|Name||Mr. Domenic Contrino|
|Organization or Institution||University of Florida|
Mechanism for Air Phase Elemental Mercury Capture on Activated Carbon
Regina Rodriguez, David Mazyck, Domenic Contrino
University of Florida
Mechanisms for elemental gas phase mercury adsorption onto commercial activated carbons of varying source material was investigated. Source materials included bituminous coal, coconut shells and wood char. Elemental gas phase mercury adsorption experiments were conducted in an inert environment at ambient temperatures in a fixed bed quartz flow through reactor. It was found that the untreated as-received carbons produced significantly different results with the bituminous coal activated carbon exhibiting the best mercury removal; this performance is attributed to a high number of free carbene active sites on the carbon surface and the inherent aromaticity of the high rank coal precursor. Surface chemistry modifications were performed on the activated carbons and it was found that removing oxygen containing functional groups, thereby exposing free carbene active sites, improved breakthrough times upwards of 6 times from 0.5 hours to over 3 hours. Interestingly, there were no such correlations found with physical characterizations of the activated carbons such as total surface area and average pore size.