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An investigation into catalysts to improve low temperature performance in the selective catalytic reduction of NO with NH3

Xiao, Youhong and Zhou, Peilin and Zhang, W and Zhang, H. (2009) An investigation into catalysts to improve low temperature performance in the selective catalytic reduction of NO with NH3. Proceedings- Institute of Marine Engineering Science and Technology Part a Journal of Marine Engineering and Technology, 2009 (14). pp. 19-26. ISSN 1476-1548

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Selective catalytic reduction with NH3 is considered one of the most effective technologies controlling NOx emission. Metal Fe-based catalysts were used in the investigation to improve low temperature performance of NOx conversion. The temperature range studied was betweet 15 degrees C and 350 degrees C in increments of 50 degrees C. The honeycomb catalysts were prepared by an impregnation method. The study also included characterisation of catalysts by BET, XRD, H2-TPR and XPS methods. It was found that an increase in metal Fe content from 2 to 6% wt offered an improvement in the catalytic performance. However, a further increase in Fe content resulted 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 different weights of Ni and Zr metals. Amongst all the catalysts studied, the mixed metal catalyst of Fe-Ni-Zr was the one with most potential. This was because of its higher NOx conversion rate at a low temperature and also because of its wider operating temperature window. The effect of gas hourly space velocity (GHSV) was also investigated and the results showed that as GHSV increased, the reduction of NOx decreased.

Item type: Article
ID code: 35897
Keywords: catalytic reduction , marine engineering, NOx emission, 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
Depositing user: Pure Administrator
Date Deposited: 15 Nov 2011 15:38
Last modified: 11 Dec 2015 19:19
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