![]() These processes begin with the reaction of water and natural gas (mainly methane). As an example, the chemical reaction between methane and oxygen:CH4+ 2 O2→ CO2+ 2 H2OIt is produced by thermal decomposition of limestone, CaCO3 by heating at about 850 ☌ (1,560 ☏), in the manufacture of (, CaO), a compound that has many industrial uses:CaCO3→ CaO + CO2is reduced from its oxides with in a, producing and carbon dioxide:Carbon dioxide is a byproduct of the industrial production of hydrogen by and the in. Industrially, carbon dioxide is predominantly an unrecovered waste product, produced by several methods which may be practiced at various scales.The of all, such as, petroleum distillates (, ), coal, wood and generic organic matter produces carbon dioxide and, except in the case of pure carbon, water. In this state it is starting (as of 2018) to be used for.Isolation and production Carbon dioxide can be obtained by from air, but the method is inefficient. Unlike silica and germania glasses, however, carbonia glass is not stable at normal pressures and reverts to gas when pressure is released.At temperatures and pressures above the critical point, carbon dioxide behaves as a known as. This discovery confirmed the theory that carbon dioxide could exist in a glass state similar to other members of its elemental family, like.
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