Article
Engineering, Environmental
Qianqian Zhang, Anchao Zhang, Hao Li, Xinmin Zhang, Zhijun Sun, Yanyang Mei, Jun Xiang, Sheng Su, Zengqiang Tan, Hao Lu
Summary: The feasibility of removing elemental mercury (Hg-0) from simulated flue gas using an electrocatalytic peroxydisulfate (PDS) system with FeNi3 foam as cathode catalyst was studied. The results showed that the FeNi3 foam/PDS/EC system was superior to other removal processes, with about 94% of Hg-0 removed within 20 minutes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Xiangwen Xing, Xiaoyang Zhang, Jiyun Tang, Lin Cui, Yong Dong
Summary: Fe2O3/TiO2 sorbents synthesized by the sol-gel method exhibited excellent mercury capture efficiency in simulated syngas, with sensitivity to H2S and reusability.
Article
Engineering, Environmental
Junyuan Li, Kaisong Xiang, Cao Liu, Shudan He, Fenghua Shen, Hui Liu
Summary: Metal sulfides are promising sorbents for removing H-g(0) from flue gas, but they require regeneration. This study developed a CoS2 loaded porous carbon for H-g(0) capture and investigated the regeneration using elemental sulfur. Elemental sulfur effectively recovered the H-g(0) capture ability of the sorbent and showed similar regeneration stability compared to toxic H2S. The regenerated sorbent had higher S-2(2-) sites but less Co3+ and S-n(2-) (n >2) sites compared to the fresh sample.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Sinang Choi, Sang-Sup Lee
Summary: Activated carbon injection upstream of a particulate matter control device is commonly used to control mercury in coal-fired flue gas. Nitrogen oxides and hydrogen chloride can enhance the efficiency of activated carbon for mercury removal. Among different chloride compounds impregnated on activated carbon, copper chloride impregnated activated carbon showed the highest mercury adsorption efficiency under specific conditions.
Article
Green & Sustainable Science & Technology
Vanish Kumar, Sherif A. Younis, Jan E. Szulejko, Ki-Hyun Kim
Summary: This study evaluates the photocatalytic removal potential of BiOI photocatalysts in their pristine and composite forms against gaseous Hg-0. The results show promising performance in certain performance metrics, but there are still challenges and limitations to be addressed.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(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
Chemistry, Physical
Chaoen Li, Jiang Wu, Dongjing Liu
Summary: SnO2 doped cobalt pyrite (CoS2/SnO2) adsorbent is prepared and used for Hg0 capture in simulated flue gas. Bare CoS2 and SnO2 have lower Hg0 adsorption ability. SnO2 addition enhances the Hg0 capture ability of CoS2 due to the synergetic effect. NO and SO2 negatively affect Hg0 capture processes due to competitive adsorption or side reaction. Co2+, S22-, and Sn4+ ions serve as the major adsorption sites for elemental mercury capture over CoS2/SnO2. Chemisorbed oxygen may participate in the mercury removal process.
Article
Engineering, Environmental
Yixuan Xiao, Yaji Huang, Haoqiang Cheng, Jiang Wu, Baosheng Jin
Summary: In this study, CuS/CeO2 composite sorbent was synthesized and showed excellent performance in removing elemental mercury from coal-fired flue gas. The mechanism behind its high adsorption capacity was analyzed and verified. This work provides new approaches for the development of heavy metal sorbents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Yuying Wei, Xiaopeng Zhang, Cheng Gao, Xinxin Wang, Ning Zhang, Junjiang Bao, Gaohong He
Summary: The organic-inorganic hybrid nanowires prepared by hydrothermal method can be used to prepare mesoporous Co3O4 nanotube sorbents, which have a well-defined tubular structure, abundant active sites, and high redox property, effectively removing Hg0 from flue gas.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Limei Cao, Jie Yang, Yi Xu, Wei Sun, Qicheng Shen, Jiacheng Zhou, Ji Yang
Summary: The introduction of UV in the electric catalytic system improved the efficiency of Hg-0 removal in flue gas. The combined electro-chemical and advanced oxidation technologies show promise in gaseous elemental mercury removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
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.
Article
Engineering, Environmental
Xingyu Pang, Wei Liu, Haomiao Xu, Qinyuan Hong, Peng Cui, Wenjun Huang, Zan Qu, Naiqiang Yan
Summary: The use of ZnO-CuS composite materials has proven effective in capturing gaseous SO3 and Hg-0, especially at high temperatures with high feasibility and performance. Additionally, ZnO and CuS demonstrate unique advantages in the adsorption of SO3 and Hg-0, making gaseous mercury easier to capture.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Pengcheng Zhao, Jian Guan, Qianyan Liu, Jiang Wu, Yang Ling, Ping He, Hong Yao, Guangqian Luo, Jiandong Hong, Xialin Xie
Summary: The study prepared microscopic spherical alpha-Fe2O3 sorbent by one-step hydrothermal method for effective arsenic capture in coal-fired flue gas. Factors such as reaction temperature, sulfur dioxide, nitric oxide, oxygen, and arsenic concentration were investigated for their adsorption performance effects. The sorbent showed promising arsenic removal performance and sulfur dioxide resistance, making it a potential material for arsenic removal.
