Methanol was oxidized to formic acid in a catalyst chamber at 18°C. What should be rate of removal of heat (in kcal/hr) to maintain the reaction chamber at 18°C with the feed rate of 1.6 kg methanol p

Question

Methanol was oxidized to formic acid in a catalyst chamber at 18°C. What should be rate of removal of heat (in kcal/hr) to maintain the reaction chamber at 18°C with the feed rate of 1.6 kg methanol per hour, along with excess oxygen to the system at 18°C, with a 30 mole per cent yield based on methanol. The enthalpies of formation of H₂O(l), CH₃OH(l) and HCOOH(l) are, respectively, -68, -57 and -100 kcal/mol.

Answer:

1665.00

Solution:

CH₃OH(l) + O₂ → HCOOH(l) + H₂O(l): ΔH = [(-100) + (-68)] - (-57) = -111 kcal/mol. Feed = 1600/32 = 50 mol/hr; at 30% yield, 15 mol/hr reacts. Heat removal rate = 15 × 111 = 1665 kcal/hr. Answer: 1665.

TestHub · Accepted Answer

CH 3 OH(l) + O 2 → HCOOH(l) + H 2 O(l): ΔH = [(-100) + (-68)] - (-57) = -111 kcal/mol. Feed = 1600/32 = 50 mol/hr; at 30% yield, 15 mol/hr reacts. Heat removal rate = 15 × 111 = 1665 kcal/hr. Answer: 1665.

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