• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Evaluation of Fe(iii)EDTA reduction with ascorbic acid in a wet denitrification system
【24h】

Evaluation of Fe(iii)EDTA reduction with ascorbic acid in a wet denitrification system

机译：湿式反硝化系统中抗坏血酸还原Fe（iii）EDTA的评估

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The reduction of Fe( III )EDTA to Fe( II )EDTA is the core process in a wet flue gas system with simultaneous desulfurization and denitrification. Herein, at first, the reductant ascorbic acid (VC) was used for reducing Fe( III )EDTA. The feasibility of Fe( III )EDTA reduction with ascorbic acid was investigated at different Fe( III )EDTA concentrations, various pH values, diverse temperatures, and different molar ratios of VC to Fe( III )EDTA. The results showed that the Fe( II )EDTA concentration increased with an increase in the initial Fe( III )EDTA concentration. Furthermore, the reduction efficiency increased as the mole ratio of VC to Fe( III )EDTA was increased, and all the Fe( III )EDTA reduction efficiencies were close to 100% when the mole ratio was more than 0.5. On the other hand, an alkaline environment did not favor the conversion of Fe( III )EDTA by VC. The Fe( III )EDTA conversion slightly increased as the temperature was increased. Moreover, compared with other reduction systems, ascorbic acid (VC) was found to be more powerful in reducing Fe( III )EDTA, especially in air. In addition, VC only exhibited powerful ability in the conversion of Fe( III )EDTA to Fe( II )EDTA and hardly reduced Fe( II )EDTA–NO. Finally, the stoichiometry of Fe( III )EDTA reduction by ascorbic acid was derived. Thus, our study would offer a bridge between foundational research and industrial denitration using the combination of Fe( II )EDTA and VC.
机译：Fe（III）EDTA还原为Fe（II）EDTA是湿法烟气系统中同时脱硫和反硝化的核心过程。在此，首先，将还原剂抗坏血酸（VC）用于还原Fe（III）EDTA。研究了在不同的Fe（III）EDTA浓度，不同的pH值，不同的温度以及VC与Fe（III）EDTA的摩尔比不同的情况下，用抗坏血酸还原Fe（III）EDTA的可行性。结果表明，Fe（II）EDTA的浓度随初始Fe（III）EDTA浓度的增加而增加。此外，当VC与Fe（III）EDTA的摩尔比增加时，还原效率增加，并且当摩尔比大于0.5时，所有Fe（III）EDTA的还原效率都接近100％。另一方面，碱性环境不利于VC转化Fe（III）EDTA。随着温度的升高，Fe（III）EDTA的转化率略有提高。此外，与其他还原系统相比，抗坏血酸（VC）被发现在还原Fe（III）EDTA方面更有效，尤其是在空气中。另外，VC仅在Fe（III）EDTA向Fe（II）EDTA的转化中表现出强大的能力，而几乎不还原Fe（II）EDTA-NO。最后，得出了抗坏血酸还原Fe（III）EDTA的化学计量。因此，我们的研究将在基础研究与结合使用Fe（II）EDTA和VC的工业脱硝之间架起一座桥梁。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号