CATEGORY: HYDROTREATING
23rd North American Catalysis Society Meeting,
June 2-7, 2013, Louisville, Kentucky
Combined effect of EDTA and heteroatoms (Ti, Zr
and Al) on catalytic activity of SBA-15 supported NiMo catalyst for
hydrotreating of HGO.
Sandeep Badoga
(1), Ajay K. Dalai (1)* and John Adjaye (2)
ajay.dalai@usask.ca
1 Department of Chemical and Biological Engineering, University of
Saskatchewan, Saskatoon, SK, S7N 5A9, Canada
2 Syncrude Edmonton Research Centre, Edmonton, AB, T6N 1H4, Canada
Introduction
The objective of the present work is to study
the combined effect of chelating agent and incorporation of heteroatoms (Ti, Zr
and Al) in SBA-15 framework, on the hydrotreating activity of NiMo catalyst. In
this work, we have synthesized NiMo/M-SBA-15 (M= Ti, Al and Zr) catalysts in presence
of EDTA as chelating ligand. XANES technique was employed to understand the
interactions between support material, active metal and EDTA and to relate
these with structural changes at atomic level. All catalysts were screened with
Athabasaca bitumen derived heavy gas oil, in fixed bed reactors at industrial
conditions. The hydrotreated product was analyzed for N-S conversion and the
hydrodearomatization (HDA) studies were done using SFC petro-analyser, 13C NMR
and CHNS analyzer.
Significance
This study shows that incorporation of heteroatoms (Ti, Al and Zr) in SBA-15
framework increases the acidic strength and EDTA favors the formation of
octahedral MoO3 crystallites (along with delaying the Ni sulfidation
temperature). This helps in better dispersion and formation of type-II NiMoS
active phase which results in enhanced activity. NiMo/Ti-SBA-15 (EDTA) catalyst
shows a potential of superior hydrotreating catalyst.
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