Portal de Periódicos da CAPES

Stable Performance of Ni Catalysts in the Dry Reforming of Methane at High Temperatures for the Efficient Conversion of CO 2 into Syngas

2013; Wiley; Volume: 6; Issue: 1 Linguagem: Inglês

10.1002/cctc.201300699

1867-3899

Katharina Mette, Stefanie Kühl, Hendrik Düdder, Kevin Kähler, Andrey Tarasov, Martin Muhler, Malte Behrens,

Catalysis and Oxidation Reactions

Abstract The catalytic performance of a Ni/MgAlO x catalyst was investigated in the high temperature CO 2 reforming of CH 4 . The catalyst was developed using a Ni, Mg, Al hydrotalcite‐like precursor obtained by co‐precipitation. Despite the high Ni loading of 55 wt%, the synthesized Ni/MgAlO x catalyst possessed a thermally stable microstructure up to 900 °C with Ni nanoparticles of 9 nm. This stability is attributed to the embedding nature of the oxide matrix, and allows increasing the reaction temperature without losing active Ni surface area. To evaluate the effect of the reaction temperature on the reforming performance and the coking behavior, two different reaction temperatures (800 and 900 °C) were investigated. At both temperatures the prepared catalyst showed high rates of CH 4 consumption. The higher temperature promotes the stability of the catalyst performance due to mitigation of the carbon formation.