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Concentrate sulphuric acid can be used to breakdown anhydrous oxalic acid to produce carbon monoxide (and carbon dioxide). Again the sulphuric acid remains chemically unchanged but is diluted by the water produced in the reaction. Less heat is generated in the reaction and there is less likelihood of contamination with vapour from the sulphuric acid. One mole of oxalic acid (~90gm) produces equal molar amounts of carbon dioxide and carbon dioxide.
The chemical equation is: HO2CCO2H aH2 Carbon (charcoal)
0 + CO2 + CO
The incomplete oxidation of carbon can produce copious amounts of carbon monoxide. As the oxygen available to a charcoal fire decreases the production of carbon dioxide decreases and carbon monoxide increases.
The chemical equation is: 2C + O2 a 2CO
Zinc and Calcium Carbonate Powdered zinc can be mixed with calcium carbonate and heated to produce carbon monoxide, along with calcium and zinc oxide. Heat is needed for the process and this offers the opportunity of controlling the process (using an electrical heater).
The chemical equation is: Zn + CaCO3 → ZnO + CaO + CO Vehicle Exhaust Gas as a Source of Carbon Monoxide
Internal combustion engines produce a small percentage of carbon monoxide in the exhaust gas. If this gas is inhaled, death will result. Piping the gas into the car, or running the car in a closed shed are common approaches. In all cases, though, the carbon monoxide will be mixed with a large amount of other foul-smelling exhaust products. One of the benefits of using this gas, peacefulness, is lost.