Thermal cracking of vacuum distillates |
| |
| Affiliation: | 1. Department of Thermal Engineering and Industrial Facilities, Opole University of Technology, 5 Mikołajczyka St, 45-271 Opole, Poland;2. RENERGI Sp. z.o.o. 17B/3 Koziorożca St, 80-299 Gdańsk, Poland;3. Energetyka Cieplna Opolszczyzny ECO S.A., 15 Harcerska St, 45-118 Opole, Poland;1. Energy Planning Program, Graduate School of Engineering, Universidade Federal do Rio de Janeiro, Centro de Tecnologia, Bloco C, Sala 211, Cidade Universitária, Ilha do Fundão, 21941-972 Rio de Janeiro, RJ, Brazil;2. IFP School, 232 Avenue Napoléon Bonaparte, 92852 Rueil-Malmaison, France;1. Renewable Energies and Environmental Department, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran;2. School of Chemical Engineering, University College of Engineering, University of Tehran, P.O. Box 11365-4563, Tehran, Iran;1. School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea;2. Department of Chemical & Petroleum Engineering, Curtin University of Technology, CDT 250, 98009 Miri, Sarawak, Malaysia;3. School of Environment, Science & Engineering, Southern Cross University, Lismore 157, Australia |
| |
| Abstract: | The hydrotreatment of vacuum distillates under suitable operating conditions, mainly the conversion and partial pressure of hydrogen, can be used to feed a steam cracker. This hydrotreatment substantially increases the production of the products sought while preventing the formation of resins and asphaltenes.The thermal decomposition of vacuum gas-oil (VGO) and hydrotreated vacuum distillates (HVD) in the presence of steam (steam cracking) was studied in a plug flow reactor around 1053 K. The tubular reactor was a wound Incology steel tube (4 mm I.D.) heated by high-frequency induction. The total pressure in the reactor was slightly above atmospheric. By analysis (by gas and liquid chromatography, mass spectrometry, distillation and simulated distillation and asphaltene extraction) of the feedstocks and the steam cracking products, we observed that hydrotreatment of VGO transforms the initial polyaromatics into less condensed and more hydrogenated products that do not produce resins and asphaltenes during steam cracking. The cracking gasoline and the light pyrolysis products, essentially made up of α-olefins, are primary products.Considering the extreme complexity of middle and heavy steam cracking fractions, the grouping of products by families (polyaromatics, resins, asphaltenes) enabled a kinetic-semiquantitative analysis of the data to be made, and from this secondary nature of the asphaltenes could be defined together with the primary nature of the polyaromatics and resin. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
