The utilization of biomass in fluidized bed reactors is due to alternatives created by the carbon credit market and to environmental concerns. This fact calls for an accurate determination of physical-chemical properties and hydrodynamic studies on biomass-inert binary mixtures. In bubbling fluidized bed combustion processes, the inert material mass is approximately 95% of the total mass of the bed material, and an effective mixture between biomass and inert particles is desired to improve the efficiency of the process. In this study, binary mixtures, composed of biomass and sand as an inert material, were used. Thermal and physical-chemical properties of five biomass samples (sugarcane bagasse, pine sawdust, coffee husk, Tucumã seed, and rice husk) were experimentally evaluated. The morphology of the samples was determined by SEM, and the thermal properties were found by thermogravimetric analysis (TG) and differential thermal analysis (DTA). The hydrodynamic study was carried out in a fluidized bed at room temperature and local atmospheric pressure, in which the minimum fluidization velocity and voidage of the biomass-inert binary mixture were evaluated. The arrangement of the physical-chemical characteristics of biomass and the hydrodynamics of the binary mixture are equally important for predictions of the biomass behavior in fluidized bed combustors. © 2014 Elsevier B.V. All rights reserved.124 188197Park, D.K., Kim, S.D., Lee, S.H., Lee, J.G., Co-pyrolysis characteristics of sawdust and coal blend in TGA and fixed bed reactor (2010) Bioresour. Technol., 101, pp. 6151-6156Suarez, J.A., Beaton, P.A., Physical properties of cuban coffee husk for use as an energy source (2003) Energy Sources, 25 (10), pp. 953-959. , DOI 10.1080/00908310303394Demirbas, A., Combustion characteristics of different biomass fuel (2003) Prog. Energy Combust. Sci., 30, pp. 219-230Chevanan, N., Womac, A.R., Bitra, V.S.P., Igathinathane, C., Yang, Y.T., Miu, P.L., Sokhansanj, S., Bulk density and compaction behavior of knife mill chopped switchgrass, wheat straw and corn stover (2010) Bioresour. Technol., 101, pp. 207-214Rao, T.R., Bheemarasetti, J.V.R., Minimum fluidization velocities of mixtures of biomass and sand (2001) Energy, 26, pp. 633-644Pattiaya, A., Thermochemical characterization of agricultural wastes from Thai cassava plantations (2011) Energy Sources, 33, pp. 691-701Chen, W.H., Kuo, P.C., A study on torrefaction of various biomass materials and its impact on lignocellulosic structure simulated by a thermogravimetry (2010) Energy, 35, pp. 2580-2586Ghetti, P., Ricca, L., Angelini, L., Thermal analysis of biomass and corresponding pyrolysis products (1996) Fuel, 75 (5), pp. 565-573. , DOI 10.1016/0016-2361(95)00296-0Yang, H., Yan, R., Chen, H., Lee, D.H., Zheng, C., Characteristics of hemicellulose, cellulose and lignin pyrolysis (2007) Fuel, 86 (12-13), pp. 1781-1788. , DOI 10.1016/j.fuel.2006.12.013, PII S001623610600490XRaveendran, K., Ganesh, A., Khilar, K.C., Pyrolysis characteristics of biomass and biomass components (1996) Fuel, 75 (8), pp. 987-998. , DOI 10.1016/0016-2361(96)00030-0, PII S0016236196000300Özgür, E., Miller, S.F., Miller, B.G., Kök, M.V., Thermal analysis of co-firing of oil shale and biomass fuels (2012) Oil Shale, 29, pp. 190-201Kök, M.V., Özgür, E., Thermal analysis and kinetics of biomass samples (2013) Fuel Process. Technol., 106, pp. 739-743Fotovat, F., Shabannian, J., Chaouki, J., Bergthorson, J., Characterization of the fluidization and mixing of binary mixtures containing biomass at low gas velocities (2011) Proceedings of the 13th Int. Conf. on Fluidization - CFB 10, , (Oregon, USA)Rasul, M.G., Rudolph, V., Fluidized bed combustion of Australian bagasse (2000) Fuel, 79 (2), pp. 123-130. , DOI 10.1016/S0016-2361(99)00144-1Cui, H., Grace, J.R., Fluidization of biomass particles: A review of experimental multiphase flow aspects (2007) Chemical Engineering Science, 62 (1-2), pp. 45-55. , DOI 10.1016/j.ces.2006.08.006, PII S0009250906004842, Fluidized Bed ApplicationsFormisani, B., Girimonte, R., Longo, T., The fluidization process of binary mixtures of solids: Development of the approach based on the fluidization velocity interval (2008) Powder Technology, 185 (2), pp. 97-108. , DOI 10.1016/j.powtec.2007.10.003, PII S0032591007005104Zhang, Y., Jin, B., Zhong, N., Experimental investigation on mixing and segregation behavior of biomass particle in fluidized bed (2009) Chem. Eng. Process. Intensification, 48, pp. 745-754Wendlandt, W., (1986) Thermal Analysis, , John Wiley New YorkGeldart, D., Types of gas fluidization (1973) Powder Technol., 7, pp. 285-292Rowe, P.N., The effect of pressure on minimum fluidization velocity (1984) Chem. Eng. Sci., 39, pp. 173-174Basu, P., (2006) Combustion and Gasification in Fluidized Beds, p. 473. , Taylor and Francis Group Boca Raton, FloridaBorman, G.L., Ragland, K.W., (1998) Combustion Engineering, pp. 125-133. , McGraw-Hill BostonOka, S.N., (2004) Fluidized Bed Combustion, p. 600. , 1st ed. Marcel Dekker Inc. Nova YorkQian, F.P., Chyang, C.S., Huang, K.S., Tso, J., Combustion and NO emission of high nitrogen content biomass in a pilot-scale vortexing fluidized bed combustor (2011) J. Bioresour. Technol., 102, pp. 1892-1898Haseli, Y., Van Oijen, J.A., Goey, L.P.H., A detailed one-dimensional model of combustion of a woody biomass particle (2011) Bioresour. Technol., 102, pp. 9772-9782Rouquerol, F., Rouquerol, J., Sing, K., (1999) Adsorption by Powders and Porous Solids: Principles, Methodology and Applications, , Academic Press LondonWebb, P.A., Orr, C., (1997) Analytical Methods in Fine Particle Technology, , Micromeritics Instrument Corporation NorcrossDriemeier, C., Oliveira, M.M., Mendes, F.M., Gómez, E.O., Characterization of sugarcane bagasse powders (2011) Powder Technol., 214, pp. 111-116Zhang, Q., Cai, W., Enzymatic hydrolysis of alkali-pretreated rice straw by Trichodermareesei ZM4-F3 (2008) Biomass Bioenergy, 32, pp. 1130-1135Markovska, I.G., Lyubchev, L.A., A study on the thermal destruction of rice husk in air and nitrogen atmosphere (2007) Journal of Thermal Analysis and Calorimetry, 89 (3), pp. 809-814. , DOI 10.1007/s10973-007-8294-2Babu, B.V., Biomass pyrolysis: A state-of-the-art review (2008) Biofuels Bioprod. Biorefin., 2, pp. 393-414Shen, D.K., Gu, S., Jin, B., Fang, M.X., Thermal degradation mechanisms of wood under inert oxidative environments using DAEM methods (2011) Bioresour. Technol., 102 (2011), pp. 2047-2052