Article
Environmental Sciences
Chang Yuan, Siqian Su, Ruiguang Xu, Shengwen Liang, Hairong Cheng, Zhibing Yao, Luxiang Jiang, Zuwu Wang
Summary: This study investigated the effect of wet flue gas desulfurization (WFGD) on condensable particulate matter (CPM) in ultralow emission coal-fired power plants in Hunan province, China. The removal efficiencies of different components vary, with inorganic components being more efficiently removed compared to organic components.
ATMOSPHERIC POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
Yujia Wu, Zhenyao Xu, Xinlei Huang, Siqi Liu, Minghui Tang, Shengyong Lu
Summary: This study samples and examines PAHs and CPM from a 300 MW ultralow emission coal-fired power plant, and finds that air pollution control devices have different removal effects on PAHs with different phases and ring numbers. By replacing the fuel and using absorbent injection combined with electrostatic precipitator, the emission concentration of PAHs can be effectively reduced.
Article
Engineering, Chemical
Jiangyuan Qu, Nana Qi, Kai Zhang, Lifeng Li, Pengcheng Wang
Summary: This study investigates the desulfurization performance of a wet flue gas desulfurization unit based on spray scrubber using CFD method in an Eulerian-Lagrangian framework. The research reveals that the uniformity of flue gas in the scrubber is largely determined by the force-balanced droplets in the middle part of the scrubber. The momentum transfer behavior and SO2 chemical absorption process exhibit synchronicity with the evolution of gas-slurry flow pattern, while heat transfer has little effect on the overall absorption process.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Francesco Di Natale, Claudia Carotenuto, Arianna Parisi, Domenico Flagiello, Amedeo Lancia
Summary: This study presents experimental and modeling results on the removal of SO2 and combustion particles in a pilot-scale wet electrostatic scrubber. The experiments showed that increasing the spray charge density improved the absorption efficiency of SO2, and further enhancement was achieved with corona pre-charging. Similarly, increasing the spray charge density and corona pre-charging potential improved the overall particle capture efficiency. The results accurately described the absorption of SO2 in certain configurations and the particle capture in another configuration, but further research is needed for other conditions.
Article
Energy & Fuels
John H. Jacobs, Nancy Chou, Kevin L. Lesage, Ye Xiao, Josephine M. Hill, Robert A. Marriott
Summary: Activated carbons have been found to possess good selective adsorption capability for removing sulfur dioxide from flue gas, especially in the presence of water. The activated carbons prepared with KOH and NaOH showcased the highest SO2 adsorption capacity under wet conditions. Additionally, the adsorption performance of all activated carbons remained unchanged after multicomponent adsorption of wet SO2.
Article
Energy & Fuels
Lin Cui, Jingwen Lu, Xiangda Song, Lishu Tang, Yuzhong Li, Yong Dong
Summary: Limestone-gypsum wet flue gas desulfurization (WFGD) is the most effective desulfurization technique. By coupling WFGD with condensation desulfurization using a condensing heat exchanger (CHE), significant energy savings can be achieved while improving desulfurization efficiency.
Article
Thermodynamics
Yongjing Tong, Liqiang Duan, Liping Pang
Summary: A new 300 MW S-CO2 coal-fired boiler heating surface arrangement is proposed to solve existing problems under part load conditions. The performance analysis model shows variations in reheated working fluid temperature, working fluid pressure drop, and boiler efficiency with changes in coal type, excess air coefficient, and operating load. Results indicate efficiency is greatly influenced by coal type and excess air coefficient, with the optimal efficiency zone reached at 1.2-1.4 excess air coefficient and a load range of 70%-100% of the design load.
Article
Microbiology
Gregory Martin, Shagun Sharma, William Ryan, Nanda K. Srinivasan, John M. Senko
Summary: The microbial communities in wet flue gas desulfurization systems of coal-fired power plants can adapt to extreme physicochemical conditions, with active organisms metabolizing at high temperatures. Metatranscriptomic analysis revealed the presence of active microbial taxa associated with carbohydrate metabolism, osmotic stress response, and genetic elements in the wet flue gas desulfurization system. These microbial activities may have implications for the performance and environmental impacts of thermoelectric power plants.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Engineering, Chemical
Lu Duan, Qian Huang, Renshan Ji, Shuiqing Li
Summary: In this paper, a comprehensive predictive model is developed for the synergetic removal of fine particulate matter (PM) and SO3 in the ultralow cold-side electrostatic precipitator (ESP). The model is validated against measurements from two coal-fired units, showing effective removal of PM and SO3 by running the low temperature economizer. The most important factor in the ultralow cold-side ESP is the flow residence time in the ESP, followed by the effects of intensified coagulation and elevated ash permittivity.
