Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.40, sa.3, 2025 (SCI-Expanded, Scopus, TRDizin)
This study reports the reduction behavior of WO3 using waste polycarbonate (PC) as a reducing agent precursor. It aims to determine if the waste is recyclable in pyrometallurgy. The methodology presented here consisted of almost two simultaneous processes taking place in a two-zone furnace: Pyrolysis of the waste during heating to 800 K in Ar flow and the reduction of WO3 at 1300 K by the pyrolytic gas species such as H-2 and CH4. The thermodynamic analysis of the W-O-C-H-Ar system predicted that complete WO3 reduction to W was possible at 1300 K. The reactant mass ratio (mPC/mWO(3)) was varied up to 8. XRD patterns and mass measurements indicated that the WO2 content of the products decreased as the ratio was raised to 5. The product prepared at this ratio contained a single phase W. A minor W2C phase coexisted with W at higher ratios. W particle size increased with the extent of the oxide reduction possibly due to the deposition of W species from the gas phase on pre-reduced particles. This preliminary study demonstrates that waste PC is recyclable as a reducing agent precursor in pyrometallurgical applications.