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)
Article
Energy & Fuels
Honghu Li, Jingdong Zhang, Yanxiao Cao, Yuan Wang, Fei Li, Chaoyang Liu, Yongwei Song, Jiangjun Hu
Summary: By pyrolysis and sulfuric acid activation, a magnetic and sulfur-resistant sorbent (FSS-SA) was obtained for capturing elemental mercury from flue gas, showing enhanced Hg0 removal activity. Active oxygen and sulfur species derived from Fe2O3 and ferric polysulfide were found to be the active sites for Hg0 removal.
Article
Energy & Fuels
Qiang Zhou, Xin Tao, Guancheng Di, Yu Shang, Ping Lu, Guiling Xu, Mengting Liu, Yuqiu Zheng, Liang Dong
Summary: The Ce-doped Fe6Mn0.8Ce0.2Oy magnetic sorbent exhibits good SO2 tolerance and can be used for the circulating removal of mercury in high-temperature flue gas. Ce protects Mn4+ active sites from SO2 poisoning, while O-2 helps supplement oxygen vacancies in a timely manner, enhancing the sorbent's tolerance.
Article
Energy & Fuels
Qiang Zhou, Guancheng Di, Xin Tao, Tao Song, Ping Lu, Guiling Xu, Liang Dong
Summary: Doping molybdenum into Fe-Mn magnetic sorbent enhances mercury capture and SO2 tolerance, with O2 weakening SO2 inhibition on mercury capture and H2O intensifying SO2 poisoning. Mo doping modifies pore structure and disperses Mn-4(+) active sites, promoting SO2 oxidation to benefit mercury capture.
Article
Engineering, Environmental
Yan Shao, Jinhang Fan, Jiayi Li, Jiangxiu Yang, Yuan Wang, Hongcheng Ruan, Zihao Liu, Honghu Li, Yifei Long, Jiangjun Hu
Summary: Adding dysprosium to modify the Mn-Fe mixed oxide sorbent can enhance its Hg-0 removal performance and SO2 tolerance, making it a promising material for flue gas treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Xiaopeng Zhang, Yuying Wei, Lianhao Zhang, Xinxin Wang, Ning Zhang, Junjiang Bao, Gaohong He
Summary: Adsorption is an effective method for removing Hg0 from flue gas, and the morphology and active site of sorbents play a crucial role in the removal efficiency. By utilizing a hierarchical porous nanosheet-based nanotube structure, the mass transfer resistance can be reduced and more active sites can be provided. Organic-inorganic hybrid nanowires of Co-aspartic acid were used as a template to prepare CuCo2O4 sorbents with favorable physicochemical properties. The CuCo2O4-1-2 sorbent exhibited the best hierarchical porous nanosheet-based nanotube structure, excellent redox properties, high Hg0 removal efficiency of 89%, good poisoning resistance, and stability under specific conditions. The Cu-Co active site on the CuCo2O4 surface played a crucial role in capturing and activating O2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Wei Cui, Yang Xu, Guangqian Luo, Qingzhu Zhang, Zehua Li, Shibo Zhang
Summary: In this study, magnetic Cu-Fe binary oxide sorbents were modified by oxygen non-thermal plasma for efficient removal of elemental mercury from coal-fired flue gas. Plasma treatment improved the Fe3+, Cu2+, and lattice oxygen content in the sorbents, leading to higher Hg-0 removal efficiency. Both experimental results and kinetic model confirmed that chemisorption is the dominant factor for Hg-0 removal over the modified sorbents.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Zijian Zhou, Lei Liu, Xiaowei Liu, Yue Zhou, Changqing Wang, Jingying Xu, Guozhang Chang, Minghou Xu
Summary: MnOx-based oxides are efficient catalysts for elemental mercury oxidation in flue gas, and combining with CeO2 or CeO2-ZrO2 enhances their catalytic activity. The new MnOx-CeO2-ZrO2 solid solution catalyst showed better Hg-0 oxidation performance compared to the MnOx/CeO2-ZrO2 supported catalyst. Mn4+ and surface active oxygen were identified as the active species in Hg-0 oxidation reactions, and SO2 significantly inhibited the activity of MnOx/CeO2-ZrO2 but had less impact on MnOx-CeO2-ZrO2 solid solution.
