摘要
低共熔溶剂广泛应用于很多领域,尤其在气体净化领域有很好的应用前景。为探究吸收容量大、再生能力较强的低共熔溶剂协同吸收烟气中SO2和NO的性能,采用氯化亚铁(FeCl2)、乙二醇(EG)与四丁基溴化铵(TBAB)制备络合亚铁乙二醇-四丁基溴化铵低共熔溶剂[Fe(Ⅱ)EG-TBAB DESs],重点考察了温度、停留时间、氧气分压和FeCl2浓度等因素对低共熔溶剂脱除烟气中SO2和NO性能的影响。结果表明:在温度为50℃、氧气分压为5%、FeCl2浓度为0.1mol/L的条件下,Fe(Ⅱ)EG-TBAB DESs能够协同高效吸收烟气中的SO2和NO。烟气中H2O和O2存在的条件下,SO2气体能够形成HSO-3和HSO-4,进一步促进Fe(Ⅱ)EG-TBAB低共熔溶剂吸收烟气中NO气体,生成Fe(Ⅱ)EG-TBAB(NO)。低共熔溶剂经6次吸收-脱附再生循环后其脱硫脱硝能力变化不大,仍保持较好的脱硫脱硝稳定性。
Deep eutectic solvents(DESs)are widely used in many fields,especially in the field of gas purification.To investigate the synergistic absorption performance of the DESs with high absorption capacity and strong regenerative capacity to absorbing SO2 and NO in flue gas,Fe(Ⅱ)EG-TBAB DESs was prepared by using ferrous chloride(FeCl2),ethylene glycol(EG)and tetrabutyl ammonium bromide(TBAB).Effect of temperature,residence time,oxygen partial pressure and concentration of FeCl2 on the removal of NO in the flue gas were investigated.The inlet and outlet concentration of SO2 and NO at the spray scrubber reactor were measured using online flue gas analyzer to characterized desulfurization and denitrification performance of Fe(Ⅱ)EG-TBAB DESs.The results showed that under the condition of 0.1mol/L FeCl2,temperature of 50℃,the oxygen partial pressure of 5%,Fe(Ⅱ)EG-TBAB DESs showed the best desulfurization and denitrification performance.The presence of H2O and O2 in the flue gas,SO2 gas can form HSO-3 and HSO-4,to further promote the absorption of NO in Fe(Ⅱ)EG-TBAB DESs,resulting in the formation of Fe(Ⅱ)EG-TBAB(NO).After sixth absorption-desorption cycles,the desulfurization and denitrification capacity of the samples have no obviously changed and show good desulfurization and denitrification stability.
作者
窦金孝
赵永奇
段晓谞
柴红宁
余江龙
DOU Jinxiao;ZHAO Yongqi;DUAN Xiaoxu;CHAI Hongning;YU Jianglong(Key Laboratory for Advanced Coal and Coking Technology of Liaoning Province,School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2020年第2期453-460,共8页
Chemical Industry and Engineering Progress
基金
国家自然科学基金青年基金（21607068）
辽宁科技大学优秀人才培养项目（2019RC12）
辽宁科技大学青年基金（2016QN27）
