Low temperature SCR of NO with catalysts prepared by modified ACF loading Mn and Ce: Effects of modification method

被引：21
作者：
Li, Ping [1 ]
Lu, Pei [1 ,2 ]
Zhai, Yunbo [1 ]
Li, Caiting [1 ]
Chen, Ting [1 ]
Qing, Renpeng [1 ]
Zhang, Wei [3 ]
机构：
[1] College of Environmental Science and Engineering, Hunan University, Changsha
[2] Chinese Academy of Sciences, Institute of Chemistry, Beijing
[3] School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha
来源：
Environmental Technology (United Kingdom) | 2015年 / 36卷 / 18期
关键词：
ACF; modification; nitric oxide; selective catalytic reduction; sodium hydroxide;
D O I：
10.1080/09593330.2015.1031829
中图分类号：
学科分类号：
摘要：
Achievement of a higher NOx conversion ratio in selective catalytic reduction (SCR) at low temperature is challenging. In this work, pure activated carbon fibres (ACFs) were modified with different ratios of H2O (g), NaOH, CO2 and HNO3, respectively (named as modified ACF). The chemical and physical properties of modified ACFs were identified by Brunauer-Emmett-Teller, X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy methods. The NOx conversion ratio of ACF was improved from 56.1% to 82.4% at 80°C after modification with 30% (mass ratio) NaOH. These modified ACFs were further loaded with the mixture of MnO2 and CeO2 in the form of metal salt solutions (named as Mn0.5Ce0.5O2/modified ACF). The NOx conversion ratio of 30% SHACF remained similar at 80°C but was increased from 60.0% to 98.5% at 360°C after loading with Mn and Ce, which showed the best performance in SCR of NOx at low temperature. It could be seen that ACF delivered higher performance in low temperature SCR after being modified with the aforementioned reactants and further loading with metals. Based on chemical and physical characterization and the performance of the catalysts, the reasons for different performances of these catalysts in low temperature SCR are discussed. © 2015 Taylor and Francis.
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页码：2390 / 2400
页数：10
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