Catalytic Activity of Amberlyst A-21 in the Disproportionation of Trichlorosilane at Critical Temperatures

Abstract

The catalytic properties of Amberlyst A-21 anion-exchange resin in the gas-phase disproportionation reaction of trichlorosilane (TCS) at temperatures (up to 423 K) critical for the resin are investigated for the first time. It is established using thermal desorprtion followed by pyrolysis that Amberlyst A-21 undergoes thermal destruction to form chloromethane and the spherical polymer matrix decomposes at above 423 K. In the temperature range of 333–423 K, the apparent activation energy of disproportionation of TCS with using Amberlyst A-21 is 37.12 kJ/mol and the reaction rate constant is 0.80 s⁻¹ (at 423 K). Three months of testing of the resin in disproportionation of TCS at 423 K demonstrates its stable catalytic activity.