An innovative approach to the regeneration of hot gas desulfurization sorbents

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:504702

White, J; Lopez-Ortiz, A; Huang, W N; Groves, F R; Harrison, D P ^[1]

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1. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Chemical Engineering

Three concepts for the direct production of elemental sulfur during the regeneration of high temperature desulfurization sorbents have been identified: (1) partial oxidation in a steam-oxygen atmosphere under oxygen-starved conditions, (2) reaction with SO{sub 2}, and (3) reaction with steam, to produce H{sub 2}S suitable for conversion to elemental sulfur in a Claus process. Thermodynamic analysis indicates that metal oxides having the strongest affinity for H{sub 2}S are less conducive to elemental sulfur production than oxides that are less effective for H{sub 2}S removal. Iron and cerium oxides have an appropriate combination of H{sub 2}S removal capability and the potential for elemental sulfur production during regeneration, and these systems are being studied experimentally. Electrobalance and fixed-bed reactors are being used to study the kinetics of individual reactions and to determine the quantity of elemental sulfur produced. One unique feature of the fixed-bed reactor is a product gas analytical system which permits the concentrations of elemental sulfur, H{sub 2}S, and SO{sub 2} to be determined on a semi-continuous basis.

• OSTI ID: 504702
• Report Number(s): CONF-960954--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORBENTS
CERIUM OXIDES
DESULFURIZATION
FUEL GAS
HOT GAS CLEANUP
IRON OXIDES
PRODUCTION
REGENERATION
SORPTIVE PROPERTIES
SULFUR
THERMODYNAMICS