Design and experimental tests of an Imbert type downdraft gasifier prototype and clean-up system for small-scale biomass-based power generationMiguel Mendonça, Victor Mantilla, João Patela, Valter Silva and Fernanda ResendeRenew. Energy Environ. Sustain., 7 (2022) 10DOI: https://doi.org/10.1051/rees/2021057