Argon feed mixture

Additional experimental data are summarized in Table III in order of increasing flow rate at NTP for the 2% CO, 3% O2 and 1% 1-butene in argon feed mixture. These experimental results in the regions of oscillations indicated that at fixed reactor space time, higher temperatures resulted in period and amplitude decreases for all components of the reacting system. At constant temperature, space time decreases also resulted in period and amplitude decreases. The time-averaged rates of oxidation of both CO and 1-butene increased with temperature and with reduction in space time. Reactor material balances suggested that 1-butene oxidation was essentially complete to CO2 and H2O. 

Figure 4 shows the percent conversion of nitrogen as a function of feed stoichiometry, CH4/N2. The argon feed rate for these runs was fixed at 42 std. cc./sec. The total flow rate of the reactant mixture was typically... 

The carbon monoxide and chlorine gas feeds are mixed in the T-junction of the reactor and then guided through the catalyst bed of the reactor. The catalyst, carbon particles with a diameter of 53-73 pm, is preconditioned by heating the reactor at 150 °C for 2 h under a constant argon flow. A mixture of 2/3 CO and 1/3 chlorine (4.5 seem min-1) is fed into the reactor. The reactor was incrementally heated to 220 °C the pressure at the inlet was -132 kPa and nominally atmospheric at the outlet [39],... 

Fig. 19. The dependence of methanol synthesis rates at 225-250°C, 75 atm total pressure, and gas hourly space velocity 5000 hr 1 upon the ratio of concentrations of C02 and CO. The total hydrogen-to-carbon ratio in the feed gas was 7 3 for all C02/C0 ratios. Experimental data are marked as open symbols and theoretical dependences, described by the kinetic model in text with the values of constants as in Table IX, as full curves. The closed symbol describes an equivalent of conversion rate when carbon dioxide in the mixture C0/C02/H2 = 24/6/70 was replaced by argon (56). [Reprinted with permission from J. CataL, 74,343 (1982). Copyright (1982) Academic Press, New York.)...

The transport properties of the membrane were measured by using a membrane permeation unit as described in our previous papers.32 42 Two gas mixtures were used as the feed gas for the gas permeation tests one consisting of 20% C02, 40% H2, and 40% N2, and the other consisting of 1% CO, 17% C02, 45% H2, and 37% N2 (both on dry basis). The second composition was used to simulate the composition of the synthesis gas from autothermal reforming (ATR) of gasoline with air. Argon was used as the sweep gas for the ease of gas chromatography analysis. Unless otherwise stated, the feed pressure was maintained at about 2.0 atm, while the permeate pressure was set at approximately 1.0 atm. 

Figure 4.7 shows hydrogen flux data for membranes of Group IVB-VB material tested at Eltron Research Inc. using feeds containing various components of a water-gas shift mixture. The membranes were tested with a total pressure in the feed up to 450 psi (31.0 bar) and with argon sweep gas at ambient pressure. In an... 

In line with the proposed approach, which is outlined in Figure 3.4, a non-reactive CFD simulation is performed first using commercial software (ANSYS Fluent in this case), in which the feed stream consists of an inert gas (e.g., argon and nitrogen) with the same flow rate and temperature of the actual reacting mixture (laminar, stationary, and monocomponent model). In the second phase, the flow field is exported from the commercial code by means of a user-defined function (UDF). In the third and final phase, exported data are introduced into a C-F-F code, which solves the transport equations, taking into account both chemical kinetics and reactor fluid dynamics. 

Each fuel assembly consists of 18 fnel pins. A fuel pin is a tube of zirconium/2V2 niobium alloy with an external diameter of 13-6 mm and a minimum thickness of 0-825 mm, filled with pellets of uranium dioxide. The fuel pellets are 11-52 mm in diameter and 15 mm high with cavities in the end faces. The inner space of the fuel pin is filled with an argon/ helium gas mixture. Top and bottom terminal grids hold the fuel pins and are positioned above and below the level of the core. Two fnel assemblies are combined in the element giving an active length of 7 m. The nranium feed enrichment is 2-0%. 

---