Calculate the equilibrium composition of the water-gas shift reaction of Exercise 10.25 with the element potential method. Compare the accuracy of the results with those obtained with the equilibrium constant method and with STANJAN, commenting on the difference and on the differences between the methods. Make a chart of the equilibrium composition as a function of temperature similar to the one of Figure 10.5a. Comment on the trends visible in the chart.

Data From Exercise 10.25

The water-gas shift reaction is . Processes based on this reaction have been studied as a means of providing H₂ as an automotive fuel. Assume that 1 mole of CO reacts with one mole of H₂O at1800 K and 1 atm. Determine the equilibrium composition. Will lowering the temperature increase or decrease the yield of H₂? Neglect species other than CO, H₂O, CO₂ , H₂. Values of K = K( - T) for the water-gas shift reaction are

What effect does an increase in CO have on the H_2?yield at 1800 K?

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mole fraction x 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 CO₂2 1000 0₂ 2000 3000 4000 CO Temperature T/K (a) As function of the temperature. P= 1.01325 bar, C/O=1:3.125. 5000