The principle of reducing carbon dioxide by charcoal

The principle is that carbon reacts with carbon dioxide at high temperature to generate carbon monoxide, and the equation is as follows: C+CO=2CO (high temperature).

The reaction conditions are high temperature and carbon is used as reducing agent to reduce carbon dioxide. Carbon reduces carbon dioxide and carbon dioxide oxidizes carbon. Carbon is a reducing agent, which is oxidized and undergoes oxidation reaction. Carbon dioxide is an oxidant, which is reduced and undergoes a reduction reaction. Simple carbon generates oxygen of carbon dioxide at high temperature, which makes carbon dioxide undergo a reduction reaction, and carbon dioxide can supply oxygen to make carbon undergo an oxidation reaction.

Specific introduction:

Charcoal (C) reacts with carbon dioxide (CO2) at high temperature: black solid gradually disappears, producing colorless and odorless gas. Charcoal and carbon dioxide will not react under normal circumstances, but charcoal is reducible and carbon dioxide is oxidizable. Under certain conditions, redox reaction can still occur. C+CO2= (high temperature) 2CO (gas), which is also a special combination reaction and endothermic reaction.

Carbon dioxide is a kind of carbon-oxygen compound, which is a common compound in the air. Under normal pressure, it is colorless, odorless, non-combustion-supporting and non-combustible. Slightly soluble in water to form carbonic acid, which is a weak acid. It has the commonness of acidic oxides, in which the valence of carbon element is +4, which is the highest valence state of carbon element, so carbon dioxide is oxidized rather than reduced, but its oxidation is not strong.