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- W3186999462 abstract "One of the operating challenges in the bitumen fluid coking process is the carbonaceous deposit which forms in cyclones and cyclone exit tubes. While it is known that these deposits originate in the vapour phase, more information is needed regarding their formation mechanisms and structure in order to mitigate this problem. In this laboratory study, deposits were collected from a cyclone fouling unit and compared with industrial samples. They were then characterized using elemental analysis, SEM-EDAX, TGA and DRIFT spectra. The extraction of soluble deposit fractions was examined using solvent extraction methods. Small droplets in the SEM indicated the presence of physical condensation in laboratory cyclone deposition. Industrial deposits did not exhibit this feature. An aging study of fresh laboratory deposits was also carried out to determine the evolution of deposit structure over time. The high H/C atomic ratio of fresh deposits was found to decrease significantly during the first day of aging at 550 degrees C. The thermal properties of the aged laboratory deposits were similar to those of the industrial samples. It was also shown that chemical reactions of coke formation take place during aging. These results indicate that volatile paraffinic species in the laboratory deposits dissipate during the first day of aging. The study offers insight into the composition and structures of laboratory and commercial deposits." @default.
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- W3186999462 date "2004-07-01" @default.
- W3186999462 modified "2023-09-27" @default.
- W3186999462 title "Characterization of carbonaceous deposits from hydrocarbon vapours in fluid coker cyclones" @default.
- W3186999462 hasPublicationYear "2004" @default.
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