Guest Editors
Dunxi Yu, Huazhong University of Science & Technology, China
M. Mercedes Díaz Somoano, Institute of Carbon Science and Technology, INCAR-CSIC, Spain
Shuiqing Li, Tsinghua University, China
Lian Zhang, Monash University, Australia
Changdong Sheng, Southeast University, China
Yongchun Zhao, Huazhong University of Science & Technology, China
Summary
In the new era of energy transition to a low carbon future, technologies for air pollutant emission control are the key to enabling solid fuel utilization in the power sector in a more environmental and friendly way. While the acid gases such as SO2 and NOx have long been the focus and the control technologies are in a mature state, it is not until the early 21th century that PM2.5 and Hg emissions from power plants received significant attention. In the past decades, great advances have been achieved in scientific understanding and technology development of controlling PM2.5 and Hg emissions from combustion of various solid fuels (coal, biomass, MSW, etc.). There have been a wide range of technologies available, including separate and co-benefit methods. Some of them have been applied in industries, while some are still under development. This special issue aims to provide an excellent forum for scientists and engineers around the world to share and exchange their latest contributions to the understanding of PM2.5 and Hg emissions and the development of related control technologies. Both original papers and review articles are all welcome.
The scope of the Special Issue covers a broad range of topics. They include but are not limited to:
1. Sampling and analytical methods
2. Measurements and modeling
3. Chemistry and physics
4. Quality assurance and quality control
5. Impacts on the environment and human health
6. Control technologies and strategies, such as
• Electrostatic Precipitator (ESP, wet or dry)
• Fabric Filter (FF) or Baghouse (BH)
• Hybrid ESP-FFs
• Scrubber (wet or dry)
• Activated Carbon Injection (ACI)
• Sorbent Injection
• Halogen Addition
• NOx Catalyst
• Co-benefit Methods of Control
Keywords
Clean combustion; PM
2.5; Mercury; Emission; Control technology; Co-Benefit.
Published Papers
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Open Access
ARTICLE
HCl-Induced Hg0 Transformation over CuMn2O4 Sorbent
Aijia Zhang, Yingju Yang, Jing Liu, Junyan Ding
Energy Engineering, Vol.119, No.2, pp. 499-510, 2022, DOI:10.32604/ee.2022.015504
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract CuMn
2O
4 spinel has been regarded as a highly efficient sorbent for Hg
0 capture from flue gas. The regenerability and recyclability of CuMn
2O
4 sorbent are mainly associated with the mercury speciation adsorbed on its surface. However, the effect mechanism of HCl on Hg
0 transformation over CuMn
2O
4 sorbent is still elusive. Experiments were conducted to understand the effect of HCl on Hg
0 transformation over CuMn
2O
4 sorbent. The results indicate that CuMn
2O
4 sorbent is a mesoporous material and possesses a good thermal stability. CuMn
2O
4 shows >95% Hg
0 removal efficiency in a wide temperature window of 50–350°C. The favorable electron-transfer environment caused by the…
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Open Access
ARTICLE
Angle Scattering Method for Soot Concentration Measurement under Ultra-Low Emissions Condition
Bin Yang, Xingchen Zhu, Jie Deng, Xiaoxu Guo, Jinke Han, Xiaowei Liu
Energy Engineering, Vol.119, No.2, pp. 511-522, 2022, DOI:10.32604/ee.2022.016079
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract Aiming at the problem of soot concentration measurement under ultra-low emission conditions, a forward small angle soot concentration measurement method is proposed. Taking a typical boiler emission of 0.1 μm–3.0 μm bimodal distribution soot as an object, the particle scatter simulation calculation under different parameters is carried out, and the influence of detection angle and particle size on the angular scattering measurement of ultra-low emission soot is analyzed. The influence of detection angle and particle size on the angular scattering measurement of ultra-low emission soot is analyzed. Preferably, the wavelength of incident light is 650 nm, and the forward detection…
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Open Access
ARTICLE
Experimental Research on Mercury Catalytic Oxidation over Ce Modified SCR Catalyst
Yadi Qin, Qiyu Weng, Yuqun Zhuo
Energy Engineering, Vol.119, No.1, pp. 35-47, 2022, DOI:10.32604/EE.2022.015477
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract In order to improve the ability of SCR catalyst to catalyze the oxidation of gaseous elemental mercury, a series of novel Ce modified SCR (Selection Catalytic Reduction, V
2O
5–WO
3/TiO
2) catalysts were prepared via two-step ultrasonic impregnation method. The performance of Ce/SCR catalysts on Hg
0 oxidation and NO reduction as well as the catalytic mechanism on Hg
0 oxidation was also studied. The XRD, BET measurements and XPS were used to characterize the catalysts. The results showed that the pore volume and pore size of catalyst was reduced by Ce doping, and the specific surface area decreased with the increase of Ce content…
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Open Access
ARTICLE
