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)
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)
Review
Environmental Sciences
Sen Liu, Wei Liu, Fen Jiao, Wenqing Qin, Congren Yang
Summary: This article reviews the production and beneficial utilizations of FGD gypsum in China, where the government has implemented numerous desulfurization measures since 2006 to address serious SO2 emissions. With production exceeding 108 tons and continually increasing energy consumption, the properties and applications of FGD gypsum are summarized here.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Multidisciplinary
Lawrence Koech, Raymond C. Everson, Burgert Hattingh, Hilary Rutto, Letsabisa Lerotholi, Hein W. J. P. Neomagus
Summary: This study investigated the absorption of SO2 from flue gases using three different sorbents in a spray dryer. The findings showed that trona had the highest SO2 removal efficiency of 94% at a temperature of 120℃ and a stoichiometric molar ratio of 1.5, compared to hydrated lime (82%) and limestone (76%).
Article
Polymer Science
Mingjing Li, Guodong Huang, Bo Wang, Yi Cui, Binbin Chang, Qiaoqiao Yin, Ming Ge, Shuwei Zhang, Qi Wang, Jiacheng Feng
Summary: The addition of granulated blast furnace slag, fly ash, and solid sodium silicate can significantly improve the compressive strength and setting time of flue gas desulfurization gypsum polymer. Their incorporation promotes the formation of silicate and aluminosilicate minerals, which is the main reason for the increased strength and accelerated coagulation.
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
Mengxi Zhao, Changjun Zou
Summary: The study showed that CaCO3 nanofluids prepared with nanometer-sized particles have better stability and desulfurization efficiency in the FGD process compared to micron-sized CaCO3 slurry.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Metallurgy & Metallurgical Engineering
Lin-cheng Liu, Hai-bin Zuo, Wen-guo Liu, Zhi-qiang Xu
Summary: The continuous accumulation of FGD gypsum in steel plants causes environmental issues and resource waste. By studying different experimental conditions, it was found that under the optimal conditions, the desulfurization rate of gypsum can reach 95.79%.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Engineering, Environmental
Wan Yang, Zexin Yin, Lu Zhang
Summary: Through experiments on composting of green waste, it was found that adding silage and flue gas desulfurization gypsum can accelerate the composting process and improve the maturity and nutrient content of the compost product. According to the multi-index matrix analysis, the optimal combination is 45% silage and 2.5% flue gas desulfurization gypsum. This optimal treatment can complete the composting of green waste in 28 days and produce a stable and high-quality compost product.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
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
Horticulture
Dexter Brown Watts, George Brett Runion, Henry Allen Torbert
Summary: Efforts are being made to develop best management practices to reduce nutrient loss in surface water caused by agriculture. Adding flue gas desulfurization (FGD) gypsum as a horticultural media amendment can effectively control phosphorus (P) leaching. Mixing FGD gypsum with the growth medium is the most effective way to reduce P loss, especially when using fast-release fertilizer.
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
Environmental Sciences
Wenchao Zhang, Wenxin Zhang, Shujuan Wang, Jia Liu, Yan Li, Yuqun Zhuo, Lizhen Xu, Yonggan Zhao
Summary: Blending FGD gypsum with sodic soil is a commonly recognized method for soil reclamation, but band application may be more effective than blending. Dual-band application significantly decreased soil sodicity, while single-band treatment only addressed half horizontally. Band application could be a better option for reclaiming sodic soil with FGD gypsum due to its long-term and efficient benefits with low consumption.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
J. Xu, J. Bao, H. Liu, J. Tang, G. Xie, L. Sun
Summary: Experiments conducted in a simulated wet flue gas desulfurization system showed that sulfite and slurry temperature are key factors affecting mercury migration and re-emission. pH value and atmosphere also play a role in influencing mercury behavior in the system.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Yonglong Yang, Chenghang Zheng, Qiufeng Su, Yifan Wang, Yan Lu, Yang Zhang, Yue Zhu
Summary: This paper investigates the removal and emission characteristics of SOx (SO2 and SO3) in wet limestone-gypsum flue gas desulfurization (WFGD) based on data collected from 95 ultra-low emission coal-fired power units. The study shows that the overall removal efficiency of single absorber is above 97.5%, with the SO3 removal efficiency between 31% and 70%. Installation of inner structures in the spray absorber shows a more obvious correlation between inlet SO2 concentration and SOx removal efficiency.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
