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Interactions | Reactions | Processes
Classified as: Cracking, Thermal
Thermal cracking involves breaking longer alkanes into a mixture of shorter alkanes (including branched alkanes) and the olefins: ethene and propene.
The mechanism involves radical cleavage and then radical beta-eliminateion of ethene or propene, the reverse of radical polymerisation.![](http://www.chemthes.com/mech/222.gif)
6 |
CH4 |
+ |
O2 |
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2 |
HC≡CH |
+ |
2 |
CO |
+ |
10 |
H2 |
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CH3CH3 |
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H2C=CH2 |
+ |
H2 |
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+ |
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+ |
H2C=CH2 |
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+ |
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+ |
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+ |
CH3–CH=CH2 |
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Naphtha |
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Gasoline |
+ |
H2C=CH2 |
+ |
CH3–CH=CH2 |
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Gas Oil |
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Gasoline |
+ |
H2C=CH2 |
+ |
CH3–CH=CH2 |
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Naphtha |
+ |
Gas Oil |
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+ |
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+ |
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+ |
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Naphtha |
+ |
Gas Oil |
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+ |
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+ |
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Naphtha |
+ |
Gas Oil |
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+ |
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Gas Oil |
+ |
Fuel oil |
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CH4 |
+ |
Natural Gas |
+ |
Naphtha |
+ |
Crude Oil |
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HC≡CH |
+ |
H2C=CH2 |
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+ |
3 |
H2C=CH2 |
+ |
2 |
CH3–CH=CH2 |
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+ |
H2C=CH2 |
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+ |
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[CH3CH2]+ |
+ |
[CH3]+ |
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© Mark R. Leach 1999 –
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