The aim of this communication is to advocate for use of high density powders (more than 5000 kg/m3) in experimental simulation of gas-particles flows of Circulating Fluidized Bed (CFB) boilers. These industrial facilities are used as ecological electricity suppliers with effective pollutants capture for a high thermal net efficiency. Usually, as illustrated by the results available in the literature, solid particles used for experimental simulation in the aim of industrial design of these plants are sand, glass beads or FCC (about 1200 kg/m3 or less). We give here arguments for re-orientation of applied research in the field of energy production by CFB, suggesting that powders with higher density would lead to a better design of industrial facilities through more adapted similitude laws. Improving such technology is challenging since CFB plants are only at their second stage of development and could be advantageously combined to another ecological electricity supply technology based on gasification process of biomass.
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