For the following reactions, the standard free energy change is given at 1773 K as follows: 23 Cr2O2(s) = 43 Cr(s) + O2(g) ΔG° = 447800 J 2H2(g) + O2(g) = 2H2O(g) ΔG° = - 297000 J If chromium oxide powder has to be reduced by hydrogen in a fludised bed, the minimum PH_2PH_0 ratio that has to be maintained at the exit of the reactor is

This question belongs to Metallurgical Engineering Metallurgical Thermodynamics And Kinetics

Metallurgical Thermodynamics and Kinetics

For the following reactions, the standard free energy change is given at 1773 K as follows:
$$\frac{2}{3}$$ Cr₂O₂(s) = $$\frac{4}{3}$$ Cr(s) + O₂(g)
ΔG° = 447800 J
2H₂(g) + O₂(g) = 2H₂O(g)
ΔG° = - 297000 J
If chromium oxide powder has to be reduced by hydrogen in a fludised bed, the minimum $$\frac{{P{H_2}}}{{P{H_0}}}$$ ratio that has to be maintained at the exit of the reactor is

A) 8.5 B) 10.6 C) 100.2 D) 166.5

Answer & Solution

Correct Answer: Option D

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