Article
Chemistry, Multidisciplinary
Xue-Lei Duan, Chun-Gang Yuan, Tian-Tian Jing, Xiao-Dong Yuan
Summary: This study explored a new preparation method for biomass-based activated carbon using levant cotton exocarp, with a focus on its efficiency and mechanism for Hg-0 removal through various experiments and analyses involving simulated coal-fired flue gas components and advanced characterization techniques.
Article
Engineering, Chemical
Chao Geng, Ruikang Lin, Peilin Yang, Pengfei Liu, Li Guo, Yishan Fang, Bo Cui
Summary: In this study, Fe-Mn nano-cluster structure was prepared and composited with corn starch-based carbon to fabricate Fe-Mn doped starch-based porous carbon adsorbents (Fe-Mn@SCAs), which showed good adsorption performance for Hg(II) in water. The adsorption mechanism and properties of the adsorption process for Hg(II) were revealed through batch adsorption experiments and thermodynamic studies, and the selective adsorbability and regenerability of the adsorbent were demonstrated.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Environmental
Youcai Zhu, Caiting Li, Yue Lyu, Shanhong Li, Yindi Zhang, Xueyu Du, Yunbo Zhai
Summary: The experimental results revealed that SO2 has a dual effect on Hg removal, acting both as a promoter and an inhibitor. Under specific conditions, HCl was found to significantly promote Hg removal. The 1V-8Ce/AC sorbent exhibited good sulfur resistance and stability under high temperature and high SO2 concentration conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Qiang Ma, Lijun Jiang, Bowen Yang, Bowen Xu, Qingyuan Wang, Qihong Wu, Ping Ning, Yingjie Zhang, Jin Huang, Jiming Hao
Summary: Gaseous thallium (Tl) pollution events caused by nonferrous mineral refineries and fossil fuel combustion have increased. The synthesized MnO2/CeO2@ HKUST-1 (MCH) achieved a 90% removal rate of gaseous Tl(I) at 423K and a weight hourly space velocity (WHSV) of 2000 h(-1)/ mL with a 10% Mn dose for 10 hours. Among the four kinetic models applied, the Mars-van Krevelen (MVK) model showed the most reliable results.
Article
Energy & Fuels
Honghu Li, Qingyi LiLiu, Jiayi Li, Jiangxiu Yang, Yifei Long, Yuan Wang, Jiangjun Hu
Summary: This study presents a facile method to prepare a cost-effective and magnetically responsive mercury sorbent. The sorbent shows good Hg-0 capture ability and remains effective under harsh gas conditions. It also demonstrates good recyclability and SO2 resistance, with a lower cost compared to traditional carbon-based mercury sorbents.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
Article
Engineering, Environmental
Shu Yang, Cao Liu, Pingshan Wang, Huimin Yi, Fenghua Shen, Hui Liu
Summary: A novel Co9S8 nanoparticles-embedded porous carbon was designed for efficient Hg-0 capture from smelting flue gas, showing better adsorption capacity and recyclability compared to other materials. The Co9S8-PC demonstrates a significantly large Hg-0 adsorption capacity of 43.18 mg/g and a sustainable approach for Hg-0 recovery.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Lingyan Le, Hui Wang, Qingshan Zeng, Kang Yang, Yiwen Zhang, Hengyuan Ran, Dong Liu
Summary: This study proposes using acid-chlorine-modified rice straw coke as an adsorbent for the removal of mercury pollution from coal-fired power plants. The modification increases surface pore structure and oxygen-containing functional groups, enhancing the adsorbent's mercury removal capacity. The optimal effect is achieved at an acid-chlorine ratio and mass ratio of 1:2, and the reaction temperature and inlet mercury concentration significantly impact mercury removal efficiency. The adsorption process is primarily controlled by surface mass transfer and chemisorption, with Cl and O atoms playing important roles in facilitating mercury removal.