Combustion chemistry is not my area of expertise. I suggest you look at past posts by Berlin:Coal vs Wood Pellets
There he talks about the combustion process of Anthracite and Bituminous coals. Note how the products of combustion change depending on the amount of combustion air. Now add the impurities in your specific coal, primarily sulfur, and you have a very complex mix of emissions that will vary with how hard the coal equipment is firing.
We all make the false assumption that we can compare the emissions of coal burning electric power plants to residential coal burning. You can't, it's an entirely different combustion process. The power plant does everything economically possible to get all heat out of the coal. We do nothing. I know of no EPA like studies of residential Anthracite coal burning.
What I fear is there will be a rush, because there is a need to rush, for a national energy policy which will impose restrictions on burning coal. These restrictions will likely require costly environmental emissions equipment, that would be phased-in over time. You can see it happening now. You look at stock holder reports of electric utilities and they are talking about huge future capital investment for pollution controls. It's likely it will be unaffordable and/or unavailable for residential sized units. Existing coal appliances could easily be phased out by just banning the retail sale of coal. I've said this before, if there's ever a time for the Anthracite industry, miners, coal producers and equipment to get together and lobby for an exemption it's now.