Nitrogen dioxide description

London. On the second day, the late afternoon peak exceeded 0.1 ppm. It is apparent that some conversion of nitric oxide to nitrogen dioxide was responsible for the ozone buildups, but it is not as clear a chemical pattern for London as it is for cities in the western United States. The paper did not mention the method of ozone measurement however, qualitative descriptions of the weather patterns suggest that the days of high ozone were characterized by light winds and considerable sunlight. 

Descriptions of field studies of power-plant stack plumes were given by Davis et al. The ozone concentration appears to be lower in regions of high sulfur dioxide content. At 32 km downwind from the stacks, it was claimed that the ozone concentration in the plume (now 11 km wide) is higher than the ambient concentration ( 0.08 ppm) by approximately 0.02 ppm. Simultaneous measurements of nitric oxide and nitrogen dioxide were integrated across the plume. Values of the ratio of nitric... 

The oxidation of cyclohexanone by nitric acid leads to the generation of nitrogen dioxide, nitric oxide, and nitrous oxide. The first two gases can be recycled for the synthesis of nitric acid. Nitrous oxide, however, is an ozone depleter and cannot be recycled. Indiscriminate nitrous oxide emission from this process is therefore the cause of considerable concern. As shown by 8.9, part of the cyclohexanone can also be converted to the corresponding oxime and then to caprolactam—the monomer for nylon 6. Phthalic acids are one of the monomers for the manufacture of polyesters. As shown by Eq. 8.10, it is made by the oxidation of p-xylene. A general description of polyamides (nylons) and polyesters are given in Section 8.4. 

Shy, C.M., J.P.Creason, M.E.Pearlman, K.E.McClain, F.B.Benson, and M.M.Young. 1970a. The Chattanooga school children study Effects of community exposure to nitrogen dioxide. I. Methods, description of pollutant exposure, and results of ventilatory function testing. J. Air Pollut. Control Assoc. 20(8) 539-545. 

There continue to be many absorbers for the removal of water-soluble gases. Acid gases and some volatile organic compounds can be absorbed readily in water by the types of equipment previously discussed. These processes are essentially absorption with chemical reaction. For a discussion of absorption in air pollution control and a description of several absorption systems for sulfur dioxide and nitrogen oxide removal, see Schnelle and Brown. A more detailed discussion of many more processes for flue gas desulfurization employing absorption is given by Lunt and Cunic. ... 

This Section Ls restricted to a description of some of the work of Ander-gon, 8-a> who has ably applied the quantitative analysis of vapors by infrared spectroscopy to analytical problems in carbohydrate chemistry, principally to the Zeisel alkoxyl determination. In this particular application, the usual Zeisel apparatus was used, and the volatile iodide liberated was carried by a flow of nitrogen into a cold trap where it was collected quantitatively Anhydrone (magnesium perchlorate) was used for removing water vapor which would otherwise interfere in the spectrum. The contents of the trap were allowed to vaporize into an evacuated gas-cell, and air was then admitted through the trap to sweep all the vapor into the gas-cell. Double-beam compensation of atmospheric water vapor and carbon dioxide was not upset by this procedure, which also served the purpose of increasing the sensitivity of the infrared method by the well known pressure-broadening effect. The complete spectrum of the vapor... 

The line slope is -0.4960 The % Conilation factor is 99.9776 GAS CHROMATOGRAPHIC CONDITIONS Instrument Type Varian 6000 TCD Carrier Gas Helium Detector 0 TCD x 0.5 Detector TCD X 0.5 Injection Size CSV 0.5 ml LSV 0.2 uL Operating Conditions Isothermal at 115 C Column Description 30 x 1/8" DC-200/500 on Chrom PAW 80/100 mesh GAS CHROMATOGRAPHIC RETENTION ORDER Time Component Area 2.00 Nitrogen 119879 2.14 Methane 3582650 2.52 Caibon Dioxide 158657 2.80 Ethane 507744 3.78 Propane 325695 4.97 Isobutane 310334 5.83 n-Butane 307670 8. 50 Isopentane 177221 9.63 n-Pentane 183160 16.76 n-Hexane 19084 28.75 Heptanes Plus 20897 support package that it provides can a user have all the information necessary to support their analysis. 

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