التفاصيل البيبلوغرافية
| العنوان: |
Alumina-based Coating for Coke Reduction in Steam Crackers |
| المؤلفون: |
Stamatis A. Sarris, Steffen H. Symoens, Natalia Olahova, Marie-Françoise Reyniers, Guy B. Marin, Kevin M. Van Geem |
| المصدر: |
Materials; Volume 13; Issue 9; Pages: 2025 |
| بيانات النشر: |
Multidisciplinary Digital Publishing Institute |
| سنة النشر: |
2020 |
| المجموعة: |
MDPI Open Access Publishing |
| مصطلحات موضوعية: |
CoatAlloy™, passivating coating, steam cracking, thermal cracking, ethane, coke formation, Ni-Cr alloy, aging, jet stirred reactor |
| الوصف: |
Alumina-based coatings have been claimed as being an advantageous modification in industrial ethylene furnaces. In this work, on-line experimentally measured coking rates of a commercial coating (CoatAlloy™) have pointed out its superiority compared to an uncoated reference material in an electrobalance set-up. Additionally, the effects of presulfiding with 500 ppmw DMDS per H2O, continuous addition of 41 ppmw S per HC of DMDS, and a combination thereof were evaluated during ethane steam cracking under industrially relevant conditions (Tgasphase = 1173 K, Ptot = 0.1 MPa, XC2H6 = 70%, dilution δ = 0.33 kgH2O/kgHC). The examined samples were further evaluated using online thermogravimetry, scanning electron microscopy and energy diffractive X-ray for surface and cross-section analysis together with X-ray photoelectron spectroscopy and wavelength-dispersive X-ray spectroscopy for surface analysis. The passivating coating illustrated a better performance than the reference Ni-Cr Fe-base alloy after application of an improved pretreatment, followed by piddling changes on the product distribution. Presulfiding of the coating affected negatively the observed coking rates in comparison with the reference alloy, so alternative presulfiding and sulfur addition strategies are recommended when using this barrier coating. |
| نوع الوثيقة: |
text |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| Relation: |
Corrosion; https://dx.doi.org/10.3390/ma13092025 |
| DOI: |
10.3390/ma13092025 |
| الاتاحة: |
https://doi.org/10.3390/ma13092025 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: |
edsbas.E2C29E9 |
| قاعدة البيانات: |
BASE |