The typical behaviour of commercial propane combustion in a laboratory size fluidized bed of silica sand is described. Four different sizes of sand particles were used (- 500 + 400, - 400 + 315, - 315 + 250 and -250 + 200 mum). The fluidized bed was heated from 400 to 900degreesC, while mixtures of air and propane with various equivalence ratios were blown into the bed through the distributor, and the mole fractions of CO2, CO and O-2 in the flue gases leaving the fluidized bed were measured and recorded. Analysis of the experimental results, especially of the CO2 evolution, revealed trends and a general classification for the experiments.