Activation of anthracite combustion by copper acetate: mechanism, effect of particle size and introduction method

Abstract This paper addressed the effect of copper acetate on combustion characteristics anthracite depending fractional composition fuel and additive introduction method. Anthracite was impregnated with 5 wt% Cu(CH 3 COO) 2 by mechanical mixing incipient wetness impregnation. Four samples different fraction d < 0.1 mm, = 0.1–0.5 0.5–1.0 1.0–2.0 mm were compared. According to EDX mapping, impregnation provides a higher dispersion its uniform distribution in sample. The ignition modified studied thermal analysis high-speed video recording processes chamber (at heating medium temperature 800 °C). It found that increases reactivity, which evidenced decreased onset (Δ T i ) 35–190 °C reduced delay time τ 2.1–5.4 s. Copper reduces underburning (on average 70%) ash residue decreases amount CO NO x gas-phase products 18.5% 20.8%, respectively). mechanism for activation is proposed.