Bifunctional mesoporous Cu-Al-MCM-41 materials for the simultaneous catalytic abatement of NOx and VOCs

Mani Karthik, Liang-Yi Lin, Hsun-Ling Bai*

*此作品的通信作者

研究成果: Article同行評審

78 引文 斯高帕斯(Scopus)

摘要

This study explored the possibility of using waste organic solvent as the source of volatile organic compound (VOC) and it served as a reducing agent of selective catalytic reduction (SCR) deNOx process, in which the VOC itself can be catalytically oxidized on the mesoporous Cu and/or Al substituted MCM-41 catalysts. The synthesized Cu-Al-MCM-41 catalysts were extensively characterized by powder low-angle X-ray diffraction (XRD), N2 adsorption-desorption measurements, transmission electron microscopy (TEM), UV-Visible diffuse reflectance spectroscopy (UV-Vis DRS), 27Al magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR), electron paramagnetic resonance spectroscopy (EPR) and inductively coupled plasma-mass spectrometer (ICP-MS) analysis. The XRD, TEM and N2 adsorption-desorption studies clearly demonstrated the presence of a well ordered long range hexagonal array with uniform mesostructures. The Cu-Al-MCM-41 materials showed a better long-term-stability than that of copper ion-exchanged H-ZSM-5 (Cu-ZSM-5) zeolite. The Cu-Al-MCM-41 material was found to be an efficient catalyst than that of Cu-MCM-41 without aluminum for the simultaneous catalytic abatement of NOx and VOCs, which was attributed to the presence of well dispersed and isolated Cu2+ ions on the Cu-Al-MCM-41 catalyst as observed by UV-Vis DRS and EPR spectroscopic studies. And the presence of aluminum (Al3+ ions) within the framework of Cu-Al-MCM-41 stabilized the isolated Cu2+ ions thus it led to higher and stabilized activity in terms of NOx reduction.

原文English
頁(從 - 到)153-160
頁數8
期刊Microporous and Mesoporous Materials
117
發行號1-2
DOIs
出版狀態Published - 1 1月 2009

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