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Title: Removal and Transformation of Sulfur Species During Regeneration of Poisoned Nickel Biomass Conditioning Catalysts

Abstract

Sulfur K-edge XANES was used to monitor sulfur species transforming from sulfides to sulfates during steam + air regeneration on a Ni/Mg/K/Al{sub 2}O{sub 3} catalyst used to condition biomass-derived syngas. The catalyst was tested for multiple reaction/regeneration cycles. Post-reaction samples showed the presence of sulfides on the H{sub 2}S-poisoned nickel catalyst. Although some gaseous sulfur species were observed to leave the catalyst bed during regeneration, sulfur remained on the catalyst and a transformation from sulfides to sulfates was observed. The subsequent H{sub 2} reduction led to a partial reduction of sulfates back to sulfides. A proposed reaction sequence is presented and recommended regeneration strategies are discussed.

Authors:
; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
OSTI Identifier:
1042501
Report Number(s):
NREL/AB-5100-54805
TRN: US201212%%789
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 243rd ACS National Meeting, 25-29 March 2012, San Diego, California; Related Information: Abstract No. PETR-117
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; AIR; BIOMASS; CATALYSTS; MONITORS; NICKEL; REGENERATION; REMOVAL; STEAM; SULFATES; SULFIDES; SULFUR; TRANSFORMATIONS; sulfure species; catalyst; biomass-derived syngas

Citation Formats

Yung, Matthew M., Cheah, Singoong, Kuhn, John N., and Magrini-Bair, Kimberly A. Removal and Transformation of Sulfur Species During Regeneration of Poisoned Nickel Biomass Conditioning Catalysts. United States: N. p., 2012. Web.
Yung, Matthew M., Cheah, Singoong, Kuhn, John N., & Magrini-Bair, Kimberly A. Removal and Transformation of Sulfur Species During Regeneration of Poisoned Nickel Biomass Conditioning Catalysts. United States.
Yung, Matthew M., Cheah, Singoong, Kuhn, John N., and Magrini-Bair, Kimberly A. Sun . "Removal and Transformation of Sulfur Species During Regeneration of Poisoned Nickel Biomass Conditioning Catalysts". United States.
@article{osti_1042501,
title = {Removal and Transformation of Sulfur Species During Regeneration of Poisoned Nickel Biomass Conditioning Catalysts},
author = {Yung, Matthew M. and Cheah, Singoong and Kuhn, John N. and Magrini-Bair, Kimberly A.},
abstractNote = {Sulfur K-edge XANES was used to monitor sulfur species transforming from sulfides to sulfates during steam + air regeneration on a Ni/Mg/K/Al{sub 2}O{sub 3} catalyst used to condition biomass-derived syngas. The catalyst was tested for multiple reaction/regeneration cycles. Post-reaction samples showed the presence of sulfides on the H{sub 2}S-poisoned nickel catalyst. Although some gaseous sulfur species were observed to leave the catalyst bed during regeneration, sulfur remained on the catalyst and a transformation from sulfides to sulfates was observed. The subsequent H{sub 2} reduction led to a partial reduction of sulfates back to sulfides. A proposed reaction sequence is presented and recommended regeneration strategies are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {1}
}

Conference:
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