Reaction Characteristics of Elemental and Oxidized Mercury with Fly Ash Components

Lee, Sang-Sup; Kim, Kwang‐Yul; Oh, Kwang–Joong; Jeon, Jun-Min; Kang, Dong-Chang

doi:10.7464/ksct.2013.19.4.453

Cited by 6 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the mercury compound analysis, several methods, such as atomic absorptional spectrometry (AAS), atomic fluorescence spectrometry (AFS), or inductively coupled plasma atomic emission spectrometry (ICP-AES) were available [19]. However, to analyze the concentration of mercury compounds, Lumax Ra 915+ of the cold vapor atomic absorption (CVAA) method was used in this study after collecting and recovering the sample [20]. The minimum sensitivity was 0.5 ng/L.…”

Section: Analysis Methodsmentioning

confidence: 99%

Oxidation Enhancement of Gaseous Elemental Mercury Using Waste Steel Slag under Various Experimental Conditions

et al. 2023

View full text Add to dashboard Cite

In this study, the oxidation characteristics of elemental mercury were assessed based on the input gas environment, temperature, and particle size distribution of the steel slag. Experiments were performed at room temperature, 100 °C and 200 °C, under air and simulated gas environments. The oxidation reaction of elemental mercury was conducted using steel slag samples of 1 mm, 2.36 mm, and 4.75 mm at various conditions. From the basic characteristic analysis of the steel slag, it was found that the steel slag exhibits a similar composition to that of fly ash, and it can be utilized as an oxidizing agent. Results show that regardless of the temperature and the particle size distribution of steel slag, the oxidation reaction of elemental mercury rarely occurred in the air environment. However, in the case of the HCl gas environment, it was observed that the smaller the steel slag particle size, the stronger the oxidation reaction. It is believed that the oxidation efficiency of the steel slag increased as the contact area between the gas and particles increased. The oxidation reactivity was nearly two times higher in the temperature range of 100 °C to 200 °C than it was at room temperature. It is advised that further research be undertaken in order to determine the precise temperature range at which the oxidation reaction occurs.

show abstract

Section: Analysis Methodsmentioning

confidence: 99%

Oxidation Enhancement of Gaseous Elemental Mercury Using Waste Steel Slag under Various Experimental Conditions

et al. 2023

View full text Add to dashboard Cite

show abstract

“…특히, 원소 수은에 만성적으로 노출되면 신경과민, 흥분 및 떨림 현상이 나타나며, 원소수은으로부터 생성된 메틸수은에 만성적으로 노출되면 감각 이상 및 시력감퇴 등이 나타난다. 가장 대표적 인 인위적인 수은 배출원은 석탄화력발전소로 수은 화합물의 장거리 이동성 때문에 수은은 지역적인 문제일 뿐만 아니라 전 지국적인 문제로 부각되고 있다 [4][5][6][7][8][9]. 국가 간 인위적인 수 은배출을 억제하기 위한 규제 방안으로 유엔환경계획(UNEP) 을 중심으로 각 국가의 산업시설별 수은 배출원 목록과 배출량 산정을 통해 자발적인 수은 배출원 관리 및 저감 방안 도출을 추진해 오고 있기 때문에 이의 근간이 되는 표준화된 수은농도 연속측정시스템 개발은 지속적인 관심의 대상이다 [10,11].…”

Section: 서 론unclassified

Catalytic Reduction of Oxidized Mercury to Elemental Form by Transition Metals for Hg CEMS

Ham¹

2014

Clean Technology

View full text Add to dashboard Cite

: This study was aimed to develop catalytic system for the dry-based reduction of oxidized mercury (Hg 2+ ) to elemental mercury (Hg 0 ) which is one of the most important components comprising mercury continuous emission monitoring system (Hg-CEMS). Based on the standard potential in oxidation-reduction reaction, transition metals including Fe, Cu, Ni and Co were selected as possible candidates for catalyst proceeding spontaneous reduction of Hg 2+ into Hg 0 . These transition metal catalysts revealed high activity for reduction of Hg 2+ into Hg 0 in the absence of oxygen in reactant gases. However, their activities were greatly decreased in the presence of oxygen, which was attributed to the transformation of transition metals by oxygen to the corresponding transition metal oxides with less catalytic activity for the reduction of oxidized mercury. Hydrogen supplied to the reactant gases significantly enhanced Hg 2+ reduction activity even in the presence of oxygen. It might be due to occurrence of combustion reaction between H2 and O2 causing the consumption of O2 at such high reaction temperature at which oxidized mercury reduction reaction took place. Because the system showed high activity for Hg 2+ reduction to Hg 0 , which was compatible to that of wet-chemistry technology using SnCl2 solution, the catalytic reduction system of Fe catalyst with the supply of H2 could be employed as a commercial system for the reduction of oxidized mercury to elemental mercury.

show abstract

Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant

Sung

Back

Jung

et al. 2017

International Journal of Coal Geology

View full text Add to dashboard Cite

Reaction Characteristics of Elemental and Oxidized Mercury with Fly Ash Components

Cited by 6 publications

References 10 publications

Oxidation Enhancement of Gaseous Elemental Mercury Using Waste Steel Slag under Various Experimental Conditions

Oxidation Enhancement of Gaseous Elemental Mercury Using Waste Steel Slag under Various Experimental Conditions

Catalytic Reduction of Oxidized Mercury to Elemental Form by Transition Metals for Hg CEMS

Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant

Contact Info

Product

Resources

About