Screening of Zinc-Based Sorbents for Hot-Gas Desulfurization

Highly reactive and attrition-resistant ZnO-based sorbents that are suitable for bubbling fluidized-bed reactors can be produced using the spray-drying method. Most of the ZnO-based sorbents prepared here (ZAC-X, X = 18N−25N) satisfy the physical and chemical criteria for bubbling fluidized-bed appl...

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Bibliographic Details
Published in:Energy & fuels 2008-03, Vol.22 (2), p.1021-1026
Main Authors: Lee, Joong B, Ryu, Chong K, Yi, Chang K, Jo, Sung H, Kim, Sung H
Format: Article
Language:English
Subjects:
01 COAL, LIGNITE, AND PEAT
ADSORBENTS
Air pollution caused by fuel industries
Applied sciences
attrition
DESULFURIZATION
Energy
Energy. Thermal use of fuels
Environmental
Exact sciences and technology
FLUIDIZED BED REACTORS
Fuels
HOT GAS CLEANUP
Korea, Rep
Particle size
PERFORMANCE TESTING
Pollution reduction
Q1
Q3
REGENERATION
Sorbents
Sorption
Stack gas and industrial effluent processing
SULFIDATION
Sulfur
WEAR RESISTANCE
ZINC COMPOUNDS
ZINC OXIDES
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Summary:Highly reactive and attrition-resistant ZnO-based sorbents that are suitable for bubbling fluidized-bed reactors can be produced using the spray-drying method. Most of the ZnO-based sorbents prepared here (ZAC-X, X = 18N−25N) satisfy the physical and chemical criteria for bubbling fluidized-bed application [spherical shape, average particle size, 90−110 µm; size distribution, 40−230 µm; bulk density, 0.9−1.0 g/mL; attrition index (AI), 40−80%; sulfur sorption capacity, 14−17 wt %; sorbent use, 70−80%]. The performance test of the ZAC-C sorbent at Korea Institute of Energy Research (KIER) with a bubbling fluidized-bed for 70 h also demonstrated that it had good sulfidation and regeneration performance (11 wt % sorption capacity and 52% sorbent use) as well as reasonable attrition resistance (1.1% attrition loss for 70 h).
ISSN:0887-0624
1520-5029
DOI:10.1021/ef7004089