活性焦干法联合脱硫脱硝的正交实验

采用正交实验,结合SEM和XPS等表征手段,研究了空速、温度、烟气中NO,SO₂的浓度等因素对含氨活性焦硫容和脱硝量的影响.结果表明,NO和SO₂之间存在着竞争吸附,SO₂优先吸附在活性焦上;NO的脱除主要是NO和NH₃的催化还原反应,SO₂的脱除是活性焦的直接催化和部分硫铵的产生;影响脱硫脱硝的主要因素是反应温度;最佳工艺条件是：空速4 500 h^-1、温度130 ℃、NO与SO₂浓度分别为0.15%和0.10%,此时硫容为152.82 mg/g,脱硝量为57.88 mg/g.

Orthogonal test on combined desulphurization and denitration by activated char

The orthogonal design method, SEM and XPS were introduced in the experiment. The influence of space velocity, react temperature, the concentrations of NO and SO2 on removal efficiencies of NO and SO2 were examined. The experimental results show that the competitive adsorption on activated coke contained NH3 exists between SO2 and NO, and SO2 takes priority of NO on activated coke; NO is removed by selective catalytic reduction with NH3, and SO2 is removed by direct catalysis and producing ammonium sulphate on activated coke. The reaction temperature is the key factor to decide the ability of desulphurization and denitration on activated coke. The optimum condition is that space velocity, react temperature, the concentration of NO and SO2 are 4 500 h-1, 130 ℃, 0.15% and 0.10% respectively, at which the SO2 adsorption capacity and the removal capacity of NO are 152.82 and 57.88 mg/g respectively.