Spectroscopic characterization of nickel containing desulfurization sorbents

Journal Article · Sat Apr 01 04:00:00 EST 2000 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie990521z· OSTI ID:20062652

Siriwardane, R V; Gardner, T; Poston, Jr, J A; Fisher, E P

Characterization of nickel-containing desulfurization sorbents was performed by X-ray photoelectron spectroscopy, scanning electron microscopy/energy-dispersive spectroscopy, thermogravimetric analysis, and atomic absorption analysis. Sorbent pellets were tested with simulated coal-derived hot fuel gas containing H{sub 2}S, in a bench-scale fixed-bed reactor. Analysis was performed on both the interior and exterior of the sorbent pellets after both sulfidations and regenerations. In the sulfided sorbents, migration of nickel to the grain surface was observed at the exterior of the sorbent pellet. The nickel migration was less significant at the grain surface of the interior of the pellet. Changes in the oxidation state of the nickel were also observed at the outer surface of the pellet. The sulfur concentration was significantly higher at the outer surface of the pellet, indicating diffusional resistance of the fuel gas to the pellet interior.

• Research Organization: Dept. of Energy, Morgantown, WV (US)
• Sponsoring Organization: US Department of Energy
• OSTI ID: 20062652
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 4 Vol. 39; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORBENTS
ADSORPTION
DESULFURIZATION
FUEL GAS
HOT GAS CLEANUP
HYDROGEN SULFIDES
NICKEL COMPOUNDS