Article
Energy & Fuels
Huan Liu, Zhuo Xiong, Rong Peng, Bengen Gong, Lin Chang, Jianping Yang, Yongchun Zhao, Junying Zhang
Summary: The study investigated the efficacy of CuBr2-TCS as an adsorbent for removing Hg-0 in simulated coal-fired flue gas, demonstrating high removal efficiency. The in-depth exploration of Hg-0 removal performance under different flue gas components proved that CuBr2-TCS has a good removal effect on Hg-0.
Article
Energy & Fuels
Yang Xu, Mengli Zhou, Mantang Chen, Qingzhu Zhang, Lin Du, Guangqian Luo
Summary: Natural ferruginous manganese ore (FMO) was developed as an economical NH3-SCR catalyst for simultaneous elimination of NO and elemental mercury (Hg0) from coal-fired flue gas. The chemical composition, pore structure, crystal structure and surface chemistry of FMO were characterized and the effects of various parameters on the removal efficiency of NO and Hg0 were studied. The results showed that FMO exhibited high removal efficiency for both NO and Hg0 under optimal conditions.
Review
Engineering, Environmental
Ting Liu, Zhuo Xiong, Peng Ni, Zizhen Ma, Yan Tan, Zishun Li, Shengnan Deng, Yincui Li, Qirong Yang, Huawei Zhang
Summary: This review focuses on the current situation of Hg0 removal on different kinds of adsorbents in coal combustion flue gas, smelting flue gas, and natural gas. Hydrophobic groups, hydrophobic materials, and modification of sulfur/selenium pretreatment and metals loading can effectively overcome the problem of H2O and SO2. Additionally, separation, regeneration, and recovery aspects are explored and summarized, with thermal treatment accompanied by different components being widely adopted as an efficient approach to recover the adsorption ability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Haomiao Xu, Qinyuan Hong, Zhao-Yang Zhang, Xiangling Cai, Yurui Fan, Zhisong Liu, Wenjun Huang, Naiqiang Yan, Zan Qu, Lizhi Zhang
Summary: A superstable Hg3Se2Cl2 compound is discovered and proven to be a promising solution for efficient and safe flue gas mercury removal. The compound exhibits high thermal stability and strong acid resistance, and laboratory experiments demonstrate its exceptional performance in removing mercury from flue gas. This study highlights the importance of stable demercury products in flue gas treatment and provides an efficient and practical demercury strategy.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Dong Ye, Xiaoxiang Wang, Runxian Wang, Senyuan Wang, Hui Liu, Haining Wang
Summary: This review discusses the progress in the application of MnO2-based materials for mercury removal, summarizing the fundamentals of MnO2, the properties of various adsorbents, and the effects of gas species on mercury capture capacity. The possible mercury adsorption mechanisms and regeneration methods are also explored, with a suggestion for the development of new MnO2-based adsorbents for future research.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Engineering, Environmental
Honghu Li, Xiyan Peng, Miao An, Jingdong Zhang, Yanxiao Cao, Wenjie Liu
Summary: Adsorption and catalytic oxidation are the most cost-effective and feasible methods for Hg0 removal from coal-fired flue gas. However, SO2 poisoning remains a challenge for the long-term operation of most developed catalysts/sorbents. This review comprehensively discusses the negative effect of SO2 on mercury removal and proposes strategies to cope with the SO2 poisoning problem.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Kening Yao, Xiao Zhang, Boxiong Shen, Qiqi Shi, Shuhao Li, Feng Shen
Summary: This study aims to design an efficient adsorbent for high-efficiency removal of elemental mercury (Hg0) from coal-fired power plant emissions. By co-implanting porous TiO2 with inorganic-organic dual functional sites (-SH and MnOx), the 2SH-MnOx/TiO2 adsorbent achieved a Hg0 removal efficiency of 90% at 175 degrees C and a high gas hourly space velocity (GHSV) of 120,000 h-1. The co-existence of -SH and MnOx was found to promote Hg0 adsorption and enhance the transfer of electrons from Hg0 to the adsorbent surface.
