Chemistry — Catalytic Cracking
Breaking long alkanes into useful products.
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digraph Cracking {
rankdir=LR;
node [shape=box, style=rounded];
"Long-chain alkane" -> "Heat + catalyst" [label="about 500 C, zeolite"];
"Heat + catalyst" -> "Shorter alkane" [label="e.g. octane"];
"Heat + catalyst" -> "Alkene" [label="e.g. ethene"];
"Alkene" -> "Polymers and ethanol" [label="useful products"];
}