Spectroscopic Characterization of Molybdenum-Containing Zinc Titanate Desulfurization Sorbents

Spectroscopic Characterization of Molybdenum-Containing Zinc Titanate Desulfurization Sorbents

Molybdenum-containing zinc titanate has been identified as a potential regenerable desulfurization sorbent, removing H[sub 2]S from coal-derived fuel gas up to temperatures of 1,035 K. Sorbents were tested in a laboratory scale fixed bed reactor using simulated coal-derived fuel gas and then removed...

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Bibliographic Details
Published in:Industrial & engineering chemistry research Vol. 33; no. 11; pp. 2810 - 2818
Main Authors: Siriwardane, Ranjani V, Poston, James A, Evans, Grover
Format: Journal Article
Language:English
Published: United States American Chemical Society 01-11-1994
Subjects:
01 COAL, LIGNITE, AND PEAT
ADSORBENTS
ADSORPTION
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
DATA
DESULFURIZATION
EXPERIMENTAL DATA
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
REGENERATION
SORPTION
SORPTIVE PROPERTIES
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS 010402 > Coal, Lignite, & Peat > Purification & Upgrading
ZINC COMPOUNDS
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Summary:Molybdenum-containing zinc titanate has been identified as a potential regenerable desulfurization sorbent, removing H[sub 2]S from coal-derived fuel gas up to temperatures of 1,035 K. Sorbents were tested in a laboratory scale fixed bed reactor using simulated coal-derived fuel gas and then removed for analysis. The analyses consisted of X-ray photoelectron spectroscopy, scanning electron microscopy/energy-dispersive X-ray spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, and X-ray diffraction. In the sulfided sorbent, migration of zinc to the surface and sulfur in the sulfide form were observed. In the regenerated sorbent, residual sulfur in the sulfate form was observed. In the sulfided and regenerated sorbent after multicycle testing, a small decrease in the Zn/Ti ratio was detected, indicating some zinc migration. The chemical structure of the sulfided sorbent was different from that of the original sample, as observed by Fourier transform infrared spectroscopy.
Bibliography:ark:/67375/TPS-208WNGSJ-3
istex:25DCD7FDC8FDD67E7690D8FBB2E328CBFA69E07E
None
ISSN:0888-5885
1520-5045
DOI:10.1021/ie00035a034