期刊
CHEMICAL ENGINEERING JOURNAL
卷 430, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132857
关键词
Indium Sulfide; Active sulfur site; Mercury adsorption; Reaction mechanism
资金
- National Natural Science Foundation of China [52076126]
- Natural Science Foundation of Shanghai [18ZR1416200]
- Projects of Shanghai Science and Technology Committee [20DZ1205207]
- Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry
Mercury emissions from coal-fired power plants are a global environmental issue, and the In2S3/g-C3N4 adsorbent prepared in this study showed excellent performance in removing Hg-0 from flue gas. With a loading value of 40% In2S3, the synthesized IC-40 demonstrated the best effect in Hg-0 removal, especially at a temperature range of 80-240 degrees C.
Mercury emission from coal-fired power plants has posed a great threat to the environment and human, and reducing and controlling mercury emissions has become a global environmental issue. In this work, the In2S3/g-C3N4 adsorbent was prepared by simple hydrothermal method to achieve efficient removal of Hg-0 from coal-fired flue gas. When the loading value of In2S3 was 40 %, the effect of removing Hg-0 by as-synthesized IC-40 was the best. IC-40 showed excellent Hg-0 adsorption performance in a temperature range of 80-240 degrees C. Under the condition of 120 degrees C and N-2 atmosphere, the Hg-0 adsorption capacity of the synthesized IC-40 reached 14.78 mg/g. The study on the impacts of flue gas components demonstrate that IC-40 has good resistance to nitric oxide, and has a slight inhibitory effect by SO2 and water vapor. According to the results of XPS and Hg-TPD, the formed main mercury compound is extremely stable HgS. In addition, DFT was conducted to calculate the adsorption energy of Hg-0 on In2S3 (1 1 0) surface, which further illustrated the sulfur site served as stable adsorption site to convert Hg-0 into HgS. From the above analysis, IC-40 as an efficient and scientific adsorbent to remove Hg-0 from coal-fired power plants is a promising technical method.
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