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Corn burning stoves
Just do a Google search for "corn stoves" there's a million of them.
My sister had one in her house, the main problem was getting a suitable supply. If the corn is too dusty or dirty it clogs up the works and if it is too moist it doesn't burn right.
When it worked, it worked well, in the end they moved it to the workshop and replaced it with a wood pellet stove. She figures the cost of heat was nearly the same and the convenience wasn't worth it.
Best of luck.
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Corn burning stoves
The biggest factor in keeping the price of wood pellets low is the fact that they are manufactured as a 'value-added' product. In other words, the pellets are not manufactured from trees harvested for that purpose.
They are made with scrap wood and sawdust which are by-products from the manufacture of other things, principally lumber.
This is a good deal for the producer, especially if it's a lumber company since they are now getting revenue from their waste. If the price climbs too high the demand will fall off and it will go back to being waste. This doesn't mean they don't edge the price up a little when oil or other heat sources go up, but overall it has stayed pretty steady.
In the 10 years that my sister has been buying pellets she says the cost has only gone up by 15%. Even the cost of firewood has gone up far more than that around here.
Best of luck.
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Corn burning stoves
The problem with burning corn stalks is two-fold.
First, while as a food source stalks are good, they are low in density which means you need far more volume-wise to get the same number of BTU's.
Secondly, in order to dry the stalks to a low enough humidity level to make them suitable you would expend more energy than you would recover by burning them afterwards.
They do make 'bio-fuel' stoves, including one I know very intimately, that will burn corn, but again, you need vast amounts to get any real heat out of it.
The big outdoor models seem to work the best from a reliability point of view, but are expensive initially to setup.
I have seen some interesting hybrids though. A manufacturing shop I know of has an outdoor corn-fired boiler which uses a propane burner to light the corn when it needs to make heat and shuts down completely when not needed. The glycol mixture it heats is stored in a large underground tank that acts as a thermal reservoir, the burner only keeps the tank above a set temperature, the heat is extracted from it by floor loops and heat exchangers that give off a slow steady heat almost continuously. The burner is fed by a large hooper that stands next to it.
Best of luck.
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