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

다국어 초록 (Multilingual Abstract)

A bench-scale continuous hot gas desulfurization system using Zn-based solid sorbents was developed to remove H2S and COS simultaneously in a 110 Nm3/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 oC and the high pressure of 19 kgf/cm2 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 H2S and COS in the syngas was measured by a continuous UV gas analyzer and an online gas chromatograph and that of both H2S 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%.

참고문헌 (Reference)

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9 이창근, "IGCC용 유동층 고온건식탈황공정에서 Zinc-Titanate 탈황제의 100시간 연속운전 성능실험" 한국화학공학회 40 (40): 246-251, 2002