Fundamental Adsorption Characteristics of Carbonaceous Adsorbents for 1,2,3,4-Tetrachlorobenzene in a Model Gas of an Incineration Plant

Abstract

Carbonaceous adsorbents such as activated carbon have been used to reduce the emission of organic pollutants from incineration plants. However, with this method, the amount and type of adsorbent to be used are based only on empirical results, which may lead to overuse of the adsorbents. The fundamental adsorption characteristics of several kinds of activated carbon, activated coke, and carbide wood were examined using 1 ,2,3,4-tetrachlorobenzene as an adsorbate. The removal performance and various equilibrium adsorption characteristics of these adsorbents were analyzed using laboratory-scale adsorption equipment. The equilibrium adsorption amount increased by a factor of 1.9-3.2 at 150 degrees C compared with that at 190 degrees C. The effect of the moisture content on adsorption capacity was relatively small in comparison with that of the temperature. The micropore volume for pore diameters of 2 nm or less was the most important factor governing the adsorption capacity for all adsorbents. Activated carbon showed superior adsorption ability compared to activated coke and carbide wood, although all adsorbents were sufficient for practical use.

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

“…The differences in dioxin properties should be considered in assessing the dioxin removal by carbon adsorption. Dioxin distribution between solid and vapor phases in the flue gas is related to the congener vapor pressure [31]. Generally lower chlorinated congeners with higher vapor pressures have higher gaseous fractions at a specific temperature compared to highly chlorinated congeners.…”

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

“…According to previous studies (Nagano et al, 2000;Inoue and Kawamoto, 2005;Chi et al, 2006;Zhou et al, 2014), there are three main factors of adsorbent to effect the remove efficiency: (1) Mesopores volume. A higher mesopores volume increases the adsorption ability of PCDD/Fs and facilitates the internal diffusion of PCDD/F-molecules.…”

Reduction of hazardous elements contained in sewage sludge incineration ash

“…Specific surface area and pore volume of the ash were measured using the BELLSORP-mini after vacuum deaeration for 8 h at 120°C. The specific surface area was obtained by the BET method from nitrogen adsorption isotherms [9][10][11]. The pore volumes for pore diameters of 0.42-2 nm and 2.6-200 nm were calculated by the MP and BJH methods, respectively [12,13], from nitrogen adsorption and desorption isotherms.…”