Testing Mercury Uptake

When looking at mercury uptake from a flue gas stream, there are several factors to consider; flue gas composition, temperature, carbon residence time, carbon injection rate, and carbon removal method. This combination of factors can make lab scale modeling difficult. Fixed beds are frequently used instead of spraying carbon into the system which ignores injection rates and removal methods, measuring the mercury removed by saturating the carbon, rather than mercury removed the few seconds the carbon is in the flue gas stream. Similarly gas models are close to live flue gas, but often only contain key gasses and so not contain the full spectrum of gasses from a coal fire or the fly ash in a live system.