Journal of Catalysis, Volume 299, March 2013, Pages 321–335
Ultradeep hydrodesulfurization of diesel fuels
using highly efficient nanoalumina-supported catalysts: Impact of support,
phosphorus, and/or boron on the structure and catalytic activity
Fereshteh Rashidi a, b, Takehiko Sasaki a, Ali
Morad Rashidi c, Ali Nemati Kharat b, Kheirollah Jafari Jozani d
a Department of Complexity Science and Engineering, Graduate School of Frontier
Sciences, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8561,
Japan
b School of Chemistry, University College of Science, University of Tehran,
14155-645, Tehran, Iran
c Nanotechnology Research Center, Research Institute of Petroleum Industry
(RIPI), Tehran, Iran
d Gas Research Division, Research Institute of Petroleum Industry (RIPI),
Tehran, Iran
Abstract
Authors describe novel
nanocatalysts—CoMoP/nanoAl2O3,
CoMoB/nanoAl2O3, CoMo/nanoAl2O3–B2O3,
CoMoPB/nanoAl2O3, and CoMoP/microAl2O3— which were fabricated by a
wet co-impregnation method on micro- and nanostructured alumina supports.
The effects of
physicochemical and chemical properties of the supports—new mesoporous nano-γ-Al2O3
[high surface area (403.05 m2 g−1), cylindrical pore size (104.59 Å), large pore
volume (1.69 cm3 g−1), surface defects, and acidic surface] and
conventional micro-γ-Al2O3
[surface area (246.20 m2 g−1), pore volume (0.5 cm3 g−1), pore size (70.30 Å), and
neutral surface]—and of phosphorus (P) and
boron (B) addition on the local structure and hydrodesulfurization (HDS)
activity of CoMoS catalytic sites were examined in hydrodesulfurization
reactions of straight-run light gas–oil (SRLGO). Characterization results indicated
that dispersion of Co and Mo to form the CoMoS II phase is improved on the
nanoAl2O3 support.
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