☆ 4.7 Article

Research on migration and transformation behavior of selenium during the dual-alkali wet flue gas deacidification process in the simulated flue gas

FUEL (2023)

Related references

Note: Only part of the references are listed.

Review Environmental Sciences

A critical review on lead migration, transformation and emission control in Chinese coal-fired power plants

Yicheng Wang et al.

Summary: This study reviews the distribution characteristics of lead in coal and combustion by-products, summarizes the formation and migration mechanisms of particulate lead, and proposes targeted measures to control its formation and improve removal efficiency. However, the formation mechanism of fine particulate lead is still unclear, and there are differences in the removal principles of fine particles and particulate lead, posing a challenge for precise lead emission control.

JOURNAL OF ENVIRONMENTAL SCIENCES (2023)

Add to Collection

Article Environmental Sciences

Condensation and adsorption characteristics of gaseous selenium on coal-fired fly ash at low temperatures

Bing Yuan et al.

Summary: Selenium in gaseous form is difficult to retain in solid phases during coal combustion due to its high saturated vapor pressure. Understanding the migration of SeO2(g) on ash particles in the low-temperature zone is essential for controlling selenium emission. The physically-bound Se in fly ash consists of selenium condensation and physical adsorption, with mullite showing the best performance in selenium capture at temperatures between 90-200 degrees C.

CHEMOSPHERE (2022)

Add to Collection

Article Environmental Sciences

Stability evaluation of potentially toxic elements in MSWI fly ash during carbonation in view of two leaching scenarios

Weihua Li et al.

Summary: Carbonation treatment by alkaline fly ash affects the stability of potentially toxic elements (PTEs), increasing the leachability of PTEs, especially in acetic acid leaching. The formation of carbonate minerals in the ash matrix can decrease the environmental risk level of PTEs, but excessive carbonation can lead to an increase in environmental risk due to decalcification. Both natural and accelerated carbonation increase the potential environmental risk of PTEs in the carbonated fly ash matrix.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Add to Collection

Article Engineering, Chemical

Summary of research progress on industrial flue gas desulfurization technology

Xueke Li et al.

Summary: This article summarizes the development and issues of gas desulfurization technology, discusses key theories and optimal parameters in the desulfurization process, and enhances the added value of desulfurization technology through studying the recycling of desulfurization products.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

Add to Collection

Article Engineering, Environmental

The effect of SO2 on CaO capture selenium in the flue gas: Density functional theory and experimental study

Yang Yu et al.

Summary: In this study, the mechanism of SO2 on the capture of selenium by CaO was investigated using density functional theory (DFT) and adsorption experiments. The results showed that SO2 could inhibit the capture of selenium by CaO, but also promote it within a certain concentration range. Additionally, SO2 and selenium oxides were found to chemically adsorb on the CaO surface, with SO2 having a stronger adsorption activity for selenium. Furthermore, it was observed that the CaSO4 surface was inert for selenium adsorption, and the transition of CaO to CaSO4 inhibited selenium adsorption.

CHEMICAL ENGINEERING JOURNAL (2022)

Add to Collection

Article Engineering, Environmental

Effect of hydrated lime on the migration behavior of selenium in the MSWI plants: Experimental and theoretical study

Bing Yuan et al.

Summary: This study investigated the migration behavior and transformation mechanism of selenium in semi-dry reactors used in municipal solid waste incineration. The results showed that the semi-dry reactor increased selenium retention and the proportion of selenite in fly ashes. Lime slurry spraying enhanced selenium capture by forming selenite, while HCl, SO2, and H2O inhibited selenium adsorption. Theoretical calculations revealed the reaction site for SeO2 adsorption on Ca(OH)2 surface.

CHEMICAL ENGINEERING JOURNAL (2022)

Add to Collection

Article Environmental Sciences

Characteristics, correlations and health risks of PCDD/Fs and heavy metals in surface soil near municipal solid waste incineration plants in Southwest China

Xin Bo et al.

Summary: This study investigated and evaluated the presence of PCDD/Fs and heavy metals in soil near MSW incineration plants in Sichuan province. The findings revealed the coexistence and coaccumulation of these pollutants in soil and demonstrated that the health risks associated with them were within acceptable levels.

ENVIRONMENTAL POLLUTION (2022)

Add to Collection

Article Environmental Sciences

A comprehensive emission inventory of hazardous air pollutants from municipal solid waste incineration in China

Zhiqiang Fu et al.

Summary: The release of hazardous air pollutants (HAPs) from municipal solid waste incineration (MSWI) plants in China has raised concerns. This study established a comprehensive emission inventory of HAPs from MSWI plants in China from 2006 to 2017. The results showed that HAPs emissions initially increased and then stabilized due to the implementation of stricter emission standards. The emissions were concentrated in developed coastal provinces and cities. Continuous improvement in pollution control devices and MSWI management is crucial to minimize the harmful impacts of HAPs.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Add to Collection

Article Energy & Fuels

Gaseous selenium removal by metal oxide sorbent: Experimental and density functional theory study

Yang Yu et al.

