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An investigation into catalysts to improve the low temperature performance of an SCR

Xiao, Youhong and Zhou, P. and Zhang, Wenping (2009) An investigation into catalysts to improve the low temperature performance of an SCR. Proceedings- Institute of Marine Engineering Science and Technology Part a Journal of Marine Engineering and Technology, Part A (No. A1). pp. 19-26. ISSN 1476-1548

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    Abstract

    Selective catalytic reduction with NH3 is considered as one of the most effective technologies controlling NOx emission. Metal Fe based catalysts were used in the investigation to improve the low temperature performance of NOx conversion. The temperature range studied was between 150 degrees C and 350 degrees C with the interval of 50 degrees C. The honeycomb catalysts were prepared by an impregnation method. The study also included characterization of catalysts by BET, XRD, H2-TPR, SEM and XPS methods. It is found an increase in metal Fe content from 2 to 6 % wt. offers an improvement in the catalytic performance. However, a further increment in Fe content will result in a decrease in its performance. More than 90 % NOx conversion rate could be achieved over the Fe-based honeycomb catalyst at a low temperature by doping with Ni and Zr metal with different weights. Among all the catalysts studied, the mixed metal catalyst of Fe-Ni-Zr is found the most potential one, not only because of its higher NOx conversion rate at a low temperature, but also because of its wider operation temperature window. The effect of gas hourly space velocity (GHSV) was also investigated in the study and results show as GHSV increases that reduction of NOx is decreased.

    Item type: Article
    ID code: 13711
    Keywords: NH3-SCR, ceramic honeycomb, Fe-based catalysts, low temperature, naval engineering, Naval architecture. Shipbuilding. Marine engineering, Mechanical Engineering, Ocean Engineering, Electrical and Electronic Engineering, Fuel Technology
    Subjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering
    Department: Faculty of Engineering > Naval Architecture and Marine Engineering
    Related URLs:
    Depositing user: Mrs Thelma Will
    Date Deposited: 18 Dec 2009 13:05
    Last modified: 05 Sep 2014 00:18
    URI: http://strathprints.strath.ac.uk/id/eprint/13711

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