The as-received refuse material (RDF) was crushed and then sieved. The fraction in the range 0.15–1.2 mm was collected and characterized in terms of proximate and elemental analyses. Proximate analyses were performed in quadruplicate according to ASTM standards (D3173 for moisture, D3174 for ash, and D3175 for volatile matter), whereas elemental analyses were carried out using a Leco TruSpec Micro CHNS analyzer (Leco Corporation, USA). In addition, an ADVANT'XP + XRF spectrometer (Thermo ARL, Switzerland) was used to measure the ash composition on the basis of the weight fractions of the equivalent oxides (according to ASTM standard D4326-04). Table 1 lists the results from the above-mentioned analyses.