A small quantity of nitrogen is included as a proxy for inerts mainly from the carbon capture process. The process is made self-sufficient in heating for the methanol distillation column with a slight surplus in heat from the methanol reactor unutilised. The integration of the heat from the reactor into a steam-driven pre-heater upstream the reactor has already been demonstrated by but for simplicity this is not implemented. pression of CO 2 from atmospheric pressure and hydrogen compressed from approx. 30 bar.