Effect of ammonium formate and mixtures of urea and ammonium formate on low temperatire activity of SCR systems

Anu Solla, Mårten Westerholm, Christer Söderström, Kauko Tomonen, Timo Härmä, Timo Nisinen, Jari Kukkonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    5 Citations (Scopus)

    Abstract

    The urea based SCR technology will face problems with the high freezing point (-11°C) of the reductant. In many parts of the world temperatures regularly fall much lower than this. With ammonium formate-urea solution the freezing point can be as low as - 30 °C. The reduction capacity of various ammonium formate solutions and its mixtures with urea were studied. When using ammonium formate and its mixtures as reductant in SCR experiments a significant improvement in the DeNOx activity in the low temperature operation was seen. In general in the engine experiments the ammonium formate-urea mixtures showed a reduction capacity comparable to standard urea.
    Original languageEnglish
    Title of host publicationSAE 2005 World Congress & Exhibition
    PublisherSociety of Automotive Engineers SAE
    Number of pages10
    DOIs
    Publication statusPublished - 2005
    MoE publication typeA4 Article in a conference publication
    EventSAE 2005 World Congress & Exhibition - Detroit, United States
    Duration: 11 Apr 200514 Apr 2005

    Publication series

    SeriesSAE Technical Paper Series
    Number2005-01-1856
    ISSN0148-7191

    Conference

    ConferenceSAE 2005 World Congress & Exhibition
    CountryUnited States
    CityDetroit
    Period11/04/0514/04/05

    Keywords

    • ammonium formate
    • SCR systems
    • diesel exhaust emission control

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