Seek help: Reasons for the decrease in propylene content after catalytic treatment of liquid hydrocarbon composition and its storage in tanks
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The propylene content in the liquid hydrocarbons from the catalytic cracking unit remains relatively stable. However, after the liquid hydrocarbons enter the large tank (as a single catalytic component), when samples are taken from the sampling ports, the propylene content varies considerably; sometimes the value for samples taken from the same tank is 5-6 percentage points lower. I’m not sure what the reason is, and I hope everyone can help explain it
The samples taken from the aggregated, stratified sampling points are not representative
Olefins in liquid hydrocarbons are oxidatively polymerized in large tanks to undergo reactions.
Check whether the vapor phase at the top of the liquefied gas tank is escaping, causing propylene loss.