An odd thing about Coal fired Power Stations that people sometimes forget. They want to make as much electricity as possible from each ounce of coal. So mostly it is burned in Babcock style water tube boilers, with feed-water pre-heaters air pre-heaters (Economisers), superheaters - so the dry steam is utilised at over 600 degrees C in the turbines - and leaves dry at over 150 deg.C. But the "odd" thing is the combustion method: To burn the coal it is ground into "dust" and blown into the boiler in huge volumes of air, so there is almost no Hydrocarbon or Carbon monoxide in the exhaust. It's just like a big blow-lamp! I'm not sure the fluidised bed actually improves on this - as I remember it was mentioned frequently in my Dad's monthly "Power News" (magazine of the CEGB), but I don't know of any Fluidised Bed large boilers? - I suspect the "dust blowers" do the same job as effectively? The xhaust from "dust blowers" does produce exhaust full of "fly-ash". But the post combustion precipitators clean the exhaust gasses so particulates are kept to levels as low as modern Petrol vehicles - or lower - depending on the country. Light-beam(or maybe lazer scattering?) particle detectors are used in the stack to constantly monitor the cleanliness of the exhaust for particulates. Any Sulphur products may be allowed by local legislation to go up the flue, but in many modern countries they are not allowed, so Magnesium oxide (??) (Milk-of-magnesia? / indigestion tablets?) is sprayed into the exhaust to neutralise the sulphur and it is collected in separate precipitators (Magnesium Sulphate - Epsom salts?- as used in the washing powder industry? - or whatever?). So the gaseous exhaust is CO2 and H2O.... A pity the CO2 is banned in many places. The CO2 can be sequestered (not sure of the chemistry?) but that process makes the electricity a bit more expensive, and with fossil fuels being banned within the 40 year lifetime of a modern power station's life, the whole thing has been made to be uneconomic in some countries. (maybe not China? - The world's biggest population, growth region and burner of fossil fuels?).
I guess that no-one in their right mind models modern coal-fired power stations - I.C engines are much simpler?
K2