Removal of hydrogen sulfide from a steam-hydrogasifier product gas by zinc oxide sorbent: Effect of non-steam gas components

Title
Removal of hydrogen sulfide from a steam-hydrogasifier product gas by zinc oxide sorbent: Effect of non-steam gas components
Author(s)
김기석박노국
Keywords
TEMPERATURE H2S; HOT GAS; ZNO; DESULFURIZATION; REACTIVITY; BIOMASS; COS
Issue Date
201010
Publisher
ELSEVIER SCIENCE INC
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.16, no.6, pp.967 - 972
Abstract
Removal of H(2)S from a steam-hydrogasifier product gas was studied at 636 K and 1 atm using a commercially available zinc oxide sorbent in a packed-bed reactor. A mixture gas containing 22% CH(4), 18.7% H(2), 8.8% CO and 5.5% CO(2) (non-steam components subtotaling to 55%) balanced with steam was used to simulate the steam-hydrogasifier product gas. Sorbent particles of 150-250 mu m size were used to eliminate the effect of intraparticle mass transfer limitation. Experiments were conducted to monitor H(2)S breakthrough of reactor effluent stream for operation parameters such as space velocity and inlet H(2)S concentration. With space velocity varied from 6000 to 8000 to 12,000 h(-1) for inlet H(2)S concentration in the range of 100-800 ppmv, sulfur capture capacity of the sorbent (S(cap)) for 2 ppmv H(2)S breakthrough did not change notably, indicating that, for each inlet H(2)S concentration tested, sorbent utilization for sulfur removal was not affected by the space velocity. Meanwhile, for each space velocity tested, S(cap) increased monotonically as the inlet H(2)S concentration increased from 100 to 500 to 800 ppmv, which is opposite to the result observed for the mixture gas devoid of CH(4), H(2), CO and CO(2). As the overall content of these non-steam components of the simulation gas was halved for each inlet H(2)S concentration tested at 8000 h(-1) space velocity. S(cap) for non-steam gas components of 27.5% content corresponded approximately to the median value of those for the non-steam gas components of 55% and 0% content, suggestive of linear dependency of S(cap) upon the content of the non-steam components for the inlet H(2)S concentration tested. (C) 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/23512http://dx.doi.org/10.1016/j.jiec.2010.04.003
ISSN
1226-086X
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공과대학 > 화학공학부 > Articles
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