JOURNAL OF AEROSOL SCIENCE
(2022)
Article
Engineering, Environmental
Hengfei Zou, Jingqi Yuan
Summary: A dynamic model for the flue gas desulfurization tower in coal-fired power plants is proposed and validated. The model takes into account the movement and size of slurry droplets, temperature and flow rate of flue gas, and chemical reactions. Several critical parameters that affect the model accuracy are identified and periodic identification in real applications is recommended. The model can simulate the desulfurization process across the entire load range and predict the desulfurization efficiency online, offering potential for operational optimization.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Green & Sustainable Science & Technology
Jonghun Lim, Hyungtae Cho, Junghwan Kim
Summary: By optimizing the wet flue gas desulfurization system using recycled waste oyster shells as substitutes for high-grade limestone, efficiency can be improved, costs reduced, and reliance on limited resources decreased. Waste oyster shells can serve as excellent substitutes for high-quality limestone, offering significant environmental and economic benefits.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Siqi Liu, Yujia Wu, Zhenyao Xu, Shengyong Lu, Xiaodong Li
Summary: The study found that wet flue gas desulfurization in coal-fired power plants has a significant impact on the particle size, concentration, and chemical composition of particulate matter, with a high removal efficiency of inorganic components in CPM. CPM contains various organic compounds, with esters being an important component that tends to decrease in concentration after wet flue gas desulfurization. Additionally, fatty acid methyl esters account for a higher contribution to the concentration of particulate matter in CPM compared to phthalate esters, while wet flue gas desulfurization has a stronger control effect on the removal of phthalates.
Article
Materials Science, Multidisciplinary
Yingying Han, Lichun Xiao, Hongrui Chen
Summary: Wet electrostatic precipitators (WESPs) are widely used in iron and steel plants and coal-fired power plants for their high efficiency in capturing fine particles. This study proposes an improved method by adding a chemical coagulant and a surfactant to enhance the dust removal efficiency of WESPs. The results show that the addition of a chemical coagulant and surfactant promotes the agglomeration of dust particles and improves the dust capture effect of WESPs. Further studies will be conducted to investigate the multi-factor synergistic coupling effect on the chemical coagulation method in WESPs.
Article
Energy & Fuels
Xiaoyu Chen, Pengxiang Sun, Lin Cui, Wenbo Xu, Yong Dong
Summary: Oxygen-enriched combustion is a promising technology for reducing CO2 emissions from coal burning. However, it leads to increased concentrations of CO2 and SO2 in the flue gas, posing a challenge for subsequent wet flue gas desulfurization (WFGD). In this study, limestone-based dual-loop WFGD technology was used to address this issue. The results show that dual-loop WFGD is more suitable for desulfurization after oxygen-enriched combustion compared to single-loop WFGD.
Review
Engineering, Environmental
Che-Jung Hsu, John D. Atkinson, Adrienne Chung, Hsing-Cheng Hsi
Summary: Studies have shown that Hg-0 re-emission is influenced by various factors and can be restricted through the addition of inhibitors. This review summarizes the mechanisms of Hg-0 re-emission, updates misconceptions, and reviews the application of inhibitors.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Bobo Wu, Hezhong Tian, Yan Hao, Shuhan Liu, Yujiao Sun, Xiaoxuan Bai, Wei Liu, Shumin Lin, Chuanyong Zhu, Jiming Hao, Lining Luo, Shuang Zhao, Zhihui Guo
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Chuanyong Zhu, Hezhong Tian, Jiming Hao
ATMOSPHERIC ENVIRONMENT
(2020)
Article
Environmental Sciences
Yiming Wu, Shumin Lin, Hezhong Tian, Kai Zhang, Yifei Wang, Bowen Sun, Xiangyang Liu, Kaiyun Liu, Yifeng Xue, Jiming Hao, Huanjia Liu, Shuhan Liu, Panyang Shao, Lining Luo, Xiaoxuan Bai, Wei Liu, Bobo Wu, Shuang Zhao
ENVIRONMENTAL POLLUTION
(2020)
Article
Environmental Sciences
Bobo Wu, Xiaoxuan Bai, Wei Liu, Chuanyong Zhu, Yan Hao, Shumin Lin, Shuhan Liu, Lining Luo, Xiangyang Liu, Shuang Zhao, Jiming Hao, Hezhong Tian
ENVIRONMENTAL POLLUTION
(2020)
Article
Environmental Sciences
Lining Luo, Hezhong Tian, Huanjia Liu, Xiaoxuan Bai, Wei Liu, Shuhan Liu, Bobo Wu, Shumin Lin, Shuang Zhao, Yan Hao, Yujiao Sun, Jiming Hao, Kai Zhang
Summary: This study investigates the seasonal measurements of organic carbon (OC) and elemental carbon (EC) in PM2.5 during autumn and winter in six selected cities in China. The results show that carbonaceous constituents have various adverse impacts on human health, visibility, and climate change, and highlight the need to strengthen pollution control in certain border zones in North China.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Ke Cheng, Jiayu Zhang, Peng Yi, Guifen Zhu, Weiwei Hao, Wanwan Ji, Hezhong Tian, Yan Wang
Article
Environmental Sciences
Shuang Zhao, Hezhong Tian, Lining Luo, Huanjia Liu, Bobo Wu, Shuhan Liu, Xiaoxuan Bai, Wei Liu, Xiangyang Liu, Yiming Wu, Shumin Lin, Zhihui Guo, Yunqian Lv, Yifeng Xue
Summary: The study conducted online monitoring of metal elements in PM2.5 with 1-h time resolution in Beijing from 22nd August 2018 to 21st August 2019 to explore high-resolution temporal variation characteristics and pollution sources. The results showed significant improvement in atmospheric metal pollution in Beijing, with main sources including soil and dust, vehicle non-exhaust emissions, biomass burning, etc., and different sources affecting the pollution in different seasons.
