Supercritical Water Gasification of Eucalyptus Wood Chips Using NiFe 2 O 4 as a Catalyst

Abstract

In this work, the supercritical water gasification of eucalyptus wood chips has been investigated in relation to reaction temperature and presence of catalyst. Experiments were performed in a batch reactor at 450 °C and 500 °C with two different feed concentrations. This work wanted to evaluate mainly the gases were formed during the reactions. The gas products were analysed by gas chromatography. According to the results, it was found that eucalyptus wood chips reacted to form mainly H 2 , CH 4 gases with little yield of CO 2 . Increasing the reaction temperature beyond 500 °C led to the increasing production of both CH 4 (around 31.1 mol%) and H 2 (up to 38 mol%) gases and the liquid sample and solid residue have decreased. Generally, this work suggests that the SCWG has improved significantly the production of H 2 but more experiments still necessary to verify the effects of other experimental parameters and to characterise the liquid sample and solid residue.