Heatup Path Calculation

Our heatup path calculations assume that there is no transfer of heat between gas and reactor walls or between gas and catalyst. The result is, therefore, an adiabatic heatup path. 

Table 21.1. Bottom half of Table O.l s 3rd catalyst bed heatup path-equilibrium curve intercept worksheet. Input and output gas enthalpies are shown in rows 43 and 44. Note that they are the same. This is because our heatup path calculations assume no convective, conductive or radiative heat loss during catalytic SO2+V2O2 —> SO3 oxidation, Section 11.9. 1st and 2nd catalyst bed enthalpies are calculated similarly - using Tables J.2 and M.2. 

Heatup path calculations are simplified by putting enthalpy-as-a-function-of-temperature equations in cells D8-J8 of matrix Table 11.2. The equations are listed in Appendix G. They change Eqn. (11.7) to ... 

Steps 3 and 4 automatically calculate the equilibrium curve temperature (cell A14) equivalent to the % S02 oxidized value in cell FI 1. The cell A14 temperature is automatically copied into cell J30. This links the equilibrium curve and heatup path calculations. 

Appendix G Enthalpy equations for heatup path calculations... 

Steps 4 and 5 automatically calculate the cell A14 equilibrium curve temperature that is equivalent to cell Fll s guesstimated % SO2 oxidized. The ceU A14 temperature is then automatically copied into ceU J30, as shown. This links the second bed equUihrium curve and heatup path calculations. 

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