RE: Just a couple of points if they haven't been made already.
"Coke fired power stations. Possible, if market can be found for Coking hydrocarbons - I think so!"
Unfortunately LCPD focuses on SO2 and NOx emissions so the coke terminology loophole doesn't exist. Scrubber is cheaper than a full coke run, nice try though, funny.
People have fundamentally got the wrong end of the stick on economics. Its a sad situation.