Inert gas mixtures

In addition to chemical synthesis and enhanced oil recovery, gaseous carbon dioxide is used in the carbonated beverage industry. Carbon dioxide gas under pressure is introduced into mbber and plastic mixes, and on pressure release a foamed product is produced. Carbon dioxide and inert gas mixtures rich in carbon dioxide are used to purge and fiH industrial equipment to prevent the formation of explosive gas mixtures. 

C. Bottcher, A. Dalgarno, and E. L. Wright. Collision-induced absorption in alkali-metal-atom-inert-gas mixtures. Phys. Rev., A 7 1606, 1973. 

Z. Gburski, C. G. Gray, and D. E. Sullivan. Higher-order spectral moments in collision-induced absorption Inert gas mixtures. Chem. 

Oxygen-Inert Gas Mixtures, Jet Propulsion Laboratory, Tech. Rept. 4 (1954). 

There is a discrepancy between the experimental and calculated values the former, we believe, exhibit some internal inconsistency. Table XII gives ka as 3 X 109-1010 sec.-1, depending on temperature (25 and 300°C.) and pressure. Heller and Gordon obtained a scatter of results for different techniques. With diethyl ketone-D2 (or H2) inert gas mixtures (1 15) they obtained ... 

The D addition system is more energetic, but there is an opposing secondary isotope effect from three D substituents. With ethylene-Z)2 inert gas mixtures (1 9) they obtained ... 

Fig. 3.3. Limits of flammability of various n-hexane-inert gas mixtures at 25°C and atmospheric pressure, courtesy Bureau of Mines)...

When inert gases are used as protective gas, they cause a sort of inertization in the flameproof enclosure. Reducing the oxygen concentration in a gas-oxygen-inert gas mixture down to values of 5... 12% (v/v) prevents ignition of this mixture [2]. So, things move to the safe side. ... 

Mahan and Solo studied the reaction in a stirred continuous flow reactor, in which O atoms produced by a microwave discharge through pure O2 or 02-inert gas mixtures reacted with CO. O atom concentrations were measured by titration with NO2. They found that radiation accompanied reaction 0.29 % of the time for the process at 298 °K, and concluded that the reaction was second-order. They proposed the mechanism... 

A. R. Penner, N. Meinander, and G. C. Tabisz. The spectral intensity of the collision induced rotational Raman scattering by gaseous CH and CH4-inert gas mixtures. Molec. Phys., 54 479 92 (1985). 

If the gas at the carbon electrode is diluted with an inert gas or with Hj or HjO, then at standard pressure we have P < 1 and the carbon plot is displaced upwards. Therefore the carbon precipitation from a water gas or a water gas, inert gas mixture starts at higher absolute values of the electrode potential. 

E. J. Ackerman, G. J. Koskinas, A model for predicting the permeation of hydrogen-deuterium-inert gas mixtures through palladium tubes, Ind. Eng. Chem. Fundam. 1972, 11(3), 332-338. 

The CO and inert gas mixture leaves the vessel approximately at the bath temperature. The CO mixture exiting the vessel is mixed with excess air in order to fully bum the CO to CO2 very early in the exhaust duct. This is done to prevent the presence of combustible or e q)losive mixtures persisting downstream into the duct to the filter equipment. 

D. Inert Gas Mixtures.—Gas-gas separation effects have also been observed in binary mixtures of inert gases. 

During a typical process cycle, the diisobutene conversion starts at about 75% and gradually declines. When the conversion reaches 50%, the catalyst system is regenerated using an air-inert gas mixture to control the temperature of the coke burn-off. Throughout the process, the selectivity to neohexene remains constant at c.a. 85%. 

The details of the crossed-beam apparatus used in our experiment can be found in many earlier publications [17,18]. Briefly, the alkali dimer source consisted of a resistively heated molybdenum oven and nozzle assembly, with the temperatures of the nozzle and the oven being controlled independently by different heating elements. Sodium vapour carried by an inert gas, which was either He or Ne, expanded out of the 0.2 mm diameter nozzle to form a supersonic beam of Na/Na2/inert gas mixture. The Na2 concentration was about 5% molar fraction of the total sodium in the beam when He was used as carrier gas. The beam quality dropped severely when we seeded Na2 in Ne so the dimer intensity became much weaker. No substantial amount of trimers or larger clusters was detected under our experimental conditions. The Na2 beam was crossed at 90 by a neat oxygen supersonic beam in the main collision chamber under single collision conditions. The O2 source nozzle was heated to 473 K to prevent cluster formation. Both sources were doubly differentially pumped. The beams were skimmed and collimated to 2 FWHM in the collision chamber. Under these conditions, the collision energies for the reaction could be varied from 8 kcal/mol to 23 kcal/mol. 

Consider pure water as an absorbent for SO2 over CO2 from an inert gas mixture. Obtain an expression for the separation factor of SO2 over CO2 defined by... 

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