Vacuum residue upgrading over MoS2 and cobalt promoted MoS2 nanosheets catalysts = 코발트 황화몰리브데넘 나노판상구조 촉매를 이용한 감압잔사유 고부가화

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The efficient upgrading of vacuum residue to the lighter and more valuable products have attracted importance because of indispensable demand for light oils and stringent environmental protection laws. Slurry phase hydroprocessing is one of the efficient cracking techniques. The transition metal sulfides are considered as very good hydroprocessing catalysts. Molybdenum sulfide and cobalt promoted molybdenum sulfide nanosheets were synthesized by hydrothermal method, characterized by XRD, TEM and BET analysis and used as catalysts for slurry phase upgrading of petroleum vacuum residue. Catalysts efficiency was evaluated on the basis of conversion of vacuum residue, desulfurization, denitrogenation, and distillate yield and coke formation. We found that molybdenum sulfide nanosheets has shown very good results in hydrocracking and processing of vacuum residue and promotion of cobalt on molybdenum sulfide nanosheets has improved its processing activity. The higher activity was due to the efficient movement of nanosheets through the asphaltene molecules and promotion of cobalt. The liquid products were analyzed by elemental analysis, NMR and GC-SIMDIS analysis. Hydrocracking and processing was also performed over molybdenum sulfide nanosheets by using water instead of hydrogen gas as it is an expensive and dangerous gas. Several reactions were performed by varying operating conditions such as temperature and amount of water. Molybdenum sulfide nanosheets has shown good yield of liquid product.
Advisors
Woo, Seong-Ihlresearcher우성일
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2012
Identifier
509370/325007  / 020104536
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2012.8, [ vii, 52 p. ]

Keywords

Molybdenum; Cobalt; nanosheets; catalyst; 몰리브데넘; 코발트; 나노판상구조; 촉매를; 황화물; sulfide

URI
http://hdl.handle.net/10203/179989
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=509370&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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