There's a couple of problems with your " cleaner coal " theory.
Firstly, your example is still really high in emissions. It's just a bit less dirty than the old stuff. Calling it " clean " doesn't make it clean.
Secondly. Burning LNG in a power plant is a bit cleaner than coal but the process to produce that LNG is quite dirty. It takes a large amount of energy to liquify the gas for transport.
Thirdly, we keep talking about this " clean coal " technology despite it not existing . CCS hasn't been proven to work for power stations anywhere in the world. We already have a clean technology in the market place. We don't have to wait for it to be invented.
Fourth . " cleaner coal " for Australia doesn't help or protect our export coal industry. The world is shifting to renewables. That means that they are ultimately going to stop using coal sooner or later. We are much better focusing on replacing the coal export income with export income from new industries. Green hydrogen exports and other things like value added resources such as iron ore, lithium where we do more processing here because of our abundance of renewable energy.
Btw. You left out significant parts of that article that you are referencing. Let me add a bit more for context.
"
The drilling and extraction of natural gas from wells and its transportation in pipelines results in the leakage of methane, primary component of natural gas that is 34 times stronger than CO2 at trapping heat over a 100-year period and 86 times stronger over 20 years "
https://ucsusa.org/resources/environmental-impacts-natural-gas
