Investigations on heat transfer and hydrodynamics under pyrolysis conditions of a pilot-plant draft tube conical spouted bed reactor

Influence of contactor geometry and draft tube configuration on the cycle time distribution in sawdust conical spouted beds

“…M a n u s c r i p t 5 and chemical processes. Furthermore, the effect operating and geometric factors have on the average cycle time of irregular particles does not follow the trend reported for regular particles (Konduri et al, 1999, Makibar et al, 2011.…”

Performance of a conical spouted bed pilot plant for bio-oil production by poplar flash pyrolysis

“…The bed was made up of 6 kg of sand (with a Sauter particle diameter of 1.4 mm), guaranteeing a good heat transfer and isothermicity [23]. The fluidizing gas flow rate was 2 times that corresponding to minimum spouting conditions to ensure stable spouting and low residence time of the volatiles in the reactor, and has been set in the 350-360 Nl min −1 range, depending on operation temperature [25].…”

“…Indeed, the low gas residence times avoid the secondary cracking reactions that reduce bio-oil yield [23]. The particle cyclic movement allows continuously removing the char from the bed as a result of the density difference between pyrolyzed biomass and sand [24,25] and leads to high mass and heat transfer rates, which permits handling biomass particles with irregular texture and higher particle size than in fluidized beds, thus reducing the associated costs [26].…”

Fast characterization of biomass fuels by thermogravimetric analysis (TGA)

“…The spouted bed is an alternative technology for solid fuel combustion, given that it has great advantages for the treatment of coarse and wide size distribution particles (as is the case of biomass) [16], and the turbulence of the regime ensures high heat and mass transfer rates [17], with pressure drop being much smaller than in fluidized beds [18,19].…”