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Biomass Chemical Looping Gasification is a novel technology allowing high quality syngas production at autothermal conditions without CO 2 emissions to the atmosphere and low tar generation. This work compiles gasification results corresponding to 38 h of continuous operation in a 1.5 kW th unit using pine wood as fuel and a synthetic Fe-based oxygen carrier, Fe20Al. The main operating conditions such as temperature (T = 820-940 °C), steam-to-biomass ratio (S/B = 0.05-0.65), and oxygen-to-biomass ratio (λ = 0.2-0.6) were analyzed at steady state conditions using a novel method for controlling oxygen in the process. A syngas composed by 37% H 2 , 21% CO, 34% CO 2 and 7% CH 4 , and tars below 2 g/Nm 3 could be obtained at autothermal conditions, leading to a syngas yield of 0.8 Nm 3 /kg dry biomass and a cold gas efficiency of 68%. The material maintained a high reactivity although some Fe lost was observed., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)