Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Yong-Kul Lee"'
Autor:
Yoon-Hyun Hwang, Yong-Kul Lee
Publikováno v:
Journal of Catalysis. 403:131-140
The catalytic activities of the dispersed NixW(1−x)S2 catalysts were investigated for hydrocracking (HCK) of vacuum residue (VR) at 693 K, 9.5 MPa H2 with the same amount of catalyst loading of 0.113 mmol as a metal basis. The catalysts were prepar
Publikováno v:
Journal of Catalysis. 390:117-125
Dispersed MoxW(1−x)S2 catalysts were obtained in situ in the hydrocracking (HCK) of vacuum residue (VR) at 693 K at 9.5 MPa H2 with the same metal loading of 0.113 mmol with varying Mo:W ratios. The intrinsic activities of the catalysts were compar
Autor:
Yong-Kul Lee, Ki-Duk Kim
Publikováno v:
Journal of Catalysis. 380:278-288
Unsupported bimetallic sulfide catalysts were obtained in situ using Mo(CO)6 and Co octoate as precursors to investigate the promotional effect of Co on the MoS2 catalyst in the hydrocracking (HCK) of vacuum residue (VR). Transmission electron micros
Autor:
Jaeuk Shin, Youngseok Oh, Chanwoo Kim, Haeseong Noh, Yong-Su Kim, Jung Kyoo Lee, Yong-Kul Lee
Publikováno v:
Applied Catalysis A: General. 577:86-98
Comprehensive series tests on hydrotreating (HDT) and hydrocracking (HDC) of fluid catalytic cracking (FCC) light cycle oil (LCO) into high-value light aromatics rich in benzene, toluene, and xylenes (BTX) were conducted in a fixed-bed down-flow reac
Autor:
Hyun-Rok Jeong, Yong-Kul Lee
Publikováno v:
Applied Catalysis A: General. 572:90-96
Oil-dispersed WS2 catalysts were prepared in situ using an oil-soluble W precursor of W(CO)6 in the hydrocracking (HCK) of vacuum residue (VR). Smaller size of WS2 catalyst (WS2-DMDS) was also obtained by the addition of dimethyl disulfide (DMDS) wit
Autor:
Ki-Duk Kim, Yong-Kul Lee
Publikováno v:
Journal of Catalysis. 369:111-121
Different morphologies of oil-dispersed MoS2 catalysts were obtained by a ligand stabilization method using Mo(CO)6 as a Mo precursor and trioctylphosphine oxide (TOPO) as a coordinating agent to identify the active site of MoS2 in the hydrocracking
Autor:
S. Ted Oyama, Yong-Kul Lee
Publikováno v:
Applied Catalysis A: General. 548:103-113
Catalysts consisting of Ni 2 P placed on low and high surface area siliceous supports, i.e. SiO 2 -L, SiO 2 -H, and Si-MCM-41, were synthesized by TPR (temperature-programmed reduction), and the effect of the sulfur and nitrogen content of the feed o
Autor:
Yong-Kul Lee
Publikováno v:
Catalysts, Vol 11, Iss 454, p 454 (2021)
Catalysis plays a fundamental role in the establishment of sustainable chemical technologies that are efficient in terms of energy and atoms [...]
Autor:
Nicholas Kaylor, Jiahan Xie, Abhaya K. Datye, Yong-Kul Lee, Hien N. Pham, Yong-Su Kim, Robert J. Davis
Publikováno v:
Journal of Catalysis. 344:202-212
Silica-supported Pd and PdSn catalysts were prepared by ion exchange or incipient wetness impregnation and characterized with H 2 chemisorption, X-ray diffraction, in situ Sn K-edge X-ray absorption near edge structure (XANES), and scanning transmiss
Autor:
Yong-Kul Lee, Ki-Duk Kim
Publikováno v:
Applied Catalysis A: General. 607:117837
Effects of carbon black (CB) additives with dispersed MoS2 catalysts (d-MoS2) on the slurry phase hydrocracking (HCK) of vacuum residue (VR) were studied in an autoclave batch reactor at 693 K and 9.5 MPa H2. For comparison, commercial NiMo catalysts