Powdered activated coke (PAC) is a good adsorbent of SO₂, but its adsorption capacity is affected by many factors in the preparation process. To prepare the PAC with a high SO₂ adsorption capacity using JJ-coal under flue gas atmosphere, six parameters (oxygen-coal equivalent ratio, reaction temperature, reaction time, O₂ concentration, CO₂ concentration, and H₂O concentration) were screened and optimized using the response surface methodology (RSM). The results of factor screening experiment show that reaction temperature, O₂ concentration, and H₂O (g) concentration are the significant factors. Then, a quadratic polynomial regression model between the significant factors and SO₂ adsorption capacity was established using the central composite design (CCD). The model optimization results indicate that when reaction temperature is 904.74°C, O₂ concentration is 4.67%,H₂O concentration is 27.98%, the PAC (PAC-OP) prepared had a higher SO₂ adsorption capacity of 68.15 mg/g while its SO₂ adsorption capacity from a validation experiment is 68.82 mg/g, and the error with the optimal value is 0.98%. Compared to two typical commercial activated cokes (ACs), PAC-OP has relatively more developed pore structures, and its S_BET and V_tot are 349 m²/g and 0.1475 cm³/g, significantly higher than the 186 m²/g and 0.1041 cm³/g of AC1, and the 132 m²/g and 0.0768 cm³/g of AC2. Besides, it also has abundant oxygen-containing functional groups, its surface O content being 12.09%, higher than the 10.42% of AC1 and 10.49% of AC2. Inevitably, the SO₂ adsorption capacity of PAC-OP is also significantly higher than that of both AC1 and AC2, which is 68.82 mg/g versus 32.53 mg/g and 24.79 mg/g, respectively.

粉末状活性焦（PAC）是SO ₂的良好吸附剂，但其吸附能力受制备过程中许多因素的影响。为了在烟气气氛下使用JJ煤制备具有高SO ₂吸附能力的PAC ，六个参数（氧煤当量比，反应温度，反应时间，O ₂浓度，CO ₂浓度和H ₂ O浓度）为使用响应面方法（RSM）进行筛选和优化。因子筛选实验的结果表明，反应温度，O ₂浓度和H ₂O（g）浓度是重要因素。然后，使用中央复合设计（CCD）建立了重要因素与SO ₂吸附容量之间的二次多项式回归模型。模型优化结果表明，当反应温度为904.74℃，O ₂浓度为4.67％，H ₂ O浓度为27.98％时，所制备的PAC（PAC-OP）的SO ₂吸附容量为68.15 mg / g，而验证实验测得的SO ₂吸附量为68.82 mg / g，最佳值的误差为0.98％。与两种典型的商业活性焦（AC）相比，PAC-OP具有相对发达的孔结构及其S _BET和V _TOT是349米² / g且0.1475厘米³ /克，比显著越高186米² / g且0.1041厘米³ /克AC1，并且132米² / g且0.0768厘米³ AC2 / g的。此外，它还具有丰富的含氧官能团，其表面O含量为12.09％，高于AC1的10.42％和AC2的10.49％。不可避免地，PAC-OP的SO ₂吸附容量也显着高于AC1和AC2，分别为68.82 mg / g和32.53 mg / g和24.79 mg / g。