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nature : also known as pyrolysis or pyrolysis. Hydrocarbons in the high temperature (700 ° C above) molecular strand breaks into small molecular weight of unsaturated hydrocarbon process. The current main naphtha, kerosene, diesel oil as raw materials to the development of heavy oil cracking process, accompanied by condensation, Central and dehydrogenation reaction. Because of the reaction is very complex, usually divided into two stages reaction of view. The first phase, the raw materials into end products for ethylene, propylene, as a response to such reactions. In the second stage, a reaction to the formation of ethylene, propylene continued reaction into alkyne, the two olefins, aromatics, cycloparaffins, and even into hydrogen and coke, the kind of reaction known as secondary reaction. So pyrolysis products are often multiple components of the mixture. Cracking affect the basic factors of temperature and the first reaction is the duration, there is the type of hydrocarbon raw materials. Chemical production using pyrolysis method, the cracking furnace (or tube furnace heat storage heaters), petroleum hydrocarbons into smaller molecules of olefins, alkyne, and aromatic hydrocarbons, such as ethylene, propylene, butadiene, acetylene, benzene and toluene.
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