Table 2 Thermodynamic values for reactions involved in the oxidation of brass slag [22]
From: Recycling of brass melting slag through the high-temperature oxidation-leaching process
Eq. no | Reaction | ∆H0 (kJ mol−1) | ∆G0 (kJ mol− 1) | ||||||
|---|---|---|---|---|---|---|---|---|---|
700 °C | 800 °C | 900 °C | 1000 °C | 700 °C | 800 °C | 900 °C | 1000 °C | ||
(2) | 2Zn + O2 (g) = 2ZnO | − 356 | − 356 | − 355 | − 355 | −251 | −240 | −229 | − 218 |
(3) | 2Cu + O2 (g) = 2CuO | −150 | −150 | − 149 | − 148 | − 69 | −60 | − 52 | − 44 |
(4) | Zn + CuO = ZnO + Cu | − 205 | − 206 | − 206 | − 207 | − 182 | −180 | − 177 | − 175 |