Fig. 8. Reaction between silicon and methanol at 240 °C with a methanol flow rate of 6 mL h⁻¹. Reaction conditions: (a) The CuCl/Si mixture was not pretreated before reaction. The amount of CuCl/Si mixture was 40 g with a CuCl/silicon weight ratio of 8 : 100. (b) The spent CuCl/Si mixture was chlorinated with HCl (40 mL min⁻¹) at 280 °C for 1.5 h before reaction.