Co-adsorption of nitrogen monoxide and nitrogen dioxide in zeolitic de-NOx catalysts

1994 ◽  
Vol 28 (2-4) ◽  
pp. 119-130 ◽  
Author(s):  
B. J. Adelman ◽  
G. -D. Lei ◽  
W. M. H. Sachtler
Keyword(s):  
Nitrogen Dioxide ◽  
Co Adsorption ◽  
Nitrogen Monoxide ◽  
Adsorption Of Nitrogen

scholarly journals Air pollution by nitrogen oxides in Sarajevo from 2005 to 2010

2013 ◽  
Vol 3 (3) ◽  
pp. 250-254
Author(s):  
Suad Habeš ◽  
Zarema Obradović ◽  
Aida Ridžal ◽  
Asmir Aldžić
Keyword(s):  
Air Pollution ◽  
Nitrogen Oxides ◽  
Positive Result ◽  
Nitrogen Dioxide ◽  
Total Concentration ◽  
Nitrogen Monoxide ◽  
Atmospheric Conditions ◽  
Measuring Point ◽  
Limit Values ◽  
Research Show

Introduction: Air pollution occurs when the concentration of certain substances (pollutants) reaches a size which causes its toxicity, or in other words, begins to cause harm to human health, fl ora and wildlife.Methods: Measurements were performed in the period from 2005 to 2010, at the measuring point Bjelave-Sarajevo by the method of Griess-Saltzmann. It encompasses the following parameters: NO, NO2, NOx, measured concentrations of pollutants in the atmosphere reduced to normal atmospheric conditions of 293 K (Kelvin) and pressure of 101.3 kPa (kilopascal).Results: NO concentration in the period from 2005 to 2008 was above the permitted value, but the results of research in the period between 2009 and 2010, have shown that there was a decrease in NO concentration in the atmosphere. Measurements show that the concentration of this pollutant is currently declining, which is a positive result compared to the pollution of the atmosphere by nitrogen monoxide. Furthermore, the results of the research showed that the concentration of NO2 for the period of 2005 to 2010, is in the limited values, and that has a decreasing trend, which is also a positive result compared to the pollution of the atmosphere by nitrogen dioxide. Related to the total concentration of NOx in the atmosphere, the results of the research show that their representation corresponds to the limit values existing in the Rulebook on limit values for air quality.Conclusion: The results of the research for the pollution of the atmosphere by nitrogen oxides in the investigated area show that the amount of nitrogen oxides in the atmosphere is in constant decline.

Reactions of Nitrosoarenes with Nitrogen Monoxide (Nitric Oxide) and Nitrogen Dioxide: Formation of Diarylnitroxides

2008 ◽  
Vol 2008 (19) ◽  
pp. 3279-3285 ◽  
Author(s):  
Paola Astolfi ◽  
Patricia Carloni ◽  
Elisabetta Damiani ◽  
Lucedio Greci ◽  
Milvia Marini ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Dioxide ◽  
Nitrogen Monoxide

Coordinative interaction between nitrogen oxides and iron–molybdenum POM Mo72Fe30

2019 ◽  
Vol 48 (20) ◽  
pp. 6984-6996 ◽  
Author(s):  
Kirill V. Grzhegorzhevskii ◽  
Margarita O. Tonkushina ◽  
Andrei V. Fokin ◽  
Ksenia G. Belova ◽  
Alexander A. Ostroushko
Keyword(s):  
Nitrogen Oxides ◽  
Nitrogen Monoxide ◽  
Argon Atmosphere ◽  
Ambient Conditions ◽  
Adsorption Of Nitrogen

The process of adsorption of nitrogen monoxide and dioxide by the giant Keplerate nanocluster Mo72Fe30 was studied in detail under ambient conditions and air/argon atmosphere.

THEORETICAL STUDY OF NITROGEN MONOXIDE ADSORPTION ON RHODIUM CLUSTERS AT DIFFERENT SITES

2008 ◽  
Vol 07 (04) ◽  
pp. 669-679 ◽  
Author(s):  
JIAN CHEN ◽  
KAI TAN ◽  
MENG-HAI LIN
Keyword(s):  
Density Functional ◽  
Nitrogen Monoxide ◽  
Density Functional Theory Calculations ◽  
Frontier Orbitals ◽  
Functional Theory ◽  
Orbital Interactions ◽  
Adsorption Sites ◽  
Rhodium Clusters ◽  
Adsorption Of Nitrogen ◽  
Back Donation

The adsorption of nitrogen monoxide NO with charged and neutral [Formula: see text] clusters at atop, bridge, and threefold hollow sites had been investigated by density functional theory calculations. The results showed that rhodium clusters had strong orbital interactions with NO and formed the complex [ Rh n NO ]-/0/+. The stretching vibrational frequencies of the N–O bonds changed with the different adsorption sites and clusters sizes. The interactions between rhodium clusters and NO molecular could be described through the donation and back-donation of their frontier orbitals. The more back donation from Rh to NO , the weaker the N–O bonds, exhibiting that the lengthening of the N–O bond length and the lowering of its vibrational frequency. In general, the donation and back-donation interactions followed the tendencies: anionic > neutral > cationic, big size > small size, threefold hollow site > bridge site > atop site.

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