ENVIRONMENTAL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Xinxi Chen, Jiansu Mao, Hezhong Tian
Article
Engineering, Environmental
Xiaoxuan Bai, Lining Luo, Hezhong Tian, Shuhan Liu, Yan Hao, Shuang Zhao, Shumin Lin, Chuanyong Zhu, Zhihui Guo, Yunqian Lv
Summary: Utilizing a bottom-up approach, this study quantitatively evaluated vanadium emissions in China from 1949 to 2017, revealing a sharp decrease in anthropogenic vanadium emissions after 2011, with coal and oil combustion being major sources. Industrial processes and natural sources also contributed significantly to vanadium emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Shuhan Liu, Hezhong Tian, Xiaoxuan Bai, Chuanyong Zhu, Bobo Wu, Lining Luo, Yan Hao, Wei Liu, Shumin Lin, Shuang Zhao, Kun Wang, Kaiyun Liu, Jiajia Gao, Qiang Zhang, Kai Zhang, Haidong Kan, Yang Liu, Jiming Hao
Summary: The study revealed significant cancer risks associated with high-level exposure to trace elements in China, with varying risks across different regions. From 2012 to 2015, the national annual mean population-weighted concentrations of 11 trace elements decreased by 9.8-35.6%, largely attributed to emission reduction from coal combustion.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Hongyan Zhao, Guannan Geng, Yang Liu, Yu Liu, Yixuan Zheng, Tao Xue, Hezhong Tian, Kebin He, Qiang Zhang
Summary: Air pollution globalization has significant transboundary health impacts, reducing global average life expectancy by 0.23 years and causing 1.03 million premature deaths. Even in less polluted regions, consumption in other regions contributes to life expectancy reduction.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Engineering, Environmental
Zhihui Guo, Xiaoxuan Bai, Shuhan Liu, Lining Luo, Yan Hao, Yunqian Lv, Yifei Xiao, Junqi Yang, Hezhong Tian
Summary: Cement production contributes significantly to CO2 and HAP emissions. While most HAP emissions have been controlled, atmospheric mercury emissions have increased unexpectedly, along with fuel and process-related CO2 emissions. Industrial adjustment policies have influenced the changes in emission characteristics. Environmental technology upgrades and capacity structure adjustments are driving forces for reducing HAP emissions, while energy intensity improvements can offset some of the impacts of increased clinker/cement production. Ultra-low emission and low-carbon technology transformation are key to achieving synergistic reduction of CO2 and HAP emissions in the future.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Engineering, Environmental
Xiaoxuan Bai, Hezhong Tian, Chuanyong Zhu, Lining Luo, Yan Hao, Shuhan Liu, Zhihui Guo, Yunqian Lv, Dongxue Chen, Biwu Chu, Shuxiao Wang, Jiming Hao
Summary: Toxic trace elements (TEs) pose risks to ecosystems and human health, but understanding of atmospheric emission inventories for TEs is lacking. This study reviews existing research on global, regional, and sectoral scales, highlighting discrepancies in Hg emissions and source classification. Developing countries lack official emission inventories, despite numerous studies on national emissions and specific sources. Emissions from waste incineration and traffic-related sources are a growing concern. More extensive and in-depth studies are needed to establish precise emission inventories based on field measurements and investigation to reduce uncertainty.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Shuha Liu, Hezhong Tian, Chuanyong Zhu, Ke Cheng, Yan Wang, Lining Luo, Xiaoxuan Bai, Yan Hao, Shumin Lin, Shuang Zhao, Shuxiao Wang, Biwu Chu, Zhihui Guo, Yunqian Lv, Jiming Hao
Summary: The implementation of air pollution control measures has reduced trace element emissions and their associated health risks synergistically. However, there is still a lack of systematic understanding of the effects of these measures on trace element emissions. In this study, we establish a national anthropogenic trace element emission inventory for mainland China and find that total emissions have decreased by 33.8% from 2012 to 2017. Industrial boiler upgrades have been identified as the largest driver of emissions reduction. These trends in trace element emissions have significant implications for exposure and health risks.
Article
Environmental Sciences
Lulu Cui, Di Wu, Shuxiao Wang, Qingcheng Xu, Ruolan Hu, Jiming Hao
Summary: This study conducted four intensive field measurements of volatile organic compounds (VOCs) in Beijing to characterize VOC sources and their contributions to air pollution. The results showed that fuel evaporation and diesel exhaust were the main contributors to O-3 pollution, while diesel exhaust and coal and biomass combustion were the dominant contributors to secondary organic aerosol formation potential (SOAFP).
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
