Solution: About 75 percent of hydrogen for industrial use is
Chapter 14, Problem 14.101(choose chapter or problem)
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 800C to give hydrogen and carbon monoxide: CH4(g) 1 H2O(g) CO(g) 1 3H2(g) H 5 260 kJ/mol The secondary stage is carried out at about 1000C, in the presence of air, to convert the remaining methane to hydrogen: CH4(g) 1 1 2O2(g) CO(g) 1 2H2(g) H 5 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 800C. (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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