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On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

Crosschecked: 2024-08-20

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Dong YE

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

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Journal of Zhejiang University SCIENCE A 2024 Vol.25 No.8 P.680-686

http://doi.org/10.1631/jzus.A2300276


Enhancement in the Hg0 oxidation efficiency and sulfur resistance of CuCl2-modified MnOx-CeOx nanorod catalysts


Author(s):  Shujie GAO, Yongjin HU, Zhichang JIANG, Xiaoxiang WANG, Dong YE, Changxing HU

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

Corresponding email(s):   Richard32@126.com, huchx@zju.edu.cn

Key Words:  Hg0 oxidation, CuCl2 modification, MnOx-CeOx nanorods, Sulfur resistance, Oxidation activity


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Shujie GAO, Yongjin HU, Zhichang JIANG, Xiaoxiang WANG, Dong YE, Changxing HU. Enhancement in the Hg0 oxidation efficiency and sulfur resistance of CuCl2-modified MnOx-CeOx nanorod catalysts[J]. Journal of Zhejiang University Science A, 2024, 25(8): 680-686.

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author="Shujie GAO, Yongjin HU, Zhichang JIANG, Xiaoxiang WANG, Dong YE, Changxing HU",
journal="Journal of Zhejiang University Science A",
volume="25",
number="8",
pages="680-686",
year="2024",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300276"
}

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%T Enhancement in the Hg0 oxidation efficiency and sulfur resistance of CuCl2-modified MnOx-CeOx nanorod catalysts
%A Shujie GAO
%A Yongjin HU
%A Zhichang JIANG
%A Xiaoxiang WANG
%A Dong YE
%A Changxing HU
%J Journal of Zhejiang University SCIENCE A
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%P 680-686
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%D 2024
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300276

TY - JOUR
T1 - Enhancement in the Hg0 oxidation efficiency and sulfur resistance of CuCl2-modified MnOx-CeOx nanorod catalysts
A1 - Shujie GAO
A1 - Yongjin HU
A1 - Zhichang JIANG
A1 - Xiaoxiang WANG
A1 - Dong YE
A1 - Changxing HU
J0 - Journal of Zhejiang University Science A
VL - 25
IS - 8
SP - 680
EP - 686
%@ 1673-565X
Y1 - 2024
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2300276


Abstract: 
In this study, a series of CuCl2-modified mnOx-CeOx nanorods were synthesized for the oxidation of Hg0. The addition of CuCl2 resulted in an enhancement in the catalyst's hg0 oxidation ability, and hg0 oxidation efficiency reached >97% from 150 to 250 °‍C. In the MnOx-CeOx catalysts, Mn4+ played the role of the active species for Hg0 oxidization, but in the CuCl2-doped catalysts Cl- also contributed to hg0 oxidation, conferring the superior performance of these samples. The introduction of SO2 led to a decrease in the availability of Mn4+, and the hg0 oxidation efficiency of MnOx-CeOx decreased from about 100% to about 78%. By contrast, CuCl2-promoted samples maintained a hg0 oxidation efficiency of about 100% during the SO2 deactivation cycle due to the high reactivity of Cl-.

CuCl2改性对MnOx-CeOx纳米棒催化剂汞氧化性能及抗硫性能的提升机理研究

作者:高淑洁1,胡永金1,蒋志昌1,王晓祥2,叶栋1,胡长兴3
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,化工学院,工业生态与环境研究所,中国杭州,310027;3浙大宁波理工学院,机电与能源工程学院,中国宁波,315100
目的:针对燃煤电站多变的烟气条件,研究适用于高汞、含硫烟气的催化剂。
创新点:1.通过水热法合成锰铈氧化物纳米棒,可实现高汞含硫烟气条件下的高效脱汞;2.通过添加CuCl2,在保证催化剂的汞氧化性能的同时,提升其抗硫性能。
方法:利用固定床微反应器对催化剂的汞氧化性能进行研究,并结合物化表征建立催化剂的构效关系,进而揭示CuCl2改性催化剂的抗硫机理。
结论:1.添加CuCl2提升了催化剂的汞氧化性能:在150~250°C温度区间内,催化剂的汞养护效率为100%;在含硫气氛下反应320 min后,锰铈氧化物的汞氧化效率由100%下降到78%;对于CuCl2改性催化剂,共氧化性能依旧维持在100%。2.对于锰铈氧化物催化剂,Mn4+为主要的活性位点;对于CuCl2改性催化剂,除了Mn4+外,Cl?也是其中的活性位点。3.在含硫气氛下,Mn4+利用量的下降是导致锰铈氧化物催化剂活性下降的主要原因,而高反应活性Cl?的存在是CuCl2改性催化剂保持高汞脱除效率的主要原因。

关键词:汞氧化;CuCl2改性;锰铈氧化物纳米棒;抗硫性能;氧化活性

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