Removal and Transformation of Sulfur Species During Regeneration of Poisoned Nickel Biomass Conditioning Catalysts
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.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1042501
- Report Number(s):
- NREL/AB-5100-54805; TRN: US201212%%789
- 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
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