Component technologies to make low-carbon electricity from coal have been tested
All of the components of carbon capture and sequestration (CCS) technologies for making electricity from cal with low CO2 emissions have already been operated at commercially relevant scales. These components include the capture of CO2 before it can be emitted by coal plants and the transport of CO2 by pipeline to areas with suitable geology for underground injection, as well as storage in underground formations. Actual commercial-scale systems for low-CO2 coal power have not yet been built, however. That is due partly to cost and partly to the lack of regulations on where and how CO2 can be injected below ground — both in the US and other countries.
The impetus for CCS comes from the fact that rising CO2 is causing the planet to warm and that the ongoing increase in atmospheric CO2 comes from burning fossil fuels, mostly coal.