文献类型：期刊文献

英文题名：Room temperature efficient reduction of NOx by H2 in a permeable compounded membrane - Catalytic reactor

作者：Shi, Nian[1];Tu, Bao-sheng[1];Sun, Wei[1];Liu, Ji-yuan[2,3];Cao, Li-mei[1];Gong, Xue-qing[2,3];Yang, Ji[1]

机构：[1]E China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Key Lab Adv Mat, Ctr Computat Chem, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2016

卷号：283

起止页码：929

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20153701276596);WOS:【SCI-EXPANDED(收录号:WOS:000364247100095)】；

基金：This research is based on work supported by the National Natural Science Foundation of China (22277045), Public welfare project of the Ministry of Environmental Protection (201309021), "Shu Guang" project of the Shanghai Municipal Education Commission and the Shanghai Education Development Foundation, and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：NOx; FGD; Waste gas treatment; Air pollution; Membrane reactor

摘要：A permeable compounded membrane-catalytic reactor is proposed and evaluated to remove NOx in simulated flue gas by H-2. The flue gas denitrification could be achieved at room temperature spontaneously without extra energy input. In the reactor, the reducing agent H-2 is recycled and separated from the simulated flue gas containing NO by a compounded membrane embedded with Pt-C catalyst, through which only H-2 could permeate to efficiently reduce NO. The relevant experimental data show that the NO removal could reach close to 100% at room temperature with the influent concentration from 218 ppm to 985 ppm, with a very short residence time of 0.09 s. The transmission electron microscopy (TEM) illustrates that the Pt nanoparticles are uniformly dispersed on carbon as cluster. The prepared Pt-C catalyst is described by Raman spectra, and further electron transfer from Pt to substrate carbon is observed via Xray photoelectron spectroscopy (XPS). It is proved via both experimental data and DFT calculations that the electronic structure of Pt is modified due to the strong interaction between Pt and carbon in the prepared catalyst, at the same time, the high surface area of carbon ensures efficient capture NO and H-2, which gives rise to synergetic chemical coupling effect accounting for the surprisingly performance of Pt/C catalyst coated on carbon paper. The effects of the operating parameters on the removal for the proposed reactor, such as the residence time, initial NO concentration, and NO:H-2 flow rate ratio, are also analyzed. (C) 2015 Elsevier B.V. All rights reserved.