The new multicomponent Co-based catalysts with additives of group 8 metal and rare earth elements and supported on alumina have been tested in the dry and steam conversion of a model biogas. The processes were carried out in a flow quartz reactor under the following conditions: atmospheric pressure, a gas hourly space velocity of 1000 h−1 and temperatures of 300–800°C. The catalysts were characterised using electron microscopy, BET and X-ray analysis.
The methane is almost completely converted in the dry reforming of biogas at T≤800°C. Synthesis gas with a ratio of H2/CO>1.0 is a main product of biogas reforming over the multicomponent catalysts studied. Adding steam in a feed composition increases both the methane conversion and the hydrogen yield at lower temperatures. Almost complete methane conversion occurs at T<750°C in the steam reforming of biogas. The catalysts are highly effective and exhibit stable activity throughout 100 h of continuous testing.
 P. Kechagiopoulos, E. Vagia, A. Iordanidis, S.S. Voutetakis, A.A. Lemonidou, I.A. Vasalos, Workshop of CPERI. Catalysis, Energy and Environment (2004) 31, http://library.certh.gr/libfiles/PDF/08-2ND-CPERI-WORKSHOP-SS2-PP31-34.pdf
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