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Inhibitor impact on coke formation and aromatics in heavy pyrolysis resins



Karpov A.B., Kondratenko A.D., Kozlov A.M., Zhagfarov F.G. (Gubkin State Oil and Gas University, RF, Moscow)

E-mail: karpov.a@gubkin.ru For the petrochemicals sector, hydrocarbon pyrolysis is commonly viewed critical for light olefins. Coke formation on internal reactor tubes and downstream heat exchangers is a pressing issue. This paper considers coke formation which could be essentially suppressed by water and alcohol solutions of boron and tinny materials. It proposes a better way to identify polycyclic hydrocarbons in pyrolysis resins using highly efficient liquid chromatography tools. Several mechanisms were found to prevent aromatics and coke formation under pyrolysis. Polycyclic aromatics in pyrolysis resins could be cut 1.7 times by addition of tin and boron inhibitor water solutions and 4.8 times when alcohol solutions are used. When tin is combined with boron, active centre suppression efficiency appears similar to sulphur compounds which are in common industry use presently.

References

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2. Chevron Phillips Chemicals Company LP. Available at: http://trastcg.com/036767035/0488721828.htm (accessed 12.11.2015).
3. Zhagfarov F.G., Karpov A.B., Vasilenko V.Yu., Sorokin B.A. Sovershenstvovaniye tekhnologii piroliza putem primeneniya ingibitorov koksoobrazovaniya [Improvement of pyrolysis technology by applying coke formation inhibitors]. NefteGazoKhimiya Ц Oil and Gas Chemistry, 2014, no. 4, pp. 24Ц27.
4. Dwight K. Reid, David R. Forester. Method for retarding corrosion and coke formation and deposition during pyrolytic hydrocarbon processing. Patent US , no. 4756820, 1988.



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