Simultaneous removal of H2S and COS using Zn-based solid sorbents in the bench-scale continuous hot gas desulfurization system integrated with a coal gasifier

Simultaneous removal of H2S and COS using Zn-based solid sorbents in the bench-scale continuous hot gas desulfurization system integrated with a coal gasifier

A bench-scale continuous hot gas desulfurization system using Zn-based solid sorbents was developed to remove H 2 S and COS simultaneously in a 110 Nm 3 /h of real coal-gasified syngas. The bench-scale unit, which consisted of a fast fluidized-bed type desulfurizer and a bubbling fluidized-bed type...

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Bibliographic Details
Published in:The Korean journal of chemical engineering Vol. 29; no. 12; pp. 1812 - 1816
Main Authors: Park, Young Cheol, Jo, Sung-Ho, Ryu, Ho-Jung, Moon, Jong-Ho, Yi, Chang-Keun, Yoon, Yongseung, Baek, Jeom-In
Format: Journal Article
Language:English
Published: Boston Springer US 01-12-2012
한국화학공학회
Subjects:
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Fluidization
Industrial Chemistry
Industrial Chemistry/Chemical Engineering
Materials Science
Particle Technology
Polymer
화학공학
Bench-scale Unit
Integration with a Coal Gasifier
IGCC
Hot Gas Desulfurization
Solid Sorbents
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Summary:A bench-scale continuous hot gas desulfurization system using Zn-based solid sorbents was developed to remove H 2 S and COS simultaneously in a 110 Nm 3 /h of real coal-gasified syngas. The bench-scale unit, which consisted of a fast fluidized-bed type desulfurizer and a bubbling fluidized-bed type regenerator, was integrated with a 3 ton/day-scale coal gasifier installed at the Institute for Advanced Engineering. The solid sorbents, which consisted of 50 wt% of ZnO for sulfides sorption and 50 wt% of supporters for mechanical strength, were manufactured by a spray drying method and supplied by Korea Electric Power Corporation Research Institute. The bench-scale unit was designed to operate at the high temperature of above 500 °C and the high pressure of 19 kg f /cm 2 gauge. Integration of the bench-scale unit with a coal gasifier was first performed to investigate the operation stability of the integrated system. And the long-term continuous operation above 30 h was performed to analyze the desulfurization performance of the bench-scale unit. The concentration of both H 2 S and COS in the syngas was measured by a continuous UV gas analyzer and an online gas chromatograph and that of both H 2 S and COS after desulfurization was measured by an online gas chromatograph. Through the above 30-h continuous operation, the sulfur removal reached up to 99.9%.
Bibliography:G704-000406.2012.29.12.004
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-012-0059-3