| 초록 |
The world energy demand is continuously increasing. Many efforts has been made to meet the energy demand; study on alternative energy resources as well as active research on unconventional oils, such as oil sands, bitumen, and petroleum heavy oils. Among many unconventional oils, we primarly researched on heavy oil upgrading specifically on vacuum residue (VR) and de-asphalted oil (DAO) upgrading by catalytic hydrocracking. For the process, we have examined several bimetal catalysts, and a Ni-Mo/goethite catalyst was screened and optimized as the best performing and cost-competitive heterogeneous catalyst. Since the heavy nature of VR and DAO, we have observed rapid catalystic activity drops-down, and thus a typical hydrocracking reactor, a fixed-bed reactor, cannot be used for such heavy oil upgrading. Therefore, we have engineered a continus catalyst exchanging reactor. Hydrocracking by using the catalyst and reactor proved highly efficient on heavy oil upgrading of VR and DAO. |
