CH4 Decomposition over Pyrolysis Residue of Sewage Sludge under Microwave Heating

The microwave-assisted CH4decomposition over a pyrolysis residue of sewage sludge (PRSS), which acted as a microwave receptor and a low-cost catalyst without further activation, was investigated in a multimode microwave reactor. The results indicated that the microwave heating of PRSS is heavily influenced by atmosphere. The PRSS temperature in CH4, N2and H2atmosphere follow the sequence ofTCH4<TH2<TN2. PRSS shows excellent initial activity for methane decomposition, but it deactivated very quickly. It was inferred that the fast deactivation of PRSS was mainly caused by temperature falling in CH4atmosphere.