Summary: The characteristics and surface transformation of metal oxides capturing SeO2 were investigated using density functional theory (DFT). The study revealed differences in the adsorption capacity of various metal oxides and the instability of adsorption products. It was found that Fe top sites act as active adsorption sites for Se0.

FUEL (2022)

Add to Collection

Article Chemistry, Applied

Insights into the transformation mechanism of Se in sized ash particles arising from coal combustion: Model vs. experiment

Huimin Liu et al.

Summary: This study develops a comprehensive transformation model of selenium during coal combustion and validates it through field tests. The results reveal different transformation stages of selenium and identify the enrichment of selenium in small particles. Additionally, the study uncovers factors influencing the gas-to-solid transformation of selenium.

FUEL PROCESSING TECHNOLOGY (2022)

Add to Collection

Article Engineering, Environmental

Improved removal of selenium by calcite-derived CaO with porosity and anti-sintering in presence of acid gas

Mengzhu Yu et al.

Summary: Injecting Ca-based sorbent into the furnace is a promising technology for controlling selenium emissions. Using calcite-derived CaO as a sorbent has shown significant advantages in terms of porosity and anti-sintering, with capture efficiency reaching up to 80-90% at 700-800 degrees Celsius. The effects of CO2 and SO2 on selenium capture differ, with CO2 inhibiting capture below 700 degrees Celsius due to the formation of CaCO3, and SO2 promoting capture at lower CaSO4 content but hindering capture at higher CaSO4 content.

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING (2022)

Add to Collection

Review Energy & Fuels

Review on occurrence, speciation, transition and fate of sulfur in typical ultra-low emission coal-fired power plants

Zhiyong Zhou et al.

Summary: The paper reviews the generation, transformation, and control of sulfuric pollutants in coal-fired power plants, with a focus on the application of ultra-low emission technology in air pollutant control. The occurrence and transformation mechanism of sulfur in different environments, as well as the factors influencing device performance, are analyzed throughout the whole process from coal combustion to the passage of flue gas through control devices. The factors affecting the removal efficiency of sulfur in APCDs are also discussed, and suggestions for optimizing operation are provided.

JOURNAL OF THE ENERGY INSTITUTE (2022)

Add to Collection

Article Engineering, Environmental

The Effect of Wet Treatment on the Distribution and Leaching of Heavy Metals and Salts of Bottom Ash from Municipal Solid Waste Incineration

Yonghao Zhu et al.

Summary: The study investigated the effect of wet treatment on reducing heavy metal and salt leaching potential in bottom ash. The results showed that wet treatment significantly decreased the leaching concentration of Cu, Zn, Ni, and other targeted elements, improving the suitability of municipal solid waste incineration bottom ash for reutilization.

ENVIRONMENTAL ENGINEERING SCIENCE (2022)

Add to Collection

Article Environmental Sciences

Migration and emission behavior of arsenic and selenium in a circulating fluidized bed power plant burning arsenic/selenium-enriched coal

Yongda Huang et al.

Summary: This study investigated the migration and emission behavior of arsenic and selenium in a circulating fluidized bed power plant equipped with fabric filter and wet flue gas desulfurization system. The results showed arsenic was mainly enriched in bottom ash and fly ash, while selenium was mainly captured by fly ash. Limestone injection into furnace promoted the retention of arsenic and selenium in ash residues.

CHEMOSPHERE (2021)

Add to Collection

Article Engineering, Environmental

Elemental mercury removal from coal-fired flue gas using recyclable magnetic Mn-Fe based attapulgite sorbent

Lu Dong et al.

Summary: Magnetic manganese-iron modified attapulgite sorbents were synthesized and shown to have optimal Hg-0 removal activity in coal-fired flue gas under certain conditions, which could potentially reduce costs and maximize the utilization of green energy sources.

CHEMICAL ENGINEERING JOURNAL (2021)

Add to Collection

Article Environmental Sciences

Performance and mechanism of oxidation, and removal of trace SeO2 in flue gas utilizing a H2O2, NaClO2, and Ca2+ slurry

Jingxiang Ma et al.

Summary: A method for oxidation and absorption of selenium dioxide in flue gas emitted from coal-fired power plants was proposed, which significantly reduces the toxicity of selenium to the environment. The study showed that high oxidation efficiency can be achieved by using H2O2 and NaClO2, leading to a decrease in selenium toxicity.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)

Add to Collection

Article Thermodynamics

SOx removal and emission characteristics of WFGD system applied in ultra-low emission coal-fired power plants

Yonglong Yang et al.

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)

Add to Collection

Article Engineering, Environmental

The distribution and conversion of selenite and selenate with the bubbling of simulated flue gas in simulated WFGD slurry

Qiyu Weng et al.