Field Studies on the Removal Characteristics of Particulate Matter and SOx in Ultra-Low Emission Coal-Fired Power Plant
Xu Zhao, Houzhang Tan, Fuxin Yang, Shuanghui Deng
Energy Engineering, Vol.119, No.1, pp. 49-62, 2022, DOI:10.32604/EE.2022.015622
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract In order to reduce the environmental smog caused by coal combustion, air pollution control devices have been widely used in coal-fired power plants, especially of wet flue gas desulfurization (WFGD) and wet electrostatic precipitator (WESP). In this work, particulate matter with aerodynamic diameter less than 10 μm (PM
10) and sulfur oxides (SO
x) have been studied in a coal-fired power plant. The plant is equipped with selective catalytic reduction, electrostatic precipitator, WFGD, WESP. The results show that the PM
10 removal efficiencies in WFGD and WESP are 54.34% and 50.39%, respectively, and the overall removal efficiency is 77.35%. WFGD and WESP have…
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Open Access
ARTICLE
Impacts of Torrefaction on PM10 Emissions from Biomass Combustion
Zihao Wang, Dunxi Yu, Jingkun Han, Jianqun Wu
Energy Engineering, Vol.118, No.5, pp. 1267-1276, 2021, DOI:10.32604/EE.2021.016107
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract Typical biomass torrefaction is a mild pyrolysis process under conditions of ordinary pressure, low temperature (200–300°C) and inert atmosphere. Torrefaction is considered to be a competitive technology for biomass pretreatment, but its impacts on the emissions of particulate matter from biomass combustion are worthy of further study. In this paper, three kinds of biomass, i.e., bagasse, wheat straw and sawdust were selected for torrefaction pretreatment and the impacts of torrefaction on the emission characteristics of PM
10 from biomass combustion were investigated. The combustion experiments were carried out on a drop tube furnace. The combustion-generated particulate and bulk ash samples were…
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Open Access
ARTICLE
Uncertainties in the Mercury Mass Balance in a Coal-Based IGCC Power Plant (Puertollano, Spain)
José María Esbrí, Alba Martinez-Coronado, Sofía Rivera Jurado, Eva García-Noguero, Pablo Higueras
Energy Engineering, Vol.118, No.4, pp. 1223-1235, 2021, DOI:10.32604/EE.2021.015781
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract Mercury (Hg) is a global pollutant that is subject to strict regulations to reduce anthropogenic emissions. The production of energy represents an important activity that leads to Hg emissions into the atmosphere. Of all the systems used, IGCC plants are the most promising for reducing Hg emissions, since it is possible to remove Hg from syngas prior to combustion. The aim of the present work was to evaluate the presence of Hg in the main streams of an experimental IGCC plant (ELCOGAS, Puertollano) in order to quantify Hg emissions and investigate the possibility of reducing them. The main streams of…
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Open Access
ARTICLE
Emission Behaviors of Submicron Particles (PM1) Generated by the Combustion of Sesame Stalk after Combined Water Washing and Carbonization Pretreatment
Tianyu Liu, Chang Wen, Wenyu Wang, Kai Yan, Yongjun Xia, Rui Li, Juan Liu, Yang Zhang
Energy Engineering, Vol.118, No.3, pp. 473-485, 2021, DOI:10.32604/EE.2021.014870
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract Pretreatment before biomass combustion is significant for its efficient utilization and that combined water washing and carbonization can be efficient. An agricultural processing residues sesame stalk was selected and carried out two pretreatments separately, i.e., water washing-torrefaction (W-T) and torrefaction-water washing (T-W), to explore the effect on the fuel properties, combustion characteristics and particulate matter (PM) emission. The obtained biochar was also combusted under air and oxy50 (CO
2:O
2 = 50:50) conditions for the sake of investigating the effect of pretreatment and combustion atmosphere. The results indicate that, W-T and T-W both not only have great effect on the improvement of…
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Open Access
ARTICLE
Scavenging Effects of Kaolin on Fine Ash Formation during Zhundong Coal Combustion
Fangqi Liu, Xianpeng Zeng, Yimin Xia, Zihao Wang, Dunxi Yu
Energy Engineering, Vol.118, No.3, pp. 459-471, 2021, DOI:10.32604/EE.2021.014240
（This article belongs to this Special Issue:
Advancement of Understanding of PM2.5 and Hg Emissions and Their Control Technologies for Cleaner Combustion)
Abstract The previous work found that the additive kaolin could scavenge not only sodium (Na) but also calcium (Ca) and magnesium (Mg), which is the important ash fluxing agents in low rank coal combustion. Such scavenging effects of kaolin on fine ash formation were studied in the present work. A typical Zhundong coal and its blends with kaolin at dosages of 1, 2 and 4 wt% were combusted in an electrically heated drop tube furnace (DTF) at 1300°C. The fine ashes generated were collected and size segregated by a low pressure impactor (LPI). The morphology and chemical composition of fine ash…
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