IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v14y2017i12p1474-d120798.html
   My bibliography  Save this article

Effect of CaO on NO x Reduction by Selective Non-Catalytic Reduction under Variable Gas Compositions in a Simulated Cement Precalciner Atmosphere

Author

Listed:
  • Ye Sun

    (School of Space and Environment, Beihang University, Beijing 100191, China)

  • Weiyi Fan

    (School of Space and Environment, Beihang University, Beijing 100191, China)

  • Tianle Zhu

    (School of Space and Environment, Beihang University, Beijing 100191, China)

  • Xiaowei Hong

    (School of Space and Environment, Beihang University, Beijing 100191, China)

Abstract

High-concentration CaO particles and gas compositions have a significant influence on NO x reduction by selective non-catalytic reduction (SNCR) in cement precalciners. The effect of gas composition on NO x reduction by SNCR with NH 3 was studied in a cement precalciner atmosphere with and without CaO at 700–1100 °C. It was found that CaO significantly lowers NO x reduction efficiency between 750 °C and 1000 °C, which is attributed to the catalytic oxidation of NH 3 to NO. Although increasing NH 3 concentration was advantageous to NO x reduction, the existence of CaO led to the opposite result at 750–900 °C. Adding H 2 O can suppress the negative effect of CaO on NO x reduction. Decreasing O 2 content from 10% to 1% shifts the temperature range in which CaO has a significant effect from 750–1000 °C to 800–1050 °C. CO has a variety of influences on the CaO effect under different experimental conditions. The influences of NH 3 , H 2 O, O 2 , and CO on the effect of CaO can be attributed to the impacts of the gas compositions on gas-phase NH 3 conversion, gas-solid catalytic NH 3 oxidation, or both processes. A proposed pathway for the effect of gas compositions on NO x reduction in CaO-containing SNCR process was developed that well predicted the CaO-containing SNCR process.

Suggested Citation

  • Ye Sun & Weiyi Fan & Tianle Zhu & Xiaowei Hong, 2017. "Effect of CaO on NO x Reduction by Selective Non-Catalytic Reduction under Variable Gas Compositions in a Simulated Cement Precalciner Atmosphere," IJERPH, MDPI, vol. 14(12), pages 1-12, November.
  • Handle: RePEc:gam:jijerp:v:14:y:2017:i:12:p:1474-:d:120798
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/14/12/1474/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1660-4601/14/12/1474/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Bo Li & Jinyang Zhao & Junfu Lu, 2015. "Numerical Study of the Simultaneous Oxidation of NO and SO 2 by Ozone," IJERPH, MDPI, vol. 12(2), pages 1-17, January.
    Full references (including those not matched with items on IDEAS)

    Citations

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


    Cited by:

    1. Jia, Meng-Chuan & Su, Sheng & He, Li-Mo & Chen, Yi-Feng & Xu, Kai & Jiang, Long & Xu, Jun & Wang, Yi & Hu, Song & Xiang, Jun, 2023. "Experimental and density functional theory study on role of calcium in NO reduction by NH3 on char surface during ammonia co-firing with pulverized coal," Energy, Elsevier, vol. 285(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Xianping Luo & Qun Yan & Chunying Wang & Caigui Luo & Nana Zhou & Chensheng Jian, 2015. "Treatment of Ammonia Nitrogen Wastewater in Low Concentration by Two-Stage Ozonization," IJERPH, MDPI, vol. 12(9), pages 1-13, September.

    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:gam:jijerp:v:14:y:2017:i:12:p:1474-:d:120798. 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.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with 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: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    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.