Article
Engineering, Chemical
Xiaopeng Zhang, Yuying Wei, Lianhao Zhang, Xinxin Wang, Ning Zhang, Junjiang Bao, Gaohong He
Summary: Adsorption is an efficient method for removing Hg0 from coal flue gas. In this study, Co3O4 nanotubes were embedded into GO nanosheets to prepare a composite material with good dispersion. The GO-Co3O4-1-2 sorbent showed the best O beta/OT ratio and redox capacity, providing more active sites for O2 capture and activation. The Hg0 removal efficiency of GO-Co3O4-1-2 reached 94.67% with good stability.
SEPARATION AND PURIFICATION TECHNOLOGY
(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
Environmental Sciences
Lei Yi, Jinke Xie, Caiting Li, Jian Shan, Yingyun Liu, Junwen Lv, Mi Li, Lei Gao
Summary: A battery of LaOx modified MnOx activated carbon catalysts were prepared for simultaneous abatement of NO and Hg-0, with 15%LaMn/BAC exhibiting excellent removal efficiency at 180 degrees C. The inhibitory effect of NH3 on Hg-0 removal was found to be greater than the accelerative effect of NO and O-2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Lingkui Zhao, Lu Jiang, Yan Huang, Junfeng Zhang, Jun Tang, Caiting Li
Summary: The study demonstrated that partial substitution of La with Co in LaFeO3 can induce structural distortion, promote specific surface area, enhance active site exposure, and produce more reactive oxygen species, leading to significantly improved catalytic activities. Additionally, NO and toluene have mutual promotion effects in the reaction system, while the presence of H2O inhibits the oxidation of NO and toluene by consuming active oxygen atoms.
APPLIED SURFACE SCIENCE
(2022)
Review
Environmental Sciences
Ya Zhu, Yunbo Zhai, Shanhong Li, Xiangmin Liu, Bei Wang, Xiaoping Liu, Yuwei Fan, Haoran Shi, Caiting Li, Yun Zhu
Summary: This paper reviews methods for recovering different forms of phosphorus from solid products obtained from different sludge thermal treatment methods, as well as the bioavailability of the recovered phosphorus products. Incineration of sewage sludge is currently the most established and effective method for recovering phosphorus, while one wet chemical method has been commercialized and is expected to be further developed for industrial applications in the future. Pyrolysis and hydrothermal carbonization still have research gaps, but both have the potential to recover phosphorus and should be further explored based on their principles and laboratory performance.
Article
Energy & Fuels
Lei Gao, Lei Yi, Jiajie Wang, Xiangyi Li, Zhi Feng, Jian Shan, Yingyun Liu, Wenfa Tan, Qiuhua He, Caiting Li
Summary: This study presents a facile strategy for designing novel carbon-based catalysts for efficient removal of HCHO, combining hierarchical porous carriers and promotional effects to enhance catalytic performance.
Article
Chemistry, Physical
Caixia Liang, Caiting Li, Youcai Zhu, Xueyu Du, Yifu Zeng, Yihui Zhou, Jungang Zhao, Shanhong Li, Xuan Liu, Qi Yu, Yunbo Zhai
Summary: This study investigated the removal of toluene pollution using CuO/TiO2 composites. The composites synthesized by the wet precipitation method showed better performance and durability, with higher light absorption and lower charge recombination. Under ultraviolet-visible light, the light-driven heat significantly increased the removal efficiency, and the addition of infrared light further improved the efficiency. The reduction of carbon deposition greatly improved the photocatalytic performance and stability of the materials.
APPLIED SURFACE SCIENCE
(2022)
Review
Chemistry, Inorganic & Nuclear
Qi Yu, Caiting Li, Dengsheng Ma, Jungang Zhao, Xuan Liu, Caixia Liang, Youcai Zhu, Ziang Zhang, Kuang Yang
Summary: This paper reviews the recent advances of layered double hydroxides (LDHs)-based materials for the abatement of volatile organic compounds (VOCs), mainly focusing on photocatalytic oxidation and thermal catalytic oxidation. The catalytic performance and intensified mechanisms of various LDHs-based materials are summarized and compared, with a focus on the mechanistic details that lead to varying results. The effect of different gas components on the performance of LDHs-based materials is examined, and the applications of LDHs-based materials for VOCs adsorption, sensing, and steam reforming are discussed. Finally, the current challenges and development strategies for practical applications are outlined.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Thermodynamics
Xiangmin Liu, Yuwei Fan, Yunbo Zhai, Xiaoping Liu, Zhexian Wang, Ya Zhu, Haoran Shi, Caiting Li, Yun Zhu
Summary: This study conducted co-hydrothermal carbonization of rape straw and microalgae to obtain clean hydrochar. The effect of different feedwater pH values on co-HTC and the mechanism of enhanced N, S, and O removal were revealed. Acidic and alkaline conditions in the feedwater exacerbated the carbonization process. The hydrochar formed under acidic conditions had a higher heating value and deamination and deoxidation were the main methods for protein degradation and N, S, and O removal. The results provide insights into the production of hydrochar with improved properties.
