Article
Engineering, Environmental
Yang Xu, Guangqian Luo, Qingzhu Zhang, Wei Cui, Zehua Li, Shibo Zhang
Summary: Novel waste-derived sorbents synthesized through one-step co-pyrolysis of wood and PVC have shown good stability in Hg and halogens removal, with Fe doping further enhancing the stability. Kinetic analysis revealed different rate-limiting steps before and after Fe doping, and water-washing pretreatment can remove loosely-bonded halogens while retaining essential halogens for Hg removal.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Lin Chang, Yongchun Zhao, Yi Zhang, Xuehai Yu, Zenghua Li, Bengen Gong, Huan Liu, Shuzhou Wei, Hao Wu, Junying Zhang
Summary: This study investigated the occurrence, partitioning, and leaching risks of mercury in WFGD sludge. The results showed that residual mercury in the sludge was mainly related to HgS, with a potentially high leaching risk.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Daiwei Ouyang, Kaiyun Liu, Qingru Wu, Shuxiao Wang, Yi Tang, Zhijian Li, Tonghao Liu, Licong Han, Yuying Cui, Guoliang Li, Deming Han
Summary: Coal preparation effectively reduces primary mercury emissions by altering mercury flows, but secondary emissions may occur during the combustion of byproducts. Uncertainty in evaluating the impact of coal preparation in China stems from inconsistent statistics, unclear mercury distribution characteristics, and limited information on byproduct utilization pathways.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Energy & Fuels
Jianping Yang, Qin Li, Wenbing Zhu, Wenqi Qu, Min Li, Zhengyong Xu, Zequn Yang, Hui Liu, Hailong Li
Summary: This study utilized the abundant mineral chalcopyrite as an efficient trap for Hg-0 sequestration, showing excellent removal performance in a wide temperature range and minimal interference from typical flue gas components. The adsorption capacity and rate of CuFeS2 were significantly higher than commercial activated carbons, attributed to the oxidizing and immobilizing abilities of disulfide ligands, and the sorbent could be regenerated through thermal decomposition, saving operation costs. CuFeS2 is identified as a potential, cost-effective trap for efficient remediation of Hg-0 from coal combustion flue gas.
Article
Environmental Sciences
Hao Liu, Yajun Wang, Juan Chen
Summary: Combustion experiments were conducted to investigate the transformation of Zn and Cr in sewage sludge (SS) blended with low-rank coal. The results showed that the retention rates of Zn and Cr in ash increased with the blending of coal, and the greater the proportion of low-rank coal, the higher the residual rate of heavy metals in the ash.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Teh Sabariah Binti Abd Manan, Salmia Beddu, Daud Mohamad, Nur Liyana Mohd Kamal, Wan Hanna Melini Wan Mohtar, Taimur Khan, Hisyam Jusoh, Ariyanti Sarwono, Mustafa M. Ali, Zakaria Che Muda, Fadzli Mohamed Nazri, Mohamed Hasnain Isa, Abdulnoor A. J. Ghanim, Amirrudin Ahmad, Nadiah Wan Rasdi, Nur Amalina Nadiah Basri
Summary: This research examined the physicochemical and leaching properties of coal ashes from a Malaysian power plant, finding that the leaching properties of heavy metals complied with standard guidelines. Further investigation on the leaching properties for construction industry applications is recommended.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Energy & Fuels
Faustyna Wieronska-Wisnewska, Dorota Makowska, Andrzej Strugala
Summary: The research presented in the paper focused on determining the content and mode of arsenic occurrence in Polish commercial coal, finding that arsenic in coal is mainly associated with mineral matter. The study also showed that the amount of arsenic passing to gas during combustion is influenced by the parameters of the combustion process and the chemical composition of the coals. Statistical analysis indicated that the presence of arsenic in coal, mainly in association with disulphides, carbonates, and sulphates, significantly influences the amount of Asgas in the flue gas.
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
Engineering, Environmental
Lucie Bartonova, Helena Raclavska, Jan Najser
Summary: This paper evaluates the important aspects of V in coal and its behavior during combustion, with a focus on its extraction from ash and slag waste. It also evaluates the co-combustion of coal and waste fuels and their corresponding ash and slag counterparts. The paper summarizes V levels in coal and other materials, discusses V speciation in ash and slag residues, and compares theoretical predictions with experimental results. It also discusses oxy-fuel combustion conditions and separation methods for extracting V from ash and slag residues. The paper concludes with remarks on promising trends and limitations for future research.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Zifeng Luo, Ling You, Jiang Wu, Yubao Song, Siyuan Ren, Tao Jia, Xiaokun Li, Liping Chen, Yongfeng Qi, Ping He
Summary: This study introduces the method of introducing selenium ligands into ZnS to enhance Hg0 capture capability, with promising results showing 100% removal efficiency within a wide temperature range for 30SZ. The sorbent demonstrated excellent absorbent capability and minimal effects from O2 and SO2, with slight competition from NO for Hg0 adsorption.
