Formaldehyde is produced by catalytic oxidation of methanol by the following reaction: CH3OH + 1/2 O2 CH2O + H2O. Unfortunately, formaldehyde also reacts with oxygen by the following reaction: CH2O + 1/2O2 CO + H2O. Assume that methanol and twice the stoichiometric amount of air (assume 79mol% N2, 21mol% O2) needed for complete conversion of the methanol to the desired products (formaldehyde and water) are fed to the reactor. Assume there is 90% conversion of methanol and there is 75% yield of formaldehyde based on the theoretical production of formaldehyde by the first (desired) reaction. Determine the composition of the product gas leaving the reactor.

Question

Formaldehyde is produced by catalytic oxidation of methanol by the following reaction: CH3OH + 1/2 O2 CH2O + H2O. Unfortunately, formaldehyde also reacts with oxygen by the following reaction: CH2O + 1/2O2 CO + H2O. Assume that methanol and twice the stoichiometric amount of air (assume 79mol% N2, 21mol% O2) needed for complete conversion of the methanol to the desired products (formaldehyde and water) are fed to the reactor. Assume there is 90% conversion of methanol and there is 75% yield of formaldehyde based on the theoretical production of formaldehyde by the first (desired) reaction. Determine the composition of the product gas leaving the reactor.

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