TY - JOUR
T1 - Selective catalytic reduction of NO using acetone solvent vapors as the reducing agent over Cu2+ and/or Al3+ ions substituted MCM-41 catalysts
AU - Karthik, Mani
AU - Bai, Hsun-Ling
PY - 2014/1
Y1 - 2014/1
N2 - Selective catalytic reduction (SCR) of nitrogen monoxide (NO) using acetone solvent vapors as the reducing agent over mesoporous Cu-MCM-41, Al-MCM-41, Cu-Al-MCM-41 and CuO supported metal oxides such as CuO/Al2O3 and CuO/SiO2 was investigated in this study. The synthesized materials were characterized by using powder low-angle X-ray diffraction (XRD), N2 adsorption-desorption measurements, 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 presence of isolated Cu2+ ions and tetrahedrally coordinated Al3+ ions within the framework of Cu-Al-MCM-41 catalyst played a vital role in this deNOx reaction as confirmed by EPR and 27Al MAS-NMR spectroscopic studies, respectively. Among the various catalysts studied, bifunctional Cu-Al-MCM-41 was found to be the most effective catalyst for achieving maximum deNOx activity at lower temperatures of around 250-350°C. Besides, Cu-Al-MCM-41 catalyst also showed higher acetone oxidation than those of Cu-MCM-41, CuO/Al2O3 and CuO/SiO2 catalysts in the entire temperature range. For higher temperature of above 400°C, it was found that Cu-MCM-41 catalyst shows highest activity for the NO reduction but it shows less acetone incineration activity as compared to that of Cu-Al-MCM-41 catalyst. The study of simultaneous removal of NO and acetone solvent vapors using Cu-Al-MCM-41 and Cu-MCM-41 catalysts reveals the potential of using waste organic solvents from industry as the reducing agent of deNOx (SCR) process.
AB - Selective catalytic reduction (SCR) of nitrogen monoxide (NO) using acetone solvent vapors as the reducing agent over mesoporous Cu-MCM-41, Al-MCM-41, Cu-Al-MCM-41 and CuO supported metal oxides such as CuO/Al2O3 and CuO/SiO2 was investigated in this study. The synthesized materials were characterized by using powder low-angle X-ray diffraction (XRD), N2 adsorption-desorption measurements, 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 presence of isolated Cu2+ ions and tetrahedrally coordinated Al3+ ions within the framework of Cu-Al-MCM-41 catalyst played a vital role in this deNOx reaction as confirmed by EPR and 27Al MAS-NMR spectroscopic studies, respectively. Among the various catalysts studied, bifunctional Cu-Al-MCM-41 was found to be the most effective catalyst for achieving maximum deNOx activity at lower temperatures of around 250-350°C. Besides, Cu-Al-MCM-41 catalyst also showed higher acetone oxidation than those of Cu-MCM-41, CuO/Al2O3 and CuO/SiO2 catalysts in the entire temperature range. For higher temperature of above 400°C, it was found that Cu-MCM-41 catalyst shows highest activity for the NO reduction but it shows less acetone incineration activity as compared to that of Cu-Al-MCM-41 catalyst. The study of simultaneous removal of NO and acetone solvent vapors using Cu-Al-MCM-41 and Cu-MCM-41 catalysts reveals the potential of using waste organic solvents from industry as the reducing agent of deNOx (SCR) process.
KW - Acetone
KW - Cu-Al-MCM-41
KW - Metal oxides
KW - Nitrogen oxides abatement
KW - Selective catalytic reduction
UR - http://www.scopus.com/inward/record.url?scp=84883636134&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2013.08.014
DO - 10.1016/j.apcatb.2013.08.014
M3 - Article
AN - SCOPUS:84883636134
SN - 0926-3373
VL - 144
SP - 809
EP - 815
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -