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.
Review
Green & Sustainable Science & Technology
Alhadi Ishag, Yanxue Yue, Jingting Xiao, Xinshui Huang, Yubing Sun
Summary: This article reviews recent advances in the adsorption and oxidation of mercury from coal-fired flue gases, including the mechanisms of adsorption and catalytic oxidation under different environmental conditions. It also addresses current challenges and future research directions.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Yang Teng, Peixuan Li, Guangyu Wang, Chen Wang, Nana Qi, Kai Zhang, Minwu Wang
Summary: Field testing at a 300 MW coal-fired power station showed that selective catalytic reduction (SCR) can effectively reduce mercury content in flue gas. Commercial testing demonstrated that SCR catalyst breakage resulted in an increase in total mercury concentration at the electrostatic precipitator (ESP) inlet and outlet. Laboratory experiments confirmed the Hg0 oxidation capability of the commercial SCR catalyst.
APPLIED CATALYSIS A-GENERAL
(2023)
Review
Energy & Fuels
Dunyu Liu, Chaoran Wang, Yunpei Fan, Qiuqi Liu, Xudong Wang, Kailong Xu, Jing Jin, Jingjing Ma, Jinchen Ma
Summary: Chemical looping combustion (CLC) of coal for carbon capture utilization and storage is an effective technology to reduce carbon emission. However, there is uncertainty in mercury emission from both air and fuel reactor. This paper aims to reveal the mechanisms for the transformation of mercury-related species.
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
Energy & Fuels
Wenjun Huang, Chenxi Zong, Zhisong Liu, Qinyuan Hong, Leipeng Ji, Haomiao Xu, Zan Qu, Naiqiang Yan
Summary: This paper investigates the removal of gaseous elemental mercury (Hg0) from industrial flue gas using Mn-based oxides modified SAPO-34 molecular sieve. The results show that deposition of 5% Mn on the surface of SAPO-34 enhances Hg0 removal efficiency, especially at lower temperatures. The surface MnOx particles enhance the oxidation of Hg0 and facilitate its adsorption.
Review
Energy & Fuels
Mei An, Qingjie Guo, Xianyong Wei
Summary: The reaction mechanism of H2S and Hg0 on CuFe2O4 with oxygen vacancy structure was investigated using X-ray photoelectron spectroscopy (XPS) characterization and Density Functional Theory (DFT) calculations. The results showed that oxygen vacancies enhanced the adsorption capacity of CuFe2O4 towards Hg, H2S, and HgS, and improved the energy barrier and thermodynamic stability of key intermediates.
Article
Energy & Fuels
Rihong Xiao, Tian Gao, Xiangzheng Cui, Yushan Ji, Yili Zhang, Xing Chuai, Zhuo Xiong, Yongjin Liao, Hongbai Gu, Jianping Yang, Junying Zhang, Yongchun Zhao
Summary: CuCl2-MF is a cost-efficient and highly efficient sorbent for Hg removal from flue gas in coal-fired units, exhibiting high removal efficiency and recovery rate in large-scale coal-fired power plants. The optimal magnetosphere particle size of 45 μm-75 μm showed the highest mercury removal capacity, while CuCl2-MF also demonstrated good removal efficiency for low concentrations of mercury.
Article
Engineering, Environmental
Wei-Hsin Chen, Kuan-Hsiang Chen, Aristotle T. Ubando, Wen-Jhy Lee, Man -Hin Chio
Summary: Chemical looping combustion (CLC) using iron-based oxygen carriers can efficiently capture carbon dioxide and produce high yields of CO2 and H2O under specific operating conditions. Fe3O4 and Fe2O3 are the major components of iron in OCs during most reduction and oxidation reactions. Decreasing oxygen input leads to increased carbon formation in the system.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Barnali Bhui, Banabir Das, V Prabu
Summary: Electronic waste poses a serious threat to the environment, but the metals and polymers in PCB boards can be used as potential oxygen carriers in the chemical looping combustion process. Experimental studies demonstrate the feasibility of utilizing PCB based oxygen carriers in CLC for environmental sustainability.
Article
Energy & Fuels
Yanan Wang, Hengfeng Bu, Haibo Zhao, Kunlei Liu
Summary: Solid fuel chemical looping gasification technology requires the development of low-cost, easily available oxygen carrier particles, with Cu/Fe-based OCs from waste ore particles and bauxite residues showing promise for coal gasification. Among these OCs, red mud and Cu20Fe80@C exhibit better gasification performance and potential for Fischer-Tropsch synthesis and H-2-rich chemical synthesis. The study also reveals the importance of lattice oxygen donation capacity and alkali metal content in determining coal and char gasification rates.
Article
Chemistry, Applied
Yunchang Dong, Yanan Wang, Jinchen Ma, Hengfeng Bu, Chuanbao Zheng, Haibo Zhao
Summary: In this study, composite oxygen carriers were prepared using extrusion-spheronization method with fine iron and copper ores as raw materials and inert aluminosilicates as binders. After optimization, the oxygen carriers showed good performance in terms of reactivity and stability, indicating the suitability of the method for large-scale preparation of oxygen carrier particles.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Fangjun Wang, Yanfeng Zhao, Meilin Zhang, Jiang Wu, Guolong Liu, Ping He, Yongfeng Qi, Xiaokun Li, Yuzhuo Zhou, Jiachen Li
Summary: A new type of bimetallic sulfide ZnIn2S4 modified g-C3N4 adsorbent has been prepared for capturing Hg-0 from coal-fired flue gas, showing stable adsorption efficiency and high capacity. The adsorbent is promising for mercury pollution remediation and may guide future development of similar materials for industrial flue gas treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Zhuang Liu, Dunyu Liu, Jing Jin, Liang Feng, Mingguo Ni, Bingtao Zhao, Xiaojiang Wu
Summary: This study demonstrated the effectiveness of HICCA in removing Hg-0 in iG-CLC and revealed the mechanisms of interaction between HCl/SO2/NO and MxOy/CaSO4 as well as carbon-oxygen groups.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Chemical
Rushikesh Joshi, Yaswanth Pottimurthy, Vedant Shah, Pinak Mohapatra, Sonu Kumar, Omari Jones, Marianna Beard, Ibiada Harry, Albany Hornbuckle, Mandar Kathe, Liang-Shih Fan
Summary: The CDCL-SR process proposed in this study utilizes a multimetal oxide as the oxygen carrier to combust coal and capture sulfur in situ, resulting in high thermal and exergy efficiencies. The process eliminates the need for downstream processing units by producing separate streams of CO2 and SO2 during combustion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)