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Multi Pollutant Control Webinar - Hot Topic Hour - Part 1, September 26, 2013

 

Revision Date:  9/26/2013

Tags:  221112 - Fossil Fuel 化石燃料, Energy & Environmental Research Center, Sargent & Lundy, Sorbent Trap, MATS, Coal, HCl, Cadmium, Selenium, Mercury, NOx, SO2, Research & Development


Cost Effective Measurement of Halogens and Metals Using a Sorbent Trap Approach by John Pavlish, Energy and Environmental Research Center (EERC) - Hot Topic Hour September 26, 2013

 

Revision Date:  9/26/2013

Tags:  221112 - Fossil Fuel 化石燃料, Energy & Environmental Research Center, Sorbent Trap, Toxic Metal, HCl, Cadmium, Selenium, MATS, Coal


Identifying Factors That Limit Mercury Capture with ACI - Electric Power May 10-12, 2011 by Christopher Martin, Research Engineer, Energy & Environmental Research Center

Draft U.S. Environmental Protection Agency hazardous air pollutant regulations for coal-fired utilities are anticipated by March 2011, and the expectation is that very high emission reductions (90% or greater) will be required for mercury control. Activated carbon injection (ACI) is expected to be a key tool for achieving these reductions; however, typical performance data with ACI suggest that in-flight mercury capture becomes exponentially more difficult at high reduction levels. Because of this decreasing sensitivity of mercury capture to carbon injection rate, ACI parameters will need to be optimized in order to consistently achieve high reduction targets. Unfortunately, optimization data may not exist for a number of plants since existing site-specific data may have been collected with outdated mercury capture targets in mind, and the ultimate capture potential or its sensitivity to plant operations was not thoroughly examined. To add to this dilemma, optimizing the maximum mercury reduction with ACI is not a trivial matter since there are number of potential bottlenecks that can limit overall capture. These restrictions range from insufficient sorbent distribution and contact time in the flue gas, to one of many kinetic limitations that arise under the conditions encountered in flue gas. This presentation will discuss the common mechanisms that limit mercury capture with ACI, as identified through fundamental study of mercury–carbon interactions and analysis of pilot and field data. Recognizing the typical trends with mercury capture can assist in the selection of ACI parameters that are most likely to achieve high reductions that may be mandated in the near future.

Revision Date:  5/11/2011

Tags:  221112 - Fossil Fuel 化石燃料, Energy & Environmental Research Center, Activated Carbon Injection System, Air Quality, USA