New development of zinc-based sorbents for hot gas desulfurization |
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Authors: | Xuepeng Bu Youju Ying Xuguo Ji Cuiqing Zhang Wanwang Peng |
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Affiliation: | 1. Beijing Research Institute of Coal Chemistry, China Coal Research Institute, Qingniangoulu No 5, Beijing 100013, P R China;2. Southern Company Services, P. O. Box 1069, Wilsonville, Alabama, 35186, USA |
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Abstract: | This paper introduced two new zinc-based sorbents for hot gas desulfurization, G-201 and G-202. Evaluation tests proved that both G-201 and G-202 sorbents had good performance in desulfurization. They could reduce H2S concentration from about 10 g/m3 in coal gas to less than 20 mg/m3. In addition, the sulfur capacity of both sorbents increased with temperature rising. No decrease in sulfur capacity of G-201 occurred during 20-desulfurization/regeneration cycle tests, whose calculated value was 19.43–24.23 g/100 g sorbent. G-201 sorbent passed a 1500 h real hot gas desulfurization test in a fixed-bed PDU. No occurence of striping, attrition and sintering on the surface of used sorbents was found after the long-time test. The reactivity was stable and the sulfur capacity is 21.19 g/100 g sorbent after the 1500 h test. |
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Keywords: | Hot gas desulfurization (HGD) Zn-based Sorbent IGCC |
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