Ni-Co bimetallic and Ni or Co monometallic catalysts prepared for CO(2)reforming of methane were tested with the stimulated biogas containing steam, CO2, CH4, H-2, and CO. A mix of the prepared CO(2)reforming catalyst and a commercial steam reforming catalyst was used in hopes of maximizing the CO(2)conversion. Both CO(2)reforming and steam reforming of CH(4)occurred over the prepared Ni-Co bimetallic and Ni or Co monometallic catalysts when the feed contained steam. However, CO(2)reforming did not occur on the commercial steam reforming catalyst. There was a critical steam content limit above which the catalyst facilitated no more CO(2)conversion but net CO(2)production for steam reforming and water-gas shift became the dominant reactions in the system. The Ni-Co bimetallic catalyst can convert more than 70% of CO(2)in a biogas feed that contains similar to 33 mol% of CH4, 21.5 mol% of CO2, 12 mol% of H2O, 3.5 mol% of H-2, and 30 mol% of N-2. The H-2/CO ratio of the produced syngas was in the range of 1.8-2. X-ray absorption spectroscopy of the spent catalysts revealed that the metallic sites of Ni-Co bimetallic, Ni and Co monometallic catalysts after the steam reforming of methane reaction with equimolar feed (CH4:H2O:N-2= 1:1:1) experienced severe oxidation, which led to the catalytic deactivation.