Obtaining of synthesis gas by gasification of coal and dry reforming of methane. Process of Fischer- Tropsch
The methods of obtaining synthesis gas by coal gasification and dry reforming of methane, also production obtaining of liquid hydrocarbons by the Fischer-Tropsch method are considered in this manuscript. It was established that during the gasification of coal in a dense layer by the direct method, at a temperature of 900 °C, the formation of synthesis gas with a H₂:CO ratio of 1.8: 1.0 is observed. When dry reforming of methane on 5 wt.% NiO-MoO₃/Al₂O₃ catalyst at a reaction temperature of 800 °C, with a CH :CO ratio in the initial reaction mixture equal to 3:1,it is possible to obtain a synthesis gas of composition 2:1. It was determined that in the temperature range of 250-350 ᵒC and a pressure of 5 atm. in the presence of a CuO-ZnO/CaA catalyst, synthesis gas with a ratio of 2:1 (H₂:CO) is converted into liquid hydrocarbons (methanol, ethanol and dimethyl ether). The yield of liquid hydrocarbons is 10-15 vol.%.