"Clean Coal" has been an extraction industry green washing of Coal/Natural Gas/etc since the 90's. While there does exist a technique that captures the majority of Coal Particulates and storing the CO2, it isn't economically feasible (it's cheaper to just not use coal at all.) However since there isn't an interest in NOT using coal, the mining industries have been pushing the concept of clean coal. And then letting the public assume that Coal is now clean. This isn't the coal from the old days, this is new futuristic "Clean Coal."
https://www.popularmechanics.com/technology/infrastructure/news/a27886/how-does-clean-coal-work/
A example of industry green washing article. Nothing they say is a "lie" per se, however the lies are in the omission and lack of comparisons to how much CO2 could be captured, vs how much is actually produced. In addition to the lack of cost-comparison for retrofitting coal plants, vs building new Nuclear Plants or even Gas plants.
From the article:
A 2019 report from the Global CSS Institute estimates it could cost “$100 billion annually” to develop CCS, and that the technology represents “a classic catch-22 scenario.
100-billion a year can build A LOT of Nuclear Plants, let alone Solar Panels, Wind Farms, etc.