SUBJECTS Log In Science Chemistry question & answer Mat Hender Asked 1yr ago. About 75 percent of hydrogen for industrial use is produced by the steam-reforming process. This process is carried out in two stages called primary and secondary reforming. In the primary stage, a mixture of steam and methane at about 30 atm is heated over a nickel catalyst at 800 degree C to give hydrogen and carbon monoxide: CH4 (g) + H2O (g) <=> CO (g) + 3 H2 (g) ; ΔH = 206 kJ/mol The secondary stage is carried out at about 1000 degree C, in the presence of air, to convert the remaining methane to hydrogen: CH4 (g) + (1/2) O2 (g) <=> CO (g) + 2 H2 (g) ; ΔH = 35.7 kJ/mol (a) What conditions of temperature and pressure would favor the formation of products in both the primary and secondary stage? (b) The equilibrium constant Kc for the primary stage is 18 at 800 degree C. (i) Calculate Kp for the reaction. (ii) If the partial pressures of methane and steam were both 15 atm at the start, what are the pressures of all the gases at equilibrium?

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Science Chemistry question & answer

Mat Hender

Asked 1yr ago.

About 75 percent of hydrogen for industrial use is produced by the steam-reforming process. This process is carried out in two stages called primary and secondary reforming. In the primary stage, a mixture of steam and methane at about 30 atm is heated over a nickel catalyst at 800 degree C to give hydrogen and carbon monoxide:

CH4 (g) + H2O (g) <=> CO (g) + 3 H2 (g) ; ΔH = 206 kJ/mol

The secondary stage is carried out at about 1000 degree C, in the presence of air, to convert the remaining methane to hydrogen:
CH4 (g) + (1/2) O2 (g) <=> CO (g) + 2 H2 (g) ; ΔH = 35.7 kJ/mol

(a) What conditions of temperature and pressure would favor the formation of products in both the primary and secondary stage?
(b) The equilibrium constant Kc for the primary stage is 18 at 800 degree C.
(i) Calculate Kp for the reaction.
(ii) If the partial pressures of methane and steam were both 15 atm at the start, what are the pressures of all the gases at equilibrium?

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