Gas mixtures uses for

This should be eonsulted for the eolour eoding of gas mixtures used for inhalation e.g. medieal and breathing apparatus mixtures eontaining oxygen. 

Neumann and Jacob,72 on the other hand, found very small amounts of carbon dioxide formed even at 450° C. This difference in results is largely due to difference in composition of the gas mixture used for the synthesis. When hydrogen is present in greater proportion than is called for by the theoretical 1 3 ratio for reaction (b), as was the case with Neumann and Jacob s work, reaction (b) tends to predominate and when the ratio is nearer 1 1, carbon monoxide to hydrogen, reaction (a) predominates. 

The device used for measuring catalyst activities has been described previously [9,10]. The composition of the gas mixture used for tliese tests, which were carried out at and near stoichiometry, is shown in Table 1. 

Composition of Sour Gas Mixture Used for Equilibrium Ratio Comparisons Yarborough (15) ... 

Lan and Mottola [14] have presented two continuous-flow-sensing strategies for the determination of C02 in gas mixtures using a special reaction cell. Both approaches are based on the effect of the complex of Co(II) with phthalocyanine as a rate modifier of the CL emission generated by luminol in the absence of an added oxidant agent, which is enhanced by the presence of C02 in the system. This enhancement allows the fast and simple determination of carbon dioxide at ppm levels (v/v) in atmospheric air and in human breath. In the first case, a continuous monitoring system was applied however, because the flow of expired gas is not constant, a discrete sample introduction approach was used in the analysis of C02 in breath. 

In commercial operations of the dewaxing step, the mixture of wax-bearing oil and solvent is heated to ensure complete solution of the wax and is then passed through exchangers and chillers to totally enclosed rotary drum filters at a temperature about 10° to 15° F. below the desired pour point of the dewaxed oil. Vacuum for filtration is applied to the filtrate receiving vessel. The wax cake on the filter is washed with cold solvent, to remove the occluded oil-solvent solution. Sulfur dioxide superheated gas is used for stripping the solvent from the oil-solution and the wax phase, and the last traces of solvent are removed under vacuum. 

A 20% polyethylene glycol succinate on Kieselguhr column (1.2 m, 443 K, 50 ml min helium carrier gas) was used for GC analyses. Deuterium-labelled compounds were analysed by NMR spectroscopy (JEOL C 60-HL equipment) after separation with a Carlo Erba Mod P preparative GC. Mass spectrometric analyses of the reaction mixtures were carried out with a Hewlett Packard 5890A GC instrument (25 m HP-20M column, 353-473 K) coupled with a 5970 MSD quadrupole mass spectrometer (El source, 70 eV, 1-s scans, HP 59970 MS ChemStation data system). 

The explanation of Graham s law given by Hoogschagen is not complete, as subsequent authors (17,18) stated. However, the attempts of these authors to give a more complete explanation for the law are not convincing. It is known that at conventional measurements of diffusion coefficients in binary gas mixtures using wide capillaries, equal velocities of counterdiffusion of the components are observed. From the considerations developed... 

Table II lists the feed gas compositions used for the study to determine the effects of feed composition on membrane performance. The different compositions are representative of diving gas mixtures used at various depths. Both the individual component permeabilities and the mixture permeabilities were evaluated at several different pressure drops up to 1200 psig feed pressure.

Manometers consisting of liquid columns of, commonly, mercury or a fluid such as silicone oil, have been used extensively in the past to measure gas mixtures in, for example, experimental, static investigations of the overall kinetics of gas-phase reactions. They continue to be used in many applications, including the establishment of primary pressure standards in several countries. 

It is common in natural-gas engineering to calculate the viscosity of a sour gas mixture using a two-step procedure. First, you estimate the viscosity of a sweet gas at the temperature and pressure of interest. This viscosity is corrected for the presence of hydrogen sulfide and carbon dioxide. Such correlations are usually limited to a small amount of acid gas and thus are not applicable to acid gas mixtures. Therefore, a different approach must be used for acid gas. 

In the next reactor design [48] mixer arms have exactly the same dimensions and shape as the internal reactor part and in the course of the run coke residue is scraped by mixer arms from the heated reactor walls. Scraped coke falls down and is collected at the bottom of the reactor and removed with part of the reaction mixture by a suction pipe. The main process products are the gas fraction (used for heating purpose), gasoline and light gas oil and paraffin fractions. 

The first case-study selected for assessment of process performance is the bulk separation of a 50/50 H2(4)/CH4(R) gas mixture using a PSA with activated carbon as the adsorbent, coupled to a membrane with selectivity (Xab - 35. The values of the parameters of the PSA model are given in and are not reproduced here to save space . The standalone models for the membrane and PSA unit were validated by comparing numerical results with experimental data reported in the literature . For the separation under study the integrated system attained the CSS after the 11 cycle from startup for all runs. Unless otherwise stated, the operating conditions considered are Ph/Pl = 35/1.2, = 2500cm F(total feed/cycle) =... 

This method of analysis was also used by Dubinin for the determination of chloropicrin in the gas mixtures prepared for the testing of activated carbons. 

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