Effectiveness of sulphur-impregnated activated carbons in mercury vapour adsorption.
Published: 2006
Language: eng
Number of pages: 98
ISBN-13: 9780494210338
Description: This study evaluates the performance of five activated carbons in Hg adsorption and the temperature effect (25 to 125&deg;C), to better understand the process of Hg adsorption by SIAC. Results suggest that the mercury attaches to SIAC via both physical and chemical adsorption. At 25&deg;C, physical adsorption contributes substantially to the overall Hg uptake, particularly when the surface area is large and the sulphur content is low. At 125&deg;C chemical adsorption dominates, which is particularly evident when the surface area is small and the sulphur content is substantial. Sulphur addition is found to enhance Hg uptake, although the type and distribution of sulphur seem more important than the amount. Using surface analyzing techniques, it was found that SO2 at 900&deg;C was capable of penetrating graphite crystals within 50 nm. Sulphur within the top 2 nm layers is likely elemental sulphur and sulphide species, with an atomic percentage of 0.6%.
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1563.

Thesis (M.A.Sc.)--University of Toronto, 2006.

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