Akademik Veri Yönetim Sistemi
Fuel, cilt.86, sa.7-8, ss.983-992, 2007 (SCI-Expanded)
In this study in which the Taguchi method was used, the optimization of sulphur removal by H2O2/H2SO4 solutions was carried out over lignite with higher content of sulphur from Artvin/Yusufeli, Turkey. In experiments, the ranges of experimental parameters were between 0.25 and 6.0 mol L-1 for H2O2 concentration, 0.25-4 mol L-1 for H2SO4 concentration, 10-60 °C for reaction temperature, 0.01-0.08 g mL-1 for solid-to-liquid ratio, 15-120 min for reaction time, 200-300 rpm for stirring speed and 710-120 μm for particle size. The optimum conditions for these parameters have found to be 60 °C of temperature, 0.06 g mL-1 of solid-to-liquid ratio, 60 min of reaction time, 250 rpm of stirring speed and -250 + 180 μm of particle size. A statistical experimental arrangement, L25(56) was prepared to determine optimum sulphur removal and ash removal ratios. The obtained yields were 97.85% in removal of total sulphur, 56.54% in removal of pyritic sulphur, 21.33% in removal of organic sulphur and 61.52% in removal of ash. According to variance analysis, it was seen that all parameters were effective in removal of pyritic and total sulphur, reaction temperature, solid-to-liquid ratio, reaction time, stirring speed, H2O2 and H2SO4 concentrations in removal of organic sulphur, and other parameters except acid concentration in removal of ash. © 2006 Elsevier Ltd. All rights reserved.