Mercury control by injection of activated carbon and calcium-based sorbents. Report for October 1993-March 1995

Technical Report · Mon Sep 01 04:00:00 EDT 1997

OSTI ID:529815

Krishnan, S V; Gullett, B K; Jozewicz, W

The paper compares the capture of both elemental mercury (Hg deg) and mercuric chloride (HgCl2) vapor by different types of commercially available activated carbons and calcium (Ca)-based sorbents, including quicklime (CaO) and hydrated lime, Ca(OH)2. Comparisons were made at two temperatures in bench-scale reactors, with other conditions remaining identical. Study results showed that, at the lower temperature (about 100 C), Ca-based sorbents capture incoming HgCl2 as well as activated carbons. At the higher temperature (140 C), activated carbons showed relatively higher capture of HgCl2 than Ca-based sorbents. However, only activated carbons exhibited significant capture of Hg deg at either temperature. Because field measurements and equilibrium predictions show that Hg in MWC flue gas exists primarily as HgCl2, the results indicate the possibility of injecting CaO or Ca(OH2) along with activated carbons to reduce operating costs.

• Research Organization: Acurex Environmental Corp., Research Triangle Park, NC (United States)
• OSTI ID: 529815
• Report Number(s): PB--97-193783/XAB; CNN: Contract EPA-68-D5-0005
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
ACTIVATED CARBON
AIR POLLUTION CONTROL
CALCIUM
COMPARATIVE EVALUATIONS
MERCURY