| 摘要 |
A chemical looping combustion process comprising feeding a fuel gas 10 comprising hydrogen and/or combustible hydrocarbons over a solid state metal oxide, the fuel gas containing at least one sulphur compound which is oxidised by the metal oxide in step 1, re-oxidisation of the metal is carried out in step 2 with an oxidising gas at high temperature. The fuel gas remains substantially un-oxidised by the metal oxide. Preferably the process occurs at a temperature where the hydrocarbons will not be oxidised. The metal oxide is preferably in particulate form and the metal is at least one transition metal of groups VIIA, VIIIA, IB or IIB, in particular Iron, Copper, Nickel, Manganese or Cobalt. Preferably the metal oxide is on a refractory inert support. The metal oxide is preferably contained in a fixed bed 14 and steps 1 and 2 above are alternated in sequence. Sulphur oxide is preferably extracted from the exit gas by Calcium Oxide. |
