| Autor: |
Mobaraki, Mahboobeh, Afshang, Benyamin, Rahimpour, Mohammad Reza, Bahrololoom, Mohammad Ebrahim |
| Zdroj: |
Emergent Materials; 20230101, Issue: Preprints p1-11, 11p |
| Abstrakt: |
The formation of coke on the inner surface of the cracking furnace coils arises from undesirable side reactions during the cracking of hydrocarbons to ethylene. The accumulation of coke not only reduces heat transfer rate, production capacity, and internal diameter of reactor, but also increases pressure drop. To tackle the issue, the inner surface of coils can be coated by different materials. In this study, single- and double-layer coatings of silica (SiO2) and titania (TiO2) are applied over the coil surface of the ethylene cracking furnace, a performance of which is evaluated in terms of inhibitory activity against coke formation during the process. In this regard, the morphology and chemical composition of the applied coatings are studied using EDX and SEM analyses. The characterization results revealed the best inhibition performance of SiO2-coating with the coke reduction of around 68% compared to the uncoated surface. It is also conducted that although TiO2coating cannot exert significant effects over the coke reduction, the double-layer coatings boost the inhibition performance notably; the coke reduction is around 40% and 57% for the SiO2-TiO2and TiO2-SiO2double-layer coatings, respectively. |
| Databáze: |
Supplemental Index |
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