Multi-component behavior of fixed-bed adsorption of dioxins by activated carbon fiber

Minimum feeding rate of activated carbon to control dioxin emissions from a large-scale municipal solid waste incinerator

“…There were a total of 24 tests, as listed in Table 5, which summarize all experimental conditions and experimental results in this study. From the experimental results, the addition of activated carbon would promote total dioxin removal, but it did not significantly modify the congener fingerprint [10,12], although furans seemed to be removed more efficiently than dioxins, as reported by Karademir et al [13] and Tejima et al [16].…”

“…There are a lot of previous researches about dioxin removal efficiency by ACI [12,27,28,29]. Unfortunately, a few of the published papers provided exact F/Q data, or showed the relation between dioxin removal efficiency and F/Q.…”

“…Chromatographic separation was achieved with a DB-5 (J&W Scientific, CA, USA) fused-silica capillary column (60 m × 0.25 mm ID, 0.25 m film thickness) with helium as the carrier gas, in the splitless injection mode (1-2 l). The temperature program for chromatographic separation was: 140-200 • C (1 min) at 20 • C/min, then at 3 • C/min to 300 • C and held isothermally for 20 min at 300 • C. Toxic equivalents quantity (TEQ), such as, 2,3,7,8-TCDD were calculated using international toxicity equivalency factors (I-TEF), and confirmation analysis (as required for the 2378-TCDF) were carried out to give the correct data due to using DB-5 fused-silica capillary column as suggested by Mori et al [12] and Ryan et al [25]. The quality criteria were based on quality control (QC) and quality assurance (QA) measures required by Taiwan NIEA A808.72B and NIEA M801,11B.…”

“…Variations in the dosing rate and the use of different adsorbents, as well as the operating temperature, were used to identify the selection criteria for determining the optimum process-engineering conditions for flue gas cleaning. Mori et al [12] studied the multi-component behavior of dioxin adsorption using AC filters. They found that the transfer rate in the adsorption of dioxin isomers tends to increase with decreasing numbers of chlorine substituents, and thus affects adsorption overall efficiency of AC.…”

The Possibilities of Reduction of Polychlorinated Dibenzo-P-Dioxins and Polychlorinated Dibenzofurans Emission

“…The carbon used is the most frequently directed to combustion taking place in waste incineration plant. Another variation may be the application of adsorbers with fluidized bed [62] l or with monolithic static, packed bed [63]. The stream absorption is connected with the introduction of certain amounts of powdered active carbon (sometimes in the mixture with powdery calcium oxide known as Sorbalit, Sorbacal, Spongiacal, etc.)…”