Fixed-bed studies of the interactions between mercury and coal combustion fly ash

Dunham, Grant E.; DeWall, R.A.; Senior, Constance L.

doi:10.1016/s0378-3820(03)00070-5

Cited by 172 publications

(161 citation statements)

References 5 publications

Supporting

Mentioning

153

Contrasting

Unclassified

Order By: Relevance

“…Although the surface area values (Table 1) are very low compared to those of the microporous materials, the results obtained in this work and other works [14,25] suggest that they may be significant enough to have an influence on mercury capture.…”

Section: Resultscontrasting

confidence: 43%

The influence of carbon particle type in fly ashes on mercury adsorption

López-Antón

Abad-Valle

Dı́az-Somoano

et al. 2009

Fuel

View full text Add to dashboard Cite

Recent research has shown that certain fly ash materials produced in coal combustion for power generation have an affinity for the mercury compounds present in flue gases. However, the exact nature of Hg-fly ash interactions is still unknown and the different variables that influence mercury adsorption need to be identified. In this work the microscopic components of fly ashes derived from the combustion of different types of feed blends of different coal rank and mercury adsorption were investigated. The aim of this research was to establish relationships between Hg retention and the type of unburned carbons present in various fly ashes. The fly ashes and fly ash fractions studied were used as sorbent beds for high mercury concentrations, conditions in which mercury retention is highly favored. From the results obtained it was confirmed that the role of the unburned carbon components in mercury capture may depend, among other factors, on the type of unburned carbon. Fly ashes capture different species of mercury depending on their nature and the type of anisotropic particles.

show abstract

Section: Resultscontrasting

confidence: 43%

The influence of carbon particle type in fly ashes on mercury adsorption

López-Antón

Abad-Valle

Dı́az-Somoano

et al. 2009

Fuel

View full text Add to dashboard Cite

show abstract

“…18). For bituminous-coal fly-ash samples from pulverized-coalfired boilers, the surface area of C present in the ash is between 40 and 100 m 2 /g C [56], which is in agreement with the values reported by Gao et al [59] and Pedersen et al [60] for Class F (bituminous) fly-ash samples. The cyclone-and stoker-ash samples have much lower C surface areas (8-11 m 2 /g C), which may explain the lower percentage of Hg removal for ESP in Fig.…”

Section: Discussionsupporting

confidence: 90%

“…These conclusions cannot be extended to fly ash from subbituminous coal and lignite, however. There is evidence in the literature [56,59,61] that the surface area of C from Class C (subbituminous) fly ash samples is significantly higher than that of Class F fly-ash samples on a per gram of C basis.…”

Section: Air Pollution Control Devicesmentioning

confidence: 99%

A review of elemental mercury removal processing

Bae¹,

Kim²,

Park³

2011

Carbon letters

View full text Add to dashboard Cite

Public concern has recently increased over the potential risk of toxic elements emitted from anthropogenic sources. Among these, mercury has drawn special attention owing to its increasing level of bioaccumulation in the environment and in the food chain, with potential risks for human health. This paper presents an overview of research related to mercury control technology and identifies areas requiring additional research and development. It critically reviews measured mercury emissions progress in the development of promising control technologies, including catalytic oxidation, sorbent injection, photochemistry oxidation, and air pollution control devices.

show abstract

“…Several full-, pilot-, and bench-scale studies have revealed that fly ashes can both adsorb and oxidize Hg in coal combustion flue gases [6][7][8][9][10][11][12][13][14]. A number of investigations have attempted to correlate Hg retention and oxidation with the content and characteristics of unburned carbon in raw fly ashes [15][16][17] and have found that, in general, Hg capture increases in fly ashes with a high carbon content [18].…”

Section: Because the Different Modes Of Occurrence Of Hg Involve Diffmentioning

confidence: 99%