I always thought clean coal was an oxymoron, like Army Intelligence or compassionate conservative. It ain’t clean. Apparently it is not cost-effective either. The biggest supposed clean coal plant is only using natural gas and not coal:
The operators of the largest “clean coal” power plant project in the United States announced Wednesday that they no longer plan to utilize coal at the facility.
Southern Company and Mississippi Power said in a statement that they will suspend efforts to turn on the coal gasification portion of the company's Kemper County power plant in rural Mississippi.
The facility will instead operate using natural gas, something the state’s Public Service Commission ordered at a meeting last week.
snip
But when operators began testing the coal gasification process last fall, further problems emerged, including leaking.
Mississippi Power asked regulators earlier this month for permission to charge customers more to compensate for the increased costs of the coal portion of the facility.
The Mississippi Public Services Commission instead voted unanimously to require the plant either operate its coal process at current costs or run entirely on natural gas instead.
The Hill
They chose not to use coal.
Coal is not just bad for climate change. It kills:
In addition to atmospheric pollution, coal burning produces hundreds of millions of tons of solid waste products annually, including fly ash,[1] bottom ash, and flue-gas desulfurization sludge, that contain mercury, uranium, thorium, arsenic, and other heavy metals.
There are severe health effects caused by burning coal.[2][3] According to a report by the World Health Organization in 2008, coal particulates pollution are estimated to shorten approximately 1,000,000 lives annually worldwide.[4] A 2004 study commissioned by environmental groups, but contested by the US EPA, concluded that coal burning costs 24,000 lives a year in the United States.[5]
wikipedia
Coal kills. Better to use other fuels or solar, wind, or hydro.