Article
Energy & Fuels
Jie Zhang, Caiting Li, Xueyu Du, Shanhong Li, Le Huang
Summary: Recycled desulfurized activated coke can effectively recover Hg0 from coal-fired flue gas with superior removal performance. The generation of surface active oxygen species on activated coke after thermal treatment can enhance the adsorption of Hg0. The deposition of SO42-, oxygen addition, and specific surface area play important roles in the removal of Hg0 by activated coke during regeneration.
Review
Chemistry, Multidisciplinary
Jungang Zhao, Caiting Li, Xueyu Du, Youcai Zhu, Shanhong Li, Xuan Liu, Caixia Liang, Qi Yu, Le Huang, Kuang Yang
Summary: Rapid industrialization has caused serious air pollution problems, highlighting the need for the development of detection and treatment technologies for efficient removal of harmful pollutants. Functional nanomaterials, specifically carbon dots (CDs), show great potential in sensing and photocatalytic technologies. CDs offer superior properties such as controllable structures, easy surface modification, adjustable energy band, and excellent electron-transfer capacities, making them an environmentally friendly and sustainable option for addressing environmental issues. This article highlights recent advances in CDs-based sensors and photocatalysts, discussing their applications in air pollutants detection and photocatalytic removal, as well as the diverse sensing and photocatalytic mechanisms of CDs. It emphasizes the importance of investigating synthetic mechanisms and designing structures.
Article
Chemistry, Multidisciplinary
Xiaoping Liu, Yunbo Zhai, Yun Zhu, Zhixiang Xu, Liming Liu, Wanying Ren, Yu Xie, Caiting Li, Min Xu
Summary: By using natural deep eutectic solvents (NADESs) and low-temperature pretreatment, the dewaterability and resource recovery of waste-activated sludge (WAS) can be significantly improved.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Review
Engineering, Environmental
Ziang Zhang, Caiting Li, Xueyu Du, Youcai Zhu, Le Huang, Kuang Yang, Jungang Zhao, Caixia Liang, Qi Yu, Shanghong Li, Xuan Liu, Yunbo Zhai
Summary: The synergistic system of non-intense electric field incorporated in semiconductor catalysts has gained attention as an advanced method to enhance cryogenic catalytic activity and meet specific reaction requirements. However, the lack of a comprehensive review on the process and mechanism in this research field is addressed in this study. A critical discussion on the classification of exogenous electric field promoting catalysis is provided, along with the construction of a shared mechanism framework. Further research suggestions are also proposed to contribute to the development and commercialization of this technology.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xueyu Du, Caiting Li, Jie Zhang, Youcai Zhu, Caixia Liang, Le Huang, Kuang Yang, Chaoliang Yao, Ying Ma
Summary: In this paper, the authors investigated the removal of Hg-0 using modified AC samples with abundant active oxygen species (AOS). The results showed that the treatment with (NH4)2S2O8 increased the microporosity and oxygen-containing functional groups, providing more anchoring sites for the dispersion of MnOx-FeOx. The optimized MnFe/NAC exhibited excellent efficiency for Hg-0 removal, as well as simultaneous removal of Hg-0 and NO.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Jungang Zhao, Caiting Li, Qi Yu, Youcai Zhu, Xuan Liu, Shanhong Li, Caixia Liang, Ying Zhang, Le Huang, Kuang Yang, Ziang Zhang, Yunbo Zhai
Summary: Mn3O4/Co3O4 composites with S-scheme heterojunctions were fabricated for photothermal catalytic degradation of toluene under UV-Vis light irradiation. The hetero-interface of Mn3O4/Co3O4 effectively increases the specific surface area and promotes the generation of reactive oxygen species. The presence of a built-in electric field and energy band bending optimizes the photogenerated carriers' transfer path and enhances the removal efficiency of toluene.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Youcai Zhu, Caiting Li, Xuan Liu, Ying Zhang, Kuang Yang, Le Huang, Jungang Zhao, Ziang Zhang
Summary: CoCeOx nanoparticles with different Co/Ce molar ratios were prepared and applied to toluene oxidation. The Co-doped CeO2 improved the catalytic activity through interfacial synergistic effects. CoCeOx-2-NP exhibited the highest toluene conversion activity and CO2 selectivity. Various characterizations were performed to analyze the relationship between the catalysts' structure and performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Environmental
Xiangmin Liu, Yunbo Zhai, Shanhong Li, Qiuya Niu, Xiaoping Liu, Zhexian Wang, Yali Liu, Zhenzi Qiu, Caiting Li, Yun Zhu, Min Xu
Summary: This study investigates the properties and conversion processes of petrochemical sludge under different hydrothermal carbonization temperatures. The results show that higher temperatures lead to higher organic-dissolved oil content and lower water-soluble oil content. Carbon is mainly preserved in hydrochar and organic-dissolved oil, while nitrogen and sulfur are removed through migration into water-soluble oil.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
