Full Text:   <278>

Summary:  <36>

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On-line Access: 2022-07-19

Received: 2021-12-10

Revision Accepted: 2022-01-27

Crosschecked: 2022-07-19

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Dong YE

https://orcid.org/0000-0001-8299-224X

Hai-ning WANG

https://orcid.org/0000-0003-4653-0819

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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.7 P.505-526

http://doi.org/10.1631/jzus.A2100627


Review of elemental mercury (Hg0) removal by CuO-based materials


Author(s):  Dong YE, Xiao-xiang WANG, Run-xian WANG, Xin LIU, Hui LIU, Hai-ning WANG

Affiliation(s):  College of Quality & Safety Engineering, China Jiliang University, Hangzhou 310018, China; more

Corresponding email(s):   Richard32@126.com, whnfyy@163.com

Key Words:  Hg0 capture capability, CuO-based materials, Hg0 removal mechanisms, Gas components, Simultaneous removal of multiple pollutants


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Dong YE, Xiao-xiang WANG, Run-xian WANG, Xin LIU, Hui LIU, Hai-ning WANG. Review of elemental mercury (Hg0) removal by CuO-based materials[J]. Journal of Zhejiang University Science A, 2022, 23(7): 505-526.

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doi="10.1631/jzus.A2100627"
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Abstract: 
Mercury emission has become a great environmental concern because of its high toxicity, bioaccumulation, and persistence. Adsorption is an effective method to remove Hg0 from coal-fired flue gas, with adsorbents playing a dominant role. Extensive investigations have been conducted on the use of cuO-based materials for Hg0 removal, and some fruitful results have been obtained. In this review, we summarize advances in the application of cuO-based materials for Hg0 capture. Firstly, the fundamentals of CuO, including its crystal information and synthesis methods, are introduced. Then, the Hg0 removal capability of some typical CuO-based adsorbents is discussed. Considering that coal-fired flue gas also contains a certain amount of NO, SO2, H2O, NH3, and HCl, the impacts of these species on adsorbent Hg0 removal efficiency are summarized next. By generalizing the mechanisms dominating the Hg0 removal process, the rate-determining step and the key intermediates can be discovered. Apart from Hg0, some other air pollutants, such as CO, NOx, and volatile organic compounds (VOCs), account for a certain portion of flue gas. In view of their similar abatement mechanisms, simultaneous removal of Hg0 and other air pollutants has become a hot topic in the environmental field. Considering the Hg0 re-emission phenomena in wet flue gas desulfurization (WFGD), mercury capture performance under different conditions in this device is discussed. Finally, we conclude that new adsorbents suitable for long-term operation in coal-fired flue gas should be developed to realize the effective reduction of mercury emissions.

氧化铜基脱汞剂的进展研究

作者:叶栋1,王晓祥2,王润贤1,刘欣1,刘辉1,王海宁1
机构:1中国计量大学,质量与安全工程学院,中国杭州,310018;2浙江大学,化学工程与生物工程学院,工业生态与环境研究所,教育部生物质化工重点实验室,中国杭州,310027
概要:汞作为一种高毒性、生物累积性以及持久性的大气污染物,它的排放对环境安全造成了严重影响。吸附法是一种燃煤烟气汞的有效脱除方法,在这项技术中吸附剂起到了决定性的作用。目前,研究者们在氧化铜基材料脱除气态汞方面进行了详细的研究,并取得了丰硕的成果。在本文中,我们总结了氧化铜基材料脱除气态汞方面的研究进展。首先,文章介绍了氧化铜的基本信息,包括氧化铜的晶体结构以及相应的合成方法。其次,文章介绍了一些典型氧化铜基吸附剂的汞脱除性能。考虑到实际烟气还包含NO、SO2、H2O、NH3以及HCl等组分,我们也介绍了这些组分对吸附剂Hg0脱除性能的影响。通过总结Hg0脱除机理,可以揭示其中的重要中间产物以及速控步骤。除了Hg0之外,烟气中还包含CO、NOx以及可挥发性有机物等污染物。由于这些污染物具有类似的脱除机理,因此多污染物协同脱除正成为环境领域中的一个热点。本文第六章对这一方面进行了着重讨论。最后,我们得出结论:开发适应复杂烟气工况的新型汞吸附剂是实现燃煤烟气汞减排的有效方法。

关键词:Hg0捕集性能;氧化铜基材料;Hg0脱除机理;烟气组分;多污染物协同脱除

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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