Summary: The research found that selenite in simulated slurry can be reduced by SO2 to form amorphous elemental selenium, while selenate remains unaffected. Increasing SO2 concentration in flue gas accelerates the reduction of selenite, and the reduction reaction is exothermic. Additionally, the oxidation effect of S2O82- competes with the reduction effect of SO2.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Add to Collection

Article Environmental Sciences

Removal of gas-phase arsenic and selenium in flue gas by a new combined spray-and-scattered-bubble technology based on ammonia desulphurization

Yue Zhang et al.

Summary: Integrated control of multiple pollutants is an effective and economical approach for pollution reduction. The spray-and-scattered-bubble (SSB) technology shows promising ability in removing gas phase arsenic and selenium simultaneously. Key operating parameters such as ammonia concentration and SO2 concentration have a significant impact on arsenic and selenium removal efficiency.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

Add to Collection

Article Engineering, Environmental

Selenium migration behaviors in wet flue gas desulfurization slurry and an in-situ treatment approach

Renjie Zou et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Add to Collection

Article Energy & Fuels

Experimental and Density Functional Theory Study of the Adsorption Characteristics of CaO for SeO2 in Simulated Flue Gas and the Effect of CO2

Changle Yuan et al.

ENERGY & FUELS (2020)

Add to Collection

Article Engineering, Environmental

Modeling Study of Selenium Migration Behavior in Wet Flue Gas Desulfurization Spray Towers

Renjie Zou et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

Add to Collection

Review Thermodynamics

A review on mercury in coal combustion process: Content and occurrence forms in coal, transformation, sampling methods, emission and control technologies

Shilin Zhao et al.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2019)

Add to Collection

Review Energy & Fuels

Flue gas desulfurization effluents: An unexploited selenium resource

Patricia Cordoba et al.

FUEL (2018)

Add to Collection

Article Engineering, Environmental

Heavy metal mobility and valuable contents of processed municipal solid waste incineration residues from Southwestern Germany

Sergey Abramov et al.

WASTE MANAGEMENT (2018)

Add to Collection

Review Energy & Fuels

Partitioning and speciation of selenium in wet limestone flue gas desulphurisation systems: A review

Patricia Cordoba

FUEL (2017)

Add to Collection

Review Engineering, Environmental

Chlorophenols in Municipal Solid Waste Incineration: A review

Yaqi Peng et al.

CHEMICAL ENGINEERING JOURNAL (2016)

Add to Collection

Article Engineering, Environmental

Combined effects of FeCl3 and CaO conditioning on SO2, HCl and heavy metals emissions during the DDSS incineration

Jingyong Liu et al.

CHEMICAL ENGINEERING JOURNAL (2016)

Add to Collection

Article Engineering, Environmental

Selenium Partitioning and Removal Across a Wet FGD Scrubber at a Coal-Fired Power Plant

Constance L. Senior et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2015)

Add to Collection

Article Engineering, Environmental

Modeling of the fluid dynamics and SO2 absorption in a gas-liquid reactor

Luca Marocco

CHEMICAL ENGINEERING JOURNAL (2010)

Add to Collection

Article Energy & Fuels

Effect of oxidizing agents on selenate formation in a wet FGD

Hiroyuki Akiho et al.

FUEL (2010)

Add to Collection

Article Engineering, Environmental

Chlorine characterization and thermal behavior in MSW and RDF

Wenchao Ma et al.

JOURNAL OF HAZARDOUS MATERIALS (2010)

Add to Collection

Article Thermodynamics

Prediction of SO2 removal efficiency for wet Flue Gas Desulfurization

Binlin Dou et al.

ENERGY CONVERSION AND MANAGEMENT (2009)

Add to Collection

Review Biochemistry & Molecular Biology

Chemistry of the M (M=Fe, Ca, Ba)-Se-H2O Systems at 25 °C

Tadahisa Nishimura et al.

MOLECULES (2009)

Add to Collection

Article Engineering, Environmental

Application of chitosan as flocculant for coprecipitation of Mn(II) and suspended solids from dual-alkali FGD regenerating process

Zhong-Biao Wu et al.

JOURNAL OF HAZARDOUS MATERIALS (2008)

Add to Collection

Article Metallurgy & Metallurgical Engineering

Chemistry of the Ca-Se(IV)-H2O and Ca-Se(VI)-H2O systems at 25 °C

Tadahisa Nishimura et al.

HYDROMETALLURGY (2007)

Add to Collection

Article Engineering, Environmental

Simultaneous removal of SO2 and trace SeO2 from flue gas:: Effect of SO2 on selenium capture and kinetics study

Yuzhong Li et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2006)

Add to Collection

Review Chemistry, Applied

Status of trace element emission in a coal combustion process: a review

MH Xu et al.

FUEL PROCESSING TECHNOLOGY (2004)

Add to Collection

© Peeref 2019-2024. All rights reserved.