MOL-nitrogen

In the BMA process, methane (natural gas) and ammonia are reacted without air being present (44). The reaction is carried out in tubes that are heated externally to supply the endothermic heat of reaction very similar to a reformer. Yield from ammonia and methane is above 90%. The off-gas from the converter contains more than 20 mol % hydrogen cyanide, about 70 mol % hydrogen, 3 mol % ammonia, 1 mol % methane, and about 1 mol % nitrogen from ammonia decomposition. 

O Gas Analysis (Wet) Mol% Nitrogen Carbon Dioxide Water Vapor Oxygen... 

Since there is no metal with an atomic weight of 14.0 g/mol (nitrogen is not a metal), then the metal Q must be lithium, a IA element with an atomic weight of 6.9 g/mol), and the compound must be Li2C03. 

Finally, divide each of these mole values by the lowest among them, 1.031. You get 4.0 mol carbon, 5.0 mol hydrogen, 1.0 mol oxygen, and 2.0 mol nitrogen, giving you the empirical... 

The synthesis gas is compressed in a two-stage compressor with interstage cooling to 92.7 bar and combined with a recycle stream that is 30,660 kmol/h with a composition that is quite different from that of the synthesis gas. The inert components (nitrogen and methane) are allowed to build up to fairly high levels (24.3 mol% methane, 3.8 mol% nitrogen) so that the losses of reactants in the vent stream are kept small. The vent stream is only 893 kmol/h. 

After C02 removal, the remaining mixture has the composition 91 mol% CH4, 7.1 mol% nitrogen and 1.9 mol% oxygen. The appropriate selector is again purification . Examination of Table 3.8 indicates that molecular sieving may be applied to remove both nitrogen and oxygen. Another possibil-... 

The final mass and energy balance are shown in the stream table (Table 7.2). By checking the mass balances around each unit, you can see that they balance except for a small discrepancy between streams 9 and 10. The hydrogen flow rate is off by 0.05 lb mol/h, compared with a total flow of 1490 lb mol/h. The overall conversion (100 mol nitrogen to 197.5 mol ammonia) is reasonable. The rest of the raw materials are lost. Most of the carbon dioxide goes out in the ammonia so perhaps the purge stream was not necessary. 

Compute the equilibrium conversion of sulfur dioxide to sulfur trioxide over the temperature range of 0 to 1400° C for a reactant mixture consisting of initially pure sulfur dioxide and a stoichiometric amount of air at a total pressure of 1.013 bar. (Air contains 21 mol % oxygen and 79 mol % nitrogen.)... 

Data Air may be considered to be 21 mol % oxygen and 79 mol % nitrogen the heats and Gibbs energies of formation are given in Appendix A.IV, and the heat capacities in Appendix A.II. 

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