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Gas-solid contact was provided in the rotating conical reactor. At room temperature, biomass particles and hot sand particles are contacted near the bottom of the cone when the solids are mixed and carried up by the rotational motion of the cone. In such reactors, rapid heating and short gas retention time should be provided. Pressure is just above atmospheric levels. The initially entrained biomass enters the reactor superficially so that the particles are centrifuged against the cyclone wall, which is electrically heated to 1000 °C [59].