Process

A process for the manufacture of one or more useful products comprising:

• a. gasifying a carbonaceous feedstock comprising waste materials and/or biomass in a gasification zone to generate a raw synthesis gas;
• b. partially oxidizing the raw synthesis gas in a partial oxidation zone to generate partially oxidized raw synthesis gas;
• c. supplying at least a portion of the partially oxidized raw synthesis gas to a clean-up zone to remove contaminants and provide a clean synthesis gas;
• d. importing clean power and/or dirty power into the process;
• e. supplying the clean synthesis gas to a first further reaction train to generate at least one first useful product and a tailgas;
• and
• f. diverting selectively on demand a portion of at least one of the carbonaceous feedstock, the clean synthesis gas, the tailgas and (if present) a light gas fraction to heat or power generation within the process, responsive to step d, to control the carbon intensity of the process;
• wherein the removal of contaminants comprises removal of ammoniacal, sulphurous and carbon dioxide impurities;
• wherein at least a portion of the tailgas is selectively diverted on demand to the partial oxidation zone and/or the first reaction train as internal recycle.