CHEMICAL ENGINEERING JOURNAL
(2021)
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
Engineering, Environmental
Feng Xin, Rihong Xiao, Yongchun Zhao, Junying Zhang
Summary: This research proposes a method to reduce elemental mercury emission from coal-fired power plants by modifying magnetospheres with H2S as a sorbent. The modified magnetospheres show high affinity towards Hg-0 and can achieve over 80% adsorption efficiency. The technology has low cost, high recyclability, and minimal impact on environmental mercury pollution.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Jianping Yang, Yuanyuan Na, Yingchao Hu, Penglin Zhu, Fanyue Meng, Qingjie Guo, Zequn Yang, Wenqi Qu, Hailong Li
Summary: Circulating adsorbents integrating elemental mercury adsorption and oxidized mercury decomposition/desorption processes were used for simultaneous adsorbent recycling and mercury recovery. The formation of granulated adsorbent pellets reduced elutriation in the system. La0.8Ce0.2MnO3 perovskite adsorbent was molded into pellets using an extrusion-spheronization method with microcrystalline cellulose (MC) as a pore-creating template. The pellets showed excellent Hg0 removal efficiency and durability in a wide temperature range, with slight interference from SO2 and H2O and enhancement from O2 and NO. The presence of pore channels in the pellets allowed for efficient Hg0 diffusion and in-situ retention during high-temperature burning.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Huan Liu, Yu Chen, Tian Gao, Gangzhong Yang, Yi Wang, Yuming Zhou, Jianping Yang, Yongchun Zhao, Xin Guo, Junying Zhang
Summary: The study found that the use of MTCS in coal-fired power plants is beneficial for Hg-0 removal, especially in WFGD devices. Controlling factors such as injection rate, particle size, and residence time can enhance mercury removal efficiency, and MTCS is a low-cost suitable option for mercury control in coal-fired power plants.
JOURNAL OF CLEANER PRODUCTION
(2021)
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)
Article
Energy & Fuels
Hailong Li, Wenbing Zhu, Jianping Yang, Mingguang Zhang, Jiexia Zhao, Wenqi Qu
Article
Energy & Fuels
Jianping Yang, Yongchun Zhao, Xin Guo, Hailong Li, Junying Zhang, Chuguang Zheng
Article
Energy & Fuels
Zequn Yang, Hailong Li, Xi Liu, Pu Li, Jianping Yang, Po-Heng Lee, Kaimin Shih
Article
Engineering, Environmental
Jianping Yang, Wenbing Zhu, Shibo Zhang, Mingguang Zhang, Wenqi Qu, Hailong Li, Zhiyong Zeng, Yongchun Zhao, Junying Zhang
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Energy & Fuels
Yingchao Hu, Mingyu Qu, Hailong Li, Yuandong Yang, Jianping Yang, Wenqi Qu, Wenqiang Liu
Article
Energy & Fuels
Hailong Li, Suojiang Liu, Jianping Yang, Yue Liu, Yingchao Hu, Shihao Feng, Zequn Yang, Jiexia Zhao, Wenqi Qu
Article
Engineering, Environmental
Hailong Li, Hongxiao Zu, Qin Li, Jianping Yang, Wenqi Qu, Zequn Yang
Summary: Metal selenides have shown promise as Hg-0 remediators, but their inadequate adsorption rate has limited their feasibility. This study introduced a novel strategy to enhance the adsorption rate by adjusting the selenide saturation. Copper iron diselenide was used as a concentrator of unsaturated selenides, showing significantly higher adsorption rates compared to previous metal selenides. CuFeSe2 exhibited excellent resistance and applicability in real-world conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Energy & Fuels
Hailong Li, Hongxiao Zu, Yaoting Deng, Weizhen He, Zequn Yang, Jianping Yang, Shilin Zhao, Wenqi Qu
Summary: This review systematically summarizes the immobilization mechanism of mercury atom on metal sulfides and the roles of surface active sites in Hg-0 adsorption. The improvement of metal sulfides' adsorption ability and the effects of flue gas components on mineral sulfides are also discussed.
Article
Energy & Fuels
Hailong Li, Yaoting Deng, Jianping Yang, Zequn Yang, Hongxiao Zu, Weizhen He, Wenqi Qu
Summary: The presence of defects on the surface of pyrite significantly enhances the adsorption of elemental mercury (Hg0). These defects facilitate Hg0 adsorption and induce the dissociation of HCl, allowing for Hg0 oxidation. The study provides valuable insights for the design and modification of natural mineral sulfide sorbents.
Article
Chemistry, Multidisciplinary
Jiaoqin Zheng, Zequn Yang, Hongxiao Zu, Wei Zheng, Lijian Leng, Jianping Yang, Yong Feng, Wenqi Qu, Hailong Li
Summary: This study developed an in situ acid-etching method that self-regulated the water affinity of metal sulfides (MSs) and improved their adsorption selectivity and water resistance. The introduction of undercoordinated sulfur increased the hydrophobicity of MSs and allowed for efficient removal of elemental mercury from industrial flue gas.