How Formaldehyde Is Formed?

Formaldehyde is formed by the dehydrogenation of methanol. The heat required for the endothermic reaction is obtained by burning hydrogen contained in the off-gas produced from the dehydrogenation reaction. The other route involves the oxidation of methanol over a catalyst of molybdenum and iron oxide.

How is formaldehyde made?

Formaldehyde is produced industrially by the catalytic oxidation of methanol. ... 250–400 °C in presence of iron oxide in combination with molybdenum and/or vanadium to produce formaldehyde according to the chemical equation: 2 CH₃OH + O₂ → 2 CH₂O + 2 H₂O.

Where does formaldehyde come from?

Formaldehyde is also a byproduct of combustion. When burning natural gas, kerosene, gasoline, wood, or tobacco, formaldehyde is produced. Automobile exhaust is a common source of formaldehyde in our environment. Tobacco smoking in the home is another source of the chemical in the indoor environment.