In this research, a lab-scale conical spouted bed reactor was designed and built for examining the degradation of biomass feedstock. The effect of temperature has been studied, and parameters such as the percentage of the product and the quality of the produced fuel were reported in a continuous steady-state process. In this study, the maximum bio-oil yield (55 wt% on wet basis) was obtained at a temperature range of 425-500 °C. CFD modeling was then carried out to evaluate hydrodynamic parameters such as bed pressure drop, temperature distribution, solid and gas volume fractions in the reactor. The results were compared with the experimental data. The effect of gas inlet velocity and wall temperature as well as the boundary conditions of the reactor wall on pressure drop and heat transfer coefficient were investigated. The impacts of restitution and specularity coefficients on bed hydrodynamics and stability were also studied. In another experiment performing in a batch mode, the effect of gas flow rate, residence time and reactor temperature were investigated. Also, a kinetic model for biomass degradation was introduced. The proposed reaction scheme in this model reflects the initial reactions of the production of bio-based products (gas, bio-oil, and char) and a secondary cracking reaction of bio-oil to produce gas. Adding this secondary reaction in the gas phase provides the possibility of introducing the impact of the residence time in the model, which is essential for reactor scale-up. The proposed kinetics model accurately predicts experimental results in a wide range of pyrolysis conditions. Accordingly, this model is a suitable tool for simulating and scaling-up the spouted bed reactor for the fast pyrolysis process. Modeling runs were done by CFD, to validate these results, and the amounts of products generated by modeling were validated with experimental data. Also, effect of different geometric parameters on bed stability, volume fraction of solid phase, and products was studied. The results show that CFD modeling can accurately predict the bed hydrodynamics and product amounts. The optimal entrainment zone height and draft tube diameter for achieving the most stable spouting regime, which results in optimum products, are in the range of 1.5-1.75 and 1.35-1.3 cm, respectively. According to the results, draft tube makes a better circulation of solid particles, stabilizes the flow regime, and improves mixing characteristics, resulting in better degradation of biomass particles