Cost of carbon capture and storage in the US

 Carbon capture and storage is costly.  According to this analysis (below), it will add $50 to $60 to the cost of coal-fired electricity, and $80-$90 to gas-fired.  Lazard's estimate of the cost of new coal is $112/MWh, without subsidy, carbon tax or CCS.  So unless there is a tax credit (= subsidy), forcing coal power stations to introduce CCS will put up the cost of electricity from new coal power stations to ±$170/MWh (1 MWh of coal-fired electricity produces roughly 1 tonnes of carbon).  And the operating cost of existing coal will rise from $41/MWh to $100/MWh.  This compares with the cost of wind + solar + 4 hours of storage of around $40/MWh.   If, instead of a subsidy for CCS, we introduce a carbon tax/price on carbon high enough to make CCS worthwhile, the cost of power from coal will rise anyway.   Either way, coal will just be priced out of the market more quickly.  

A reminder: the EU price on carbon is roughly US$73/tonne.  And the EU  is determined to levy a carbon border tax on imports from countries which don't have a price on carbon, which will drive the global adoption of a carbon tax.  After all, why pay a carbon tax to Europe when you could pay it to yourself?

From The Royal Society

We model the costs of carbon capture and storage (CCS) in subsurface geological formations for emissions from 138 northeastern and midwestern electricity-generating power plants. The analysis suggests coal-sourced CO2 emissions can be stored in this region at a cost of $52–$60 ton−1, whereas the cost to store emission from natural-gas-fired plants ranges from approximately $80 to $90. Storing emissions offshore increases the lowest total costs of CCS to over $60 per ton of CO2 for coal. Because there apparently is sufficient onshore storage in the northeastern and midwestern United States, offshore storage is not necessary or economical unless there are additional costs or suitability issues associated with the onshore reservoirs. For example, if formation pressures are prohibitive in a large-scale deployment of onshore CCS, or if there is opposition to onshore storage, offshore storage space could probably store emissions at an additional cost of less than $10 ton−1. Finally, it is likely that more than 8 Gt of total CO2 emissions from this region can be stored for less $60 ton−1, slightly more than the $50 ton−1 Section 45Q tax credits incentivizing CCS.

The Royal Society. 
Dating from a time when architecture produced beautiful buildings as a matter of course.