Autothermal reforming (ATR) is the combination of both partial oxidation (POX) and steam methane reforming (SMR) in one reactor operating at 900-1150 degrees Celcius with energy efficiency lower than that of SMR. The typical reaction is given by the following equation:
CH4+H20/2+O2/4 <-> CO + 5H2/2
The described ATR plant includes a carbon capture and storage (CCS) component.