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Title: Transformation of Sulfur Species during Steam/Air Regeneration on a Ni Biomass Conditioning Catalyst

Abstract

Sulfur K-edge XANES identified transformation of sulfides to sulfates during combined steam and air regeneration on a Ni/Mg/K/Al2O3 catalyst used to condition biomass-derived syngas. This catalyst was tested over multiple reaction/regeneration/reduction cycles. Postreaction catalysts showed the presence of sulfides on H2S-poisoned sites. Although H2S was observed to leave the catalyst bed during regeneration, sulfur remained on the catalyst, and a transformation from sulfides to sulfates was observed. Following the oxidative regeneration, the subsequent H2 reduction led to a partial reduction of sulfates back to sulfides, indicating the difficulty and sensitivity in achieving complete sulfur removal during regeneration for biomass-conditioning catalysts.

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:
1050140
Report Number(s):
NREL/JA-5100-55687
TRN: US201218%%496
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
ACS Catalysis
Additional Journal Information:
Journal Volume: 2; Journal Issue: 7
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AIR; BIOMASS; CATALYSTS; NICKEL; REGENERATION; REMOVAL; SENSITIVITY; STEAM; SULFATES; SULFIDES; SULFUR; TRANSFORMATIONS; XANES; nickel; biomass; sulfates; sulfides; regeneration

Citation Formats

Yung, Matthew M., Cheah, Singfoong, Magrini-Bair, Kimberly, and Kuhn, John N. Transformation of Sulfur Species during Steam/Air Regeneration on a Ni Biomass Conditioning Catalyst. United States: N. p., 2012. Web. doi:10.1021/cs3001545.
Yung, Matthew M., Cheah, Singfoong, Magrini-Bair, Kimberly, & Kuhn, John N. Transformation of Sulfur Species during Steam/Air Regeneration on a Ni Biomass Conditioning Catalyst. United States. doi:10.1021/cs3001545.
Yung, Matthew M., Cheah, Singfoong, Magrini-Bair, Kimberly, and Kuhn, John N. Fri . "Transformation of Sulfur Species during Steam/Air Regeneration on a Ni Biomass Conditioning Catalyst". United States. doi:10.1021/cs3001545.
@article{osti_1050140,
title = {Transformation of Sulfur Species during Steam/Air Regeneration on a Ni Biomass Conditioning Catalyst},
author = {Yung, Matthew M. and Cheah, Singfoong and Magrini-Bair, Kimberly and Kuhn, John N.},
abstractNote = {Sulfur K-edge XANES identified transformation of sulfides to sulfates during combined steam and air regeneration on a Ni/Mg/K/Al2O3 catalyst used to condition biomass-derived syngas. This catalyst was tested over multiple reaction/regeneration/reduction cycles. Postreaction catalysts showed the presence of sulfides on H2S-poisoned sites. Although H2S was observed to leave the catalyst bed during regeneration, sulfur remained on the catalyst, and a transformation from sulfides to sulfates was observed. Following the oxidative regeneration, the subsequent H2 reduction led to a partial reduction of sulfates back to sulfides, indicating the difficulty and sensitivity in achieving complete sulfur removal during regeneration for biomass-conditioning catalysts.},
doi = {10.1021/cs3001545},
journal = {ACS Catalysis},
number = 7,
volume = 2,
place = {United States},
year = {2012},
month = {7}
}