A custom designed circulating fluidized bed (CFB) has been created so that engineers at Southwest Research Institute can convert crude oil and biofeedstocks into refined fuel samples for clients more efficiently than previously possible. The CFB is able to produce half a liter per hour of samples, and is able to test both fast pyrolysis processes as well as fluidized catalytic cracking refinery unit operations. This is in part due to the 15 foot tall, 150 square foot CFB being much larger than conventional testing equipment which produces much smaller quantities of material.