Study on Deactivation of Zinc-Based Sorbents for Hot Gas Desulfurization

Title
Study on Deactivation of Zinc-Based Sorbents for Hot Gas Desulfurization
Author(s)
류시옥박노국이태진
Keywords
H2S REMOVAL; ELEVATED-TEMPERATURE; TITANATE SORBENTS; FLUIDIZED-BED; COAL-GAS; PRESSURE; OXIDES; IGCC
Issue Date
201005
Publisher
AMER CHEMICAL SOC
Citation
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.49, no.10, pp.4694 - 4699
Abstract
The possible reasons that were associated with the reduction of zinc oxide and the deposition of elemental Zn on the zinc-based sorbent surfaces were proposed in this study and examined by monitoring chemical reactivity and physical/chemical properties of the sorbents during the multicyclic tests with the aid of various diagnostics in order to investigate the deactivation of the sorbents that was observed in previous works. The reactivity of the sorbents was investigated using a temperature programmed technique (TPT) with a thermal gravimetric analyzer (TGA). From our experiments, the undesirable features due to the reduction of ZnO that was caused by the reducing components in the gasified coal gas were observed in the chemical reactivity and sorbent properties. In the investigation of the migration of elemental Zn onto the sorbent surface, elemental Zn accumulated on the surface of the sorbents rather than the zinc vaporization. It might have caused the deactivation of the zinc-based sorbents.
URI
http://hdl.handle.net/YU.REPOSITORY/22474http://dx.doi.org/10.1021/ie9017463
ISSN
0888-5885
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공과대학 > 화학공학부 > Articles
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