| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.902 |
| 발표분야 |
촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 |
Active Phase of Unsupported MoS2 Catalysts for Slurry Phase Hydrocracking of Vacuum Residue |
| 초록 |
Mono-layered MoS2 nanoparticles were successfully synthesized ex situ by ligand stabilization method using Mo(CO)6 as Mo precursor and trioctylphosphine oxide (TOPO) as a coordinating agent, where nucleation and sulfidation steps played an important role in the formation of nano-sized MoS2 slab with different size distribution ranging from of 5.6 nm (MoS2-ES) to 10.5 nm (MoS2-EL). A high sulfidation temperature gave rise to the formation of a four-layer MoS2 stack. In addition, mono-layered MoS2 nanoparticles with a mean diameter from 8.4 nm (MoS2-IS) to 9.5 nm (MoS2-IL) were also obtained. EXAFS analysis confirmed that the MoS2 catalysts obtained by in situ or ex situ methods show the formation of MoS2 phase with abundance of exposed Mo sites. The activity test results of the MoS2 catalysts on the VR HCK suggest that the dispersed MoS2 features abundance of exposed Mo sites that are active for the VR HCK. Moreover, it was demonstrated that the intrinsic activity of the dispersed MoS2 catalysts in the VR HCK is found to correspond the Mo dispersion based on the rim-site model of hexagonal MoS2 slabs. |
| 저자 |
이용걸, 김기덕, 정현록
|
| 소속 |
단국대 |
| 키워드 |
촉매 |
| E-Mail |
|
| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
