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Application of different pore diameter SBA-15 supports for heavy gas oil hydrotreatment using FeW catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
41237 45882 2011 10 PDF Available
Title
Application of different pore diameter SBA-15 supports for heavy gas oil hydrotreatment using FeW catalyst
Abstract

This work focuses on utilizing mesoporous SBA-15 materials of different pore diameters as potential hydrotreating catalyst supports for heavy gas oil (HGO). Hexane was used as swelling agent for the preparation of variable pore diameter SBA-15 materials. Four kinds of SBA-15 supported FeW catalysts with different pore diameters in the range of 5–20 nm were prepared and designated as Cats-A to D. The aqueous co-impregnation technique was employed for preparation of the catalysts. The supports were characterized by several techniques including X-ray powder diffraction (XRD) and N2 adsorption–desorption isotherms. The SBA-15 supported FeW catalysts were characterized by ICP-MS, BET surface area analysis, powder XRD, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and CO chemisorption. Results from XRD profiles, TEM images, and N2 adsorption–desorption isotherms confirmed the presence of highly ordered two-dimensional hexagonal structure with cylindrical arrays of pores. The structural integrity of the samples was preserved even after loading of 2 wt.% Fe and 15 wt.% W. Hydrotreating experiments were conducted using bitumen derived heavy gas oil under industrial conditions of temperature, pressure, LHSV, and gas to oil ratio of 375–400 °C, 8.8 MPa, 1 h−1, and 600 mL/mL, respectively. The SBA-15 supported catalyst with pore diameter of 10 nm (Cat-B) was the best among the supports studied for FeW catalysts, probably due to sufficient mass transfer of reactant liquids and gases through the catalyst's pores while still maintaining a high surface area necessary for metal dispersion.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (115 K)Download as PowerPoint slideHighlights► Pore diameter plays a vital role in the hydrotreating of heavier petroleum fractions. ► Catalyst with pore diameter ∼10 nm showed the highest hydrotreating activity. ► DRIFTS studies show that the catalyst with pore diameter of 10 nm has the highest number of coordinatively unsaturated sites (CUS).

Keywords
SBA-15; Pore diameter; FeW catalyst; Heavy gas oil; HDN; HDS; Hydrotreating
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Application of different pore diameter SBA-15 supports for heavy gas oil hydrotreatment using FeW catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 402, Issues 1–2, 31 July 2011, Pages 31–40
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us