Abstract In order to design a compact urea selective catalytic reduction system, numerical simulation was conducted by computational fluid dynamics tool. A swirl type static mixer and a mixing chamber were considered as mixing units in the system. It had great influence on flow characteristics and urea decomposition into ammonia. The mixer caused flow recirculation and high level of turbulence intensity, and the chamber increased residence time of urea-water-solution injected. Because of those effects, reaction rates of urea decomposition were enhanced in the region. When those mixing units were combined, it showed the maximum because the recirculation zone was significantly developed. $ NH_{3} $ conversion was maximized in the zone due to widely distributed turbulence intensity and high value of uniformity index. It caused improvement of $ NO_{x} $ reduction efficiency of the system. It was possible to reduce 55% length of the chamber and connecting pipe without decrease of $ NO_{x} $ reduction efficiency.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical analysis of $ NO_{x} $ reduction for compact design in marine urea-SCR system


    Contributors:


    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Classification :

    BKL:    55.40 Schiffstechnik, Schiffbau / 50.92 Meerestechnik, Meerestechnik / 55.40 Schiffstechnik, Schiffbau, Schiffstechnik, Schiffbau / 50.92 Meerestechnik



    Numerical analysis of NOx reduction for compact design in marine urea-SCR system

    Cheolyong Choi / Yonmo Sung / Gyung Min Choi et al. | DOAJ | 2015

    Free access

    Marine urea cabin heating system and ship

    HUANG JUNCHEN / YU YEHUAN / ZHAO JUN et al. | European Patent Office | 2023

    Free access


    Design Optimization of Urea Injectors and Mixers in a Compact SCR System

    Jesu Martin, Leenus / V, Praveena | SAE Technical Papers | 2018