Polysilicon is a key commodity required for both electronics and solar photovoltaic modules. The traditional route to produce polysilicon involves the Siemens reactor, an energy intensive batch process. A more efficient, but more complex alternative process is the fluidized bed reactor (FBR). In an FBR silane is pyrolysed producing chemical vapor deposition (CVD) and aerosols. Efficient FBR operation requires yield optimization together with continuous and stable operation of the reactor. Such optimization is not straightforward because the aerosol formation mechanisms and incorporation into the FBR beads are not completely understood. In this work, two model aerosols with different morphology were tested and their filtration efficiency between 20 and 800 nm was determined. Bead saturation at different times was determined for each morphology and the scavenging factor over time for each case is reported. Such information can be of interest for establishing bed recirculation needs in a silicon FBR.

中文翻译：

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纳米颗粒形态对硅珠流化床过滤效率和饱和度的影响

多晶硅是电子和太阳能光伏模块都需要的关键商品。生产多晶硅的传统方法涉及西门子反应器，这是一个耗能大批处理。流化床反应器（FBR）是一种更有效但更复杂的替代方法。在FBR中，硅烷被热解，产生化学气相沉积（CVD）和气溶胶。高效的FBR操作需要优化收率，以及反应器的连续和稳定运行。由于尚未完全了解气雾形成机理以及将其掺入FBR珠粒中，因此这种优化并非一帆风顺。在这项工作中，测试了两种具有不同形态的模型气溶胶，并确定了它们在20至800 nm之间的过滤效率。确定每种形态在不同时间的磁珠饱和度，并记录每种情况下随时间的清除因子。对于建立硅FBR中的床层再循环需求，此类信息可能是令人感兴趣的。