Containers gas mixtures

The reaction mechanism of SCR of NOx with decane on acid and iron-exchanged MFI-type zeolite was also investigated by operando FTIR spectroscopy and a special reactor cell enabling the use of water-containing gas mixtures. Brosius et al. found that water has a dramatic influence on the reaction pathway, while the formation of organic nitro and nitrite compounds does not proceed via chemisorbed states of NO, as observed in SCR with dry gases [174],... 

Silver acetylide is a more powerful detonator than the copper derivative, but both will initiate explosive acetylene-containing gas mixtures [1]. It decomposes violently when heated to 120-140°C [2], Formation of a deposit of this explosive material was observed when silver-containing solutions were aspirated into an acetylene-fuelled atomic absorption spectrometer. Precautions to prevent formation are discussed [3], The effect of ageing for 16 months on the explosive properties of silver and copper acetylides has been studied. Both retain their hazardous properties for many months, and the former is the more effective in initiating acetylene explosions [4],... 

The wet separation process, in which the pigment-containing gas mixture (Cl2, 02, and C02) is quenched in water, has not become established. 

An oxygen-containing gas mixture at 1 00 atm is subjected to the action of yellow phosphorus, which removes the oxygen In this way it is found that oxygen makes up 35 0% by volume of the mixture What is the partial pressure of 02 in the mixture0... 

The growth of filamentous carbon along with the gas phase product analysis has been used to determine the influence of sulfur on the iron catalyzed decomposition of carbon containing gas mixtures at 600°C. Pretreatment of the metal in H2S was found to initially suppress the reactions leading to carbon deposition from the decomposition of CO/H2 mixtures. After a short time the activity was restored to approximately the same level as that exhibited by an unadulterated iron powder, suggesting that most of the sulfur atoms were being removed from the surface. The small residual fraction of adatoms did, however, induce modifications in the structural characteristics of the filamentous carbon deposit and also altered the reactivity pattern of the iron towards decomposition of a CO/C2H4/H2 mixture. 

Gas Analysis.—One use of it is in gas analysis for the determination of oxygen. When air or an oxygen containing gas mixture is passed through an alkaline solution of pyrogallol all of the oxygen is... 

Figure 11.6. Oxidation of Fe(II) and Mn(II) by oxygen. All experiments were conducted with dissolved Fe(II) or Mn(II) concentrations of less than 5 x 10 M. In each series of experiments, the pH was controlled by continuously bubbling CO2- and O2-containing gas mixtures through HCOJ solutions of known alkalinity, (a) Oxygenation of Fe(II) in bicarbonate solutions, (b) Removal of Mn(II) by oxygenation in bicarbonate solutions, (c) Oxidation of Mn(II) in HCOs solutions autocatalytic plot, (d) Effect of pH on oxygenation rates, (e) Oxidation rate of ferrous iron as a function of pH. At low pH the oxidation rate is independent of pH, while in the higher pH range equation 13 (second-order dependence on [OH ]) is fulfilled. (From Singer and Stumm, 1970. More recent data by Millero et al., 1987.)...

Relatively less attention has been given to the desulfurization of steam-containing gas mixtures with low H2S at medium temperature suitable for desulfurization of reformate from the reforming, where the temperature of the fuel gas at the outlet of the steam reforming is about 700 °C and at the inlet of high-temperature water-gas shift (HTWGA) is about 400 °C. 

Novochinskii, I., Song, C.S., Ma, X.L., Liu, X.S., Shore, L., Lampert, J., and Farrauto, R.J. Low-temperature H2S removal from steam-containing gas mixtures with ZnO for fuel cell application. 1. ZnO particles and extrudates. Energy Fuels, 2004, 18, 576. 

The Atmosphere. Industrial carburization of tungsten powder is commonly carried out in hydrogen or hydrogen-containing gas mixtures. Hydrogen reacts with the solid carbon in the W -H C mixture to form methane (at temperatures <1600°C) or acetylene (>1600°C), which transport the carbon in tungsten-carbon black mixes over larger... 

The Chemical Vapor Reaction (CVR) Process (H. C. Starch) [9.21]. The process is based on chemical vapor reaction between a metal-containing compound (for example tungsten hexachloride) and a carbon-containing gas mixture (for example CH4/H2). The principle has been known for many years (see also Section 3.5.4), but has only been realized recently on a technical scale. The aim of the process is to produce a very fine (3-500 nm), homogeneous powder with a narrow particle size distribution. 

The two bulb diffusion cell is a simple device that can be used to measure diffusion coefficients in binary gas mixtures. Figure 5.3 is a schematic of the apparatus. Two vessels containing gas mixtures with different compositions are connected by a capillary tube. At the start of the experiment (at t = 0), the valve is opened and the gases in the two bulbs allowed to diffuse along the capillary tube. Samples from each bulb are taken after some time and this information is used to calculate the binary diffusion coefficient. 

Tetrahydrophthalic anhydride can be obtained in a good yield from maleic anhydride and the butadiene-containing gas mixture which is formed during the... 

Different types of model gas tests were performed. Standard light-off and dynamic sweep test methods were applied for the activity comparison [13], furthermore the formation of secondary emissions such as NH3 and N2O was investigated in separate test cycles [14]. Parts of the tests were performed with S02-free and others with SO2 containing gas mixtures. 

Reaction (1) is the most important step in the sequence of chain reactions in CVD processes which lead to the conversion of Silrh to Si02 layers. It is also critically important for the determination of the flammability and explosion limits and induction times of SiH4-containing gas mixtures, issues of utmost concern for industrial applications. " The key question is whether the reaction products can be explained by the proposed channels... 

Calcium, strontium and barium each have slightly different impacts on the properties of the perovskite. This is due, in part, to the difference in ionic radii of the ions. Calcium has a radius of 1.36 A, whereas the radii of strontium and barium are 1.44 and 1.65, respectively. Thus barium-containing perovskites have a more open crystal lattice and thus have a higher ionic conductivity compared to strontium- and calcium-based materials. However, barium is more reactive towards C02-containing gas mixtures and forms barium carbonate very readily. 

Experimental results show that Mg +, Ce + -modified Cu-ZSM-5 catalysts are more active than unpromoted Cu/ZSM-5 for the NO decomposition to nitrogen and oxygen, both in 02-frce or 02-containing gas mixtures. The cocations are able to... 

J. W. Simmons, S. Kulkami, and 0. M. Ekiner. Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes. US Patent 7 025 804, assigned to L Air Liquide, Societe Anonyme A Directoire et Conseil De Surveillance Pour L Etude et L Exploitation Des Procedes Georges Claude (Paris, FR) N/A (, April 11, 2006. 

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