IDEAS home Printed from https://ideas.repec.org/a/eee/appene/v129y2014icp187-194.html
   My bibliography  Save this article

Nitrogen oxide absorption and nitrite/nitrate formation in limestone slurry for WFGD system

Author

Listed:
  • Zheng, Chenghang
  • Xu, Changri
  • Zhang, Yongxin
  • Zhang, Jun
  • Gao, Xiang
  • Luo, Zhongyang
  • Cen, Kefa

Abstract

Promoting the nitrogen oxide (NOx) absorption step is the major challenge for simultaneous removal of sulfur dioxide (SO2) and NOx in wet flue gas desulfurization. This paper studied NOx absorption and absorption product formation in limestone slurry. The effect of CaCO3 concentration, NOx composition, and SO2 and O2 concentration was investigated. A proposed reaction pathway of NOx absorption and conversion was developed based on the experimental results. NOx absorption is thought to involve two types of absorption pathways, namely, pure NO2 absorption and simultaneous NO and NO2 absorption. A positive correlation was found between CaCO3 concentration and NO2 absorption rate, and the best molar ratio of NO2/NOx in gas stream for NO absorption was 0.5. The main NOx absorption products were NO2− and NO3−. NO2− inhibits further NOx absorption and could be partially decomposed with release of NO, while NO3− has no obvious effect on NOx absorption. Nitrite can also be converted into nitrate through a reaction with dissolved oxygen. Addition of SO2 provides another NOx absorption pathway due to the reaction between S(IV) and NOx, which indicates the feasibility of simultaneously removing SO2 and NOx by wet scrubbing.

Suggested Citation

  • Zheng, Chenghang & Xu, Changri & Zhang, Yongxin & Zhang, Jun & Gao, Xiang & Luo, Zhongyang & Cen, Kefa, 2014. "Nitrogen oxide absorption and nitrite/nitrate formation in limestone slurry for WFGD system," Applied Energy, Elsevier, vol. 129(C), pages 187-194.
    • Handle: RePEc:eee:appene:v:129:y:2014:i:c:p:187-194
    DOI: 10.1016/j.apenergy.2014.05.006
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0306261914004826
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.apenergy.2014.05.006?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Zhu, Zihan & Zhou, Tao & Qin, Haotian & Zhao, Youcai & Xu, Bin, 2024. "A new integrated approach for NOx removal by absorption and anaerobic digestion of wasted activated sludge," Applied Energy, Elsevier, vol. 362(C).
    2. Si, Tong & Wang, Chunbo & Yan, Xuenan & Zhang, Yue & Ren, Yujie & Hu, Jian & Anthony, Edward J., 2019. "Simultaneous removal of SO2 and NOx by a new combined spray-and-scattered-bubble technology based on preozonation: From lab scale to pilot scale," Applied Energy, Elsevier, vol. 242(C), pages 1528-1538.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:appene:v:129:y:2014:i:c:p:187-194. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/description#description .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.