Injection of biomass powders into multiphase reactors is a challenging task that may impact the process yield and limit the operation due to the feeder’s blockage or unstable flow. A horizontal pressurized gas-solid feeder is characterized in this study to inject a batch of biomass powders of different diameters into cold-flow model operating under single phase, and multiphase fixed and fluidized regimes. The gas-solid hydrodynamics in the injection line is investigated for different operating conditions, using a fast camera with acquisition rate of 3000 images/s. Stable injections are performed in a wide range of solids fluxes, and under different solid concentration flow conditions. The operation map for the feeder is produced, and the phenomena that produce difficulty of stable injection are discussed. Ultimately, this type of solids injector is useful for feeding powders into lab-scale reactors for mixing and kinetic studies and might be also scaled-up for treating waste biomass powders into pilot-to-industrial scale reactors under batch or semi-continuous operations.

将生物质粉末注入多相反应器是一项具有挑战性的任务，由于进料器的堵塞或不稳定的流动，它可能会影响工艺产量并限制操作。在这项研究中，水平加压气固进料器的特点是将一批不同直径的生物质粉末注入在单相、多相固定和流化状态下运行的冷流模型中。使用采集速率为 3000 幅图像/秒的快速相机研究了不同操作条件下注入管线中的气固流体动力学。在各种固体流量和不同固体浓度流动条件下进行稳定进样。制作了供料器的运行图，讨论了产生稳定注射困难的现象。最终，