| Solar grade polysilicon is made from high purity trichlorosilane (TCS) or silane. The TCS process is called the Siemens process while the silane process is called the Union Carbide Corporation (UCC) process. In this work, steady state simulation performs different case studies for silane to optimize the process and to help the process design. A steady state model is developed for the silane production from metallurgical grade silicon using Aspen Plus simulation. We present purification of impurities from metallurgical grade silicon to produce solar grade silicon, various reactor models used in Aspen Plus, methodology to design distillation columns used for purification of impurities in Aspen Plus, and the effects of different operating conditions on silane production.;A steady state model for Dichlorosilane (DCS) and Trichlorosilane (TCS) redistribution reactors is developed. This work concentrates on the detailed designing of DCS and TCS redistribution reactors in a catalytic fixed bed liquid phase reaction by using ion-exchange resin as a catalyst. The effects of temperature, pressure, reactor length, reactor diameter, and retention time on silane production by using steady state Aspen Plus are discussed. Finally, pressure drop, mass transfer coefficient, heat transfer coefficient and log mean temperatures are calculated and presented in this work. |
