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Thermal cracking. In thermal cracking, high temperatures (typically in the range of 450Â°C to 750Â°C) and pressures (up to about 70 atmospheres) are used to break the large hydrocarbons into smaller ones. Thermal cracking gives mixtures of products containing high proportions of hydrocarbons with double bonds - alkenes.
Decomposition products may include the following materials: carbon dioxide. carbon monoxide. Contains gas under pressure. Extremely flammable gas. In a fire or if heated, a. pressure increase will occur and the container may burst, with the risk of a subsequent. explosion.