming to 1.5°C to 2°C. Enabling conditions such as policy instruments, greater public support and technological innovation could reduce these barriers.”

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