Temperature effects heatup paths

The effect of feed gas temperature on heatup path is determined by inserting new enthalpy values into Eqn. (11.7). With 660 K feed gas (for example), enthalpy Eqn. (11.7) becomes ... 

Fig. 11.5 summarizes the effects of S02 feed gas strength on heatup paths. It shows that each % SO2 oxidized gives a larger temperature increase with ... 

These pressure differences have no effect on heatup paths, Fig. 12.4 - and little effect on equilibrium curves and intercepts. Intercept temperature and % S02 oxidized both increase slightly with increasing pressure. 

Fig. 12.6. Effect of CO2 on intercept temperature and % S02 oxidized. Heatup path slope increases slightly with increasing CO2 in gas - because C02 heat capacity is greater than N2 heat capacity, Appendix G. This decreases intercept temperature and increases % S02 oxidized. C02 calculations are described in Chapter 17.

Fig. 12.5. Effect of feed gas O2 strength on constant SO2 strength heatup paths, equilibrium curves and intercepts. Intercept temperature and % SO oxidized increase slightly with increasing 02-in-feed-gas. Heatup path is barely affected by O2 strength - 3 paths are superimposed on this graph. The effect is small because ...

Table 11.3 summarizes % SO2 oxidized versus gas temperature as calculated by the above method. The points are equivalent to the heatup path in Fig. 11.1. As expected, high gas temperatures are equivalent to extensive SO2+Vi02 — SO3 oxidation and vice versa. The next two sections describe the effects of ... 

Figure 12.4 Effect of pressure on equilibrium curves and heatup path-equilibrium curve intercepts. Equilibrium curves and intercepts are affected by pressure. Heatup paths are not. Intercept temperature and % SO2 oxidized both increase shghtly with increasing pressure. The intercepts have been calculated as described in Appendix J.

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See also in sourсe #XX -- [ ]

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