基于电解法的模拟船舶柴油机废气脱硝实验研究

采用离子膜电解槽电解NaCl溶液,研究制备阳极酸性氧化溶液及其对模拟烟气中NO的脱除效果。分别研究了电流密度、电解时间、Na Cl浓度等因素对阳极酸性氧化溶液理化性能(TOS浓度、pH)的影响。结果表明:随着电流密度、电解时间、NaCl浓度的增加,阳极酸性氧化溶液中TOS浓度近乎呈线性增加。但随着电解时间增加,pH却迅速降低,并趋于稳定(1.5~2)。随着阳极酸性氧化溶液中TOS浓度的增加,NO脱除率明显提高;当TOS浓度为700 mg·L~(-1)时,NO脱除率达到50.4%。随着阳极氧化溶液初始pH的降低,NO脱除率明显增加,当pH为6时,NO脱除率为38%。

NO removal from simulated marine diesel engine exhaust gas based on electrolysis method

The experiments were carried out using the ion-exchange membrane electrolysis cell with NaCl solution. The effects of various electrolytic conditions (current density, electrolysis time and the concentration of NaCl) on the properties of the anodic acid oxidation solution were investigated. As a strong oxidant, the anodic acid oxidation solution was used to remove NO from simulated flue gas. The effects of the properties of the anodic acid oxidation solution on the removal efficiency of NO were studied based on a scrubbing reactor. The result shows that, the concentration of TOS in the anode acidic solution increases linearly with the increase of any electrolytic conditions. While the pH value of the anodic acid oxidation solution decreases apparently at the beginning and then stabilizes. When increase the TOS concentration of the anode acidic solution, the NO removal efficiency is improved obviously. When the TOS concentration is 700 mg×L-1, the NO removal efficiency is 50.4%. Increasing the pH value of the anodic acid oxidation solution leads to a high NO removal efficiency. When the pH value is 6, the NO removal efficiency is 38%.