Article
Engineering, Environmental
Xue-Lei Duan, Chun-Gang Yuan, Qi Guo, Sheng-Li Niu, Kai-Qiang He, Guo-Wei Xia
Summary: A multifunctional core-shell sorbent based on halloysite nanotubes was successfully fabricated and applied for Hg-0 removal from flue gas. The unique structure and composition not only enabled easy separation and reuse, but also significantly enhanced the adsorption capacity and SO2 tolerance of the sorbent.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Lu Dong, Hai Wang, Yaji Huang, Hao Chen, Haoqiang Cheng, Lingqin Liu, Ligang Xu, Jianrui Zha, Mengzhu Yu, Sheng Wang, Yufeng Duan
Summary: Magnetic manganese-iron modified attapulgite sorbents were synthesized and shown to have optimal Hg-0 removal activity in coal-fired flue gas under certain conditions, which could potentially reduce costs and maximize the utilization of green energy sources.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Energy & Fuels
Zhiqiang Sun, Anjun Ma, Shilin Zhao, Hui Luo, Xingyu Xie, Yiren Liao, Xin Liang
Summary: Petroleum coke is a potential substance to replace activated carbon for mercury removal. Pyrolysis and SO2 activation can enhance the mercury removal ability of petroleum coke, especially mechanochemical modification can achieve very high mercury removal efficiency. Further studies are needed to explore the impact of different parameters on the properties of petroleum coke and the mechanisms of modification and mercury removal.
Article
Chemistry, Physical
Mengli Zhou, Yang Xu, Guangqian Luo, Qingzhu Zhang, Lin Du, Zehua Li
Summary: This study prepared Ce-Fe binary oxide modified bentonite for mercury removal from flue gas. The modified bentonite showed better removal performance and the removal mechanism was revealed. Furthermore, the deactivated modified bentonite can be effectively regenerated after thermal treatment.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Haonan Pei, Xiaokun Li, Yubao Song, Meilin Zhang, Daolei Wang, Jiang Wu, Fangjun Wang, Yi Zhang, Xinyi Zhao, Tao Jia
Summary: Research has shown that LaFeO3 has the best performance for mercury removal from flue gas, with high removal efficiency and repeatability, making it suitable for coal-fired power plants. Experimental results also indicate that the removal mechanism of LaFeO3 may be related to the change in iron valence and release of lattice oxygen.
Article
Chemistry, Multidisciplinary
Senyuan Wang, Dong Ye, Xin Liu, Haining Wang, Wei Ma, Hui Liu
Summary: A series of Mn-Cr mixed oxide adsorbents were synthesized using co-precipitation method. The effects of Mn/Cr molar ratio, reaction temperature, calcination temperature, initial mercury concentration, and flue gas constituents on mercury removal were investigated. MnCr1:3 with an optimal Mn/Cr molar ratio showed the highest efficiency (>95.4%) in a wide temperature range (100-250 degrees C) for mercury removal. The physicochemical properties and mechanism were characterized using various techniques. MnCr1:3 facilitated mercury removal due to its larger surface area, smaller crystallite sizes, higher acidity, and redox properties. Sulfur dioxide promoted elemental mercury capture for MnCr1:3. After five regeneration cycles, MnCr1:3 maintained a relative activity of 100%. The combined effect of manganese and chromium resulted in an increase in high valence metal elements and surface adsorbed oxygen, which played a vital role in mercury removal.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Engineering, Chemical
Shilin Zhao, Kang Sun, Hui Luo, Yuchen Wang, Yanqun Zhu, Zhiqiang Sun
Summary: Optimizing the injection system significantly reduces the cost of mercury removal from coal-fired flue gas using adsorbent injection technology. Three common injection system layouts (SFP, QT, and L-S) were systematically investigated to understand their effects on adsorbent and mercury concentration, as well as mercury removal efficiency. The results showed that SFP arrangement had the best performance in terms of adsorbent coverage, average standard deviation coefficient, and mercury removal efficiency. The coupling between particle concentration and flue gas mercury concentration field is crucial for achieving high mercury removal performance.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Energy & Fuels
Weimeng Zhao, Xinze Geng, Jincheng Lu, Yufeng Duan, Shuai Liu, Peng Hu, Yifan Xu, Yaji Huang, Jun Tao, Xiaobing Gu
Summary: The study demonstrated that brominated biomass activated carbon is an effective alternative adsorbent with good mercury removal performance in different scale experiments.