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Thermal removal of mercury in spent powdered activated carbon from Toxecon process

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dc.contributor.author Okwadha, GDO
dc.contributor.author Li, Jin
dc.contributor.author Ramme, Bruce
dc.contributor.author Michaud, Dave
dc.contributor.author Kollakowsky, Dave
dc.date.accessioned 2015-05-26T14:30:34Z
dc.date.available 2015-05-26T14:30:34Z
dc.date.issued 2009
dc.identifier.citation Journal of Environmental Engineering Volume 135, Issue 10 (October 2009) en_US
dc.identifier.uri http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EE.1943-7870.0000074
dc.identifier.uri http://hdl.handle.net/123456789/1096
dc.description.abstract This research developed and demonstrated a technology to liberate Hg adsorbed onto powdered activated carbon (PAC) by the TOXECON process using pilot-scale high temperature air slide (HTAS) and bench-scale thermogravimetric analyzer (TGA). The HTAS removed 65, 83, and 92% of Hg captured with PAC when ran at 900°F , 1,000°F , and 1,200°F , respectively, while the TGA removed 46 and 100% of Hg at 800°F and 900°F , respectively. However, addition of CuO–Fe2O3 mixture and CuCl catalysts enhanced Hg removal and PAC regeneration at lower temperatures. CuO–Fe2O3 mixture performed better than CuCl in PAC regeneration. Scanning electron microscopy images and energy dispersive X-ray analysis show no change in PAC particle aggregation or chemical composition. Thermally treated sorbents had higher surface area and pore volume than the untreated samples indicating regeneration. The optimum temperature for PAC regeneration in the HTAS was 1,000°F . At this temperature, the regenerated sorbent had sufficient adsorption capacity similar to its virgin counterpart at 33.9% loss on ignition. Consequently, the regenerated PAC may be recycled back into the system by blending it with virgin PAC. en_US
dc.language.iso en en_US
dc.subject Activated carbon en_US
dc.subject Mercury en_US
dc.subject Metals en_US
dc.subject Chemical en_US
dc.subject Adsorption en_US
dc.subject Abatement and removal en_US
dc.subject Thermal factors en_US
dc.title Thermal removal of mercury in spent powdered activated carbon from Toxecon process en_US
dc.type Article en_US

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