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Liu W, Min X, Zhao J, Zhao S. Pilot-Scale Experimental Investigation on Dry Capture of Mercury and SO 3 in Smelting Gas of Acid Making. ACS OMEGA 2023; 8:42741-42747. [PMID: 38024732 PMCID: PMC10652368 DOI: 10.1021/acsomega.3c05443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
In this study, a novel dry capture process utilizing a mixed adsorbent of ZnO and CuS was proposed for the simultaneous removal of Hg0 and SO3 in flue gas from zinc smelting, addressing severe mercury pollution and high SO3 concentrations. The experimental results showed that flue gas cooling caused the SO3 to transform into sulfuric acid mist, which changed the reaction mechanism from a gas-solid to a liquid-solid reaction and helped to improve the SO3 removal efficiency. Additionally, properly increasing the absorbent/SO3 molar ratio significantly improved the SO3 removal performance. However, excessive absorbent injection could cause aggregation and uneven dispersion of the absorbent particles in the flue gas, therefore impairing the effectiveness of SO3 capture. Under typical operating conditions (flue gas flow rate of 3500 m3/h, flue gas temperature of 180 °C, ZnO/SO3 molar ratio of 0.74, and residence time of 0.5 s), using a mixed absorbent of ZnO and CuS achieved an SO3 removal efficiency of up to 32.6%, and a total mercury capture at 43.2%, of which the Hg0 removal attained a remarkable 76.3%. These results preliminarily confirm the feasibility of the dry capture technology for simultaneous removal of SO3 and mercury, laying the foundation for further application and promotion.
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Affiliation(s)
- Wei Liu
- Jiangsu
Environmental Engineering Technology Co. Ltd., Nanjing, Jiangsu 210019, China
- Jiangsu
Provincial Environmental Protection Group Co. Ltd., Nanjing, Jiangsu 210036, China
- Jiangsu
Province Engineering Research Center of Standardized Construction
and Intelligent Management of Industrial Parks, Nanjing, Jiangsu 210019, China
| | - Xin Min
- School
of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Jin Zhao
- School
of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Songjian Zhao
- School
of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
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Ai W, Wang J, Wen J, Wang S, Tan W, Zhang Z, Liang K, Zhang R, Li W. Research landscape and hotspots of selective catalytic reduction (SCR) for NO x removal: insights from a comprehensive bibliometric analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:65482-65499. [PMID: 37081369 DOI: 10.1007/s11356-023-26993-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023]
Abstract
Selective catalytic reduction (SCR) has been one of the most efficient and widely used technologies to remove nitrogen oxides (NOx). SCR research has developed rapidly in recent years, which can be reflected by the dramatic increase of related academic publications. Herein, based on the 10,627 documents from 2001 to 2020 in Web of Science, the global research landscape and hotspots in SCR are investigated based on a comprehensive bibliometric analysis. The results show that SCR research has developed positively; the annul number of articles increase sharply from 246 in 2001 to 1092 in 2020. People's Republic of China and Chinese Academy of Sciences are the most productive country and institution, respectively. The global collaboration is extensive and frequent, while People's Republic of China and USA have the most frequent research cooperation. Applied Catalysis B-Environmental is the leading publication source with 711 records. Five major research areas on SCR are identified and elaborated, including catalyst, reductant, deactivation, mechanism, and others. Zeolite is the most widely studied SCR catalyst, while copper, silver, platinum, and iron are the most popular metal elements in catalyst. Ammonia (NH3) is dominated among various SCR reductants, while hydrocarbon reductant has gained more attention. Sulfur dioxide (SO2) and vapor are the two most concerned factors leading to catalyst deactivation, and catalyst regeneration is also an important research topic. Density functional theory (DFT), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and kinetics are the most widely used methods to conduct mechanism study. The studies on "low temperature," "atomic-scale insight," "elemental mercury," "situ DIRFTS investigation," "arsenic poisoning," "SPOA-34," "Cu-CHA catalyst," "TiO2 catalyst," and "Ce catalyst" have been the hotspots in recent years.
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Affiliation(s)
- Weikun Ai
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Jiabin Wang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Junhui Wen
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Shuai Wang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Wanting Tan
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Zhenzong Zhang
- College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, People's Republic of China
| | - Ke Liang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Ruiqin Zhang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
- Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, People's Republic of China
| | - Wenjie Li
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China.
- Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, People's Republic of China.
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Yeo W, Shin D, Kim MH, Han JW. Change in the Electronic Environment of the VO x Active Center via Support Modification to Enhance Hg Oxidation Activity. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Woonsuk Yeo
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Dongjae Shin
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
| | - Moon Hyeon Kim
- Department of Environmental Engineering, Daegu University, Gyeongsan, Gyeongbuk 38453, Republic of Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Republic of Korea
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Su J, Yang J, Zhang M, Gao M, Zhang Y, Gao M, Chen L, Huang Y, Wang Z, Shen B. Improvement Mechanism of Ru Species on Hg0 Oxidation Reactivity over V2O5/TiO2 Catalyst: A Density Functional Theory Study. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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