A study of Zn-Mn based sorbent for the high-temperature removal of H2S from coal-derived gas

Tzu Hsing Ko, Hsin Chu, Ya Jing Liou

研究成果: Article

49 引文 斯高帕斯(Scopus)

摘要

Zn-Mn based sorbents supported on SiO2, γ-Al2O3 and ZrO2, prepared by the incipient wetness impregnation method with calcination at 973 K were investigated for the removal of H2S from coal derived gas at the temperature ranges of 773-973 K. Results reveal that the SiO2 and ZrO2 supports exhibit the better performance because better removal efficiency. The addition of manganese effectually improves the vaporization of zinc. In addition, some operating parameters were also considered in order to understand as well as screen the suitable conditions for the development of Zn-Mn based sorbents on the removal of H2S. Over 98% sorbent utilization was established for the use of SiO2 at 873 K. On the other hand, within the 5-15 wt% of Zn-Mn oxides, no significant change in the sorbent utilization was observed. Up to 30 wt% the sorbent utilization decreased slightly compared to lower contents, which may be attributed to the deficient dispersion. With increasing the H2 concentration, the sorbent utilization decreases and an adverse result is observed in the case of increasing CO concentration. The relationship between CO and H2 could be explained via the water-gas shift reaction. Moreover, the apparent activation energy and frequency factor as well as the predicted results were studied with a deactivation model. The results of regression fitting reveal the accurate prediction breakthrough behaviors for the removal of H2S.

原文English
頁(從 - 到)334-341
頁數8
期刊Journal of Hazardous Materials
147
發行號1-2
DOIs
出版狀態Published - 2007 八月 17

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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