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FeⅡEDTA络合-Na2SO3还原吸收NO性能

张先龙 孟凡跃 吴琼 吴雪平 郭亚晴

张先龙, 孟凡跃, 吴琼, 吴雪平, 郭亚晴. FeⅡEDTA络合-Na2SO3还原吸收NO性能[J]. 环境科学研究, 2016, 29(12): 1847-1856.
引用本文: 张先龙, 孟凡跃, 吴琼, 吴雪平, 郭亚晴. FeⅡEDTA络合-Na2SO3还原吸收NO性能[J]. 环境科学研究, 2016, 29(12): 1847-1856.
ZHANG Xianlong, MENG Fanyue, WU Qiong, WU Xueping, GUO Yaqing. Experimental Study on Complexing Absorption of NO Using FeⅡEDTA Solution and Reduction with Na2SO3 Solution[J]. Research of Environmental Sciences, 2016, 29(12): 1847-1856.
Citation: ZHANG Xianlong, MENG Fanyue, WU Qiong, WU Xueping, GUO Yaqing. Experimental Study on Complexing Absorption of NO Using FeⅡEDTA Solution and Reduction with Na2SO3 Solution[J]. Research of Environmental Sciences, 2016, 29(12): 1847-1856.

FeⅡEDTA络合-Na2SO3还原吸收NO性能

基金项目: 国家自然科学基金项目(40902020,51002042);高等学校博士学科点专项科研新教师基金项目(120090111120019)

Experimental Study on Complexing Absorption of NO Using FeⅡEDTA Solution and Reduction with Na2SO3 Solution

  • 摘要: 为研究FeⅡEDTA络合-Na2SO3还原吸收NO性能,对制备参数〔pH、V(FeⅡEDTA)(FeⅡEDTA溶液用量)、初始c(FeⅡEDTA)、n(FeⅡ)∶n(EDTA)〕和操作条件〔温度、φ(O2)、烟气流量、入口ρ(NO)〕及SO32-〔以c(Na2SO3)计〕进行了考察,并采用FT-IR(傅里叶红外光谱仪)和Raman(拉曼光谱仪)等表征手段对吸收体系进行表征.结果表明:①pH和初始c(FeⅡEDTA)对NO络合吸收量影响较显著,V(FeⅡEDTA)和n(FeⅡ)∶n(EDTA)次之.在pH为3~9的范围内,NO络合吸收量先增加后降低,pH为7时达到最大(0.502 mol/mol);初始c(FeⅡEDTA)由0.005 mol/L增至0.025 mol/L,NO络合吸收量随之增加了0.198 mol/mol.②温度和φ (O2)的升高不利于NO吸收,当温度由30 ℃升至60 ℃、φ (O2)从0%增至6%,NO络合吸收量却分别降低了71.69%、63.3%;此外,烟气流量和入口ρ (NO)的增加对NO络合吸收量也无显著影响.③SO32-的存在显著提高了FeⅡEDTA高效络合NO吸收时间.结合试验结果确定最佳反应条件:pH为7、V(FeⅡEDTA)为550 mL、初始c(FeⅡEDTA)为0.020 mol/L、n(FeⅡ)∶n(EDTA)为1∶1.0、温度为30 ℃、烟气流量为900 mL/min、无氧、c(Na2SO3)为0.20 mol/L,此时,NO络合吸收量为1.099 mol/mol,NO最大脱除率达到96.98%.研究显示,溶液中n(FeⅡEDTA)∶n(NO)对络合吸收NO起到主导作用,同时SO32-对FeⅡEDTA(NO)还原作用是促进NO吸收的重要机制.

     

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出版历程
  • 收稿日期:  2016-02-06
  • 修回日期:  2016-08-21
  • 刊出日期:  2016-12-25

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