| 초록 |
In hydrotreating process of extra-heavy oil, coke induces deactivation of catalysts and blocks pores of supports so it decreases catalytic activity. The provision of protons by hydrogenation process could suppress formation of coke. Levy and Boudart reported tungsten carbide, composed of tungsten and carbon atoms, could provide similar catalytic activity with platinum. But unlike platinum, tungsten carbide has sulfur-resistance when it is exposed to sulfur at high temperature. In recent study, small cluster of tungsten carbide has outstanding performance in hydrogen dissociative adsorption even more than platinum. In this study, nano-sized tungsten carbide catalyst was synthesized via sol-gel method and analysed via XRD and TEM. Also, nano-sized tungsten carbide catalysts were applied in vacuum residue reaction. |
