Utilization of sargassum based activated carbon as a potential waste derived catalyst for low temperature selective catalytic reduction of nitric oxides
Utilization of sargassum based activated carbon as a potential waste derived catalyst for low temperature selective catalytic reduction of nitric oxides
复制标题
利用马尾藻基活性炭作为潜在的废物衍生催化剂用于低温选择性催化还原一氧化氮
DOI：
10.1016/j.fuel.2015.07.045
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发表时间：
2015-11-15
期刊：
影响因子：
7.4
通讯作者：
Li, Sujing
中科院分区：
文献类型：
--
作者：
Li, Wei;Tan, Shan;Li, Sujing
以马尾藻（SAC）为原料，在50 ~ 250℃的温度范围内，作为NH3选择性催化还原NO （NH3- scr）的催化剂，考察了制备方法、磷酸浸渍比和表面氮官能团等重要工艺参数的影响。讨论了水（H2O）和二氧化硫（SO2）对C/SAC-2/U-6催化剂SCR活性的影响。采用brunauer - emmet - teller法（BET）、元素分析（EA）、傅里叶变换红外光谱（FTIR）和x射线光电子能谱（XPS）等分析技术对催化剂的结构性质、元素含量和含氮基团的分布进行了研究。实验结果表明，尿素改性的C/SAC-2/U-6样品比所有SAC样品和商品活性炭样品具有更高的NOx转化率，更好的N-2选择性和更宽的操作温度窗。此外，马尾藻衍生催化剂具有良好的耐水性和耐硫性，是一种很有前途的用于燃煤电厂NOx排放的NH3-SCR催化剂。(C) 2015 Elsevier Ltd.版权所有。
The use of activated carbon derived from sargassum (SAC), normally disposed as waste, has been examined as potential catalyst for selective catalytic reduction of NO with NH3 (NH3-SCR) in the temperature range of 50-250 degrees C. The influence of important process variables, such as preparation methods, phosphoric acid impregnation ratios and surface nitrogen functional groups, were investigated. The impacts of water (H2O) and sulfur dioxide (SO2) on the SCR activity of the C/SAC-2/U-6 catalyst were also discussed. An array of analytical techniques, including Brunauer-Emmett-Teller method (BET), Elemental Analysis (EA), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) were also employed to study the structural properties, elemental content, and distribution of nitrogen-containing groups of the catalyst prepared. Experimental results suggested that the urea modified C/SAC-2/U-6 sample exhibited higher NOx conversion, better N-2 selectivity and broader operation temperature window than all the SAC samples and the commercial activated carbon sample. Moreover, it has good water and sulfur tolerance, making the sargassum derived catalyst as a promising NH3-SCR catalyst for NOx emission from fired power plant. (C) 2015 Elsevier Ltd. All rights reserved.