The incorporation of iron in calcined dolomite and its constituent compounds, CaO and MgO, was investigated. The Fe/CaO, Fe/MgO, and Fe/dolomite systems were prepared using two impregnation techniques to generate the Fe2+ and Fe3+ species, which were then carefully characterized.
Tar conversion tests in the presence of these prepared catalysts were carried out in a microreactor, using toluene as the tar model component. The catalysts were characterized before and after the reactor runs [using X-ray diffraction (XRD), temperature-programmed reduction (TPR), and Mossbauer spectroscopy]