Enthalpy equations in heatup path matrix cells

Enthalpy Equations in Heatup Path Matrix Cells 

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  

Insertion of these equations into Table 11.2 (with 690 K and 820 K in cells F10 and J10) automatically gives the Table 11.2 result, as shown below. The temperatures in cells FIO and JIO can then be changed at will - and new heatup path points automatically calculated. Example results are shown after Table I.l. Matrix solving is described in Appendix H. 

1 Equation description numerical term kg-mole SO2 in l -mole 02 in l -mole N2 in kg-mole SOj out kg-mole SO2 out kg-mole O2 out kg-mole N2 out 

Heatup Path-Equilibrium Curve Intercept Calculations 

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Appendix I Enthalpy equations in heatup path matrix cells... 

Table 14.3. Heatup path points for Fig. 14.2 s 2nd catalyst bed. The points are shown graphically in Fig. 14.3. They have been calculated using matrix Table 14.2 with enthalpy equations in cells H15-K15, Appendix K. An increase in gas temperature from 700 K to 760 K in the 2nd catalyst bed is seen to be equivalent to an increase in % SO oxidized from 69.2% to 89.7%.

Table 17.3. Is1 catalyst bed heatup path matrix with S03 and C02 in feed gas". Cells D15 to H15 contain -H°9QK values. Cells 115 to M15 contain H°2QK values. All are calculated with Appendix G s enthalpy equations. 820 K part way down the catalyst bed is shown to be equivalent to oxidation of 46.7% of the feed gas s S02. 

A heatup path matrix is entered as described in Tables 11.2 and 1.1. Cells D28 to J28 contain enthalpy-as-a-function-of-temperature equations, Table 1.1. Cells C22 to C24 contain input kg-mole S02,02 and N2, Section 11.13. 

Table K.l shows a 2nd catalyst bed heatup path matrix with enthalpy-as-a-fiinction-of-temperature equations in cells D15 to K15. The only difference between this matrix and the Table 14.2 matrix is that Eqn. 14.9 in row 15 has been changed to ...

Table N.l. 3rd catalyst bed heatup path matrix with enthalpy equations in cells D15-K15. The numerical quantities in cells C8-C11 are Table M.2 s 2nd catalyst bed intercept quantities. 

The Appendix K heatup path matrix is entered into cells C21 to K28. Cells D28 to K28 contain enthalpy-as-a-fimction-of-temperature equations. Appendix K (- in cells D28 to G28). Cells C21 to C24 contain Fig. 14.2 s 2" catalyst bed input kg-mole SO3, SO2,02 and N2. 

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