Knowledge of agricultural biomass briquettes in downdraft gasifier?

Hello everyone,
I am writing a proposal to establish practical tryouts of agricultural biomass in downdraft gasifier boilers. Has there been any testing done by manufacturers or owners of downdraft systems? The plan is to use briquettes, not pellets. Pellets have been done before with their known limitations due to high ash content.
Cheers,
Trex83

Reply to myself, finally found a thread that corresponds to what I was looking for. I'll think about what's on that thread and probably come back with more questions.

http://www.hearth.com/talk/threads/who-burns-biomass-besides-cord-wood.68678/