Adsorption of Hg and NO on coal by-products

Advanced Gasification by-Product Utilization

“…However, the Hg capture capacities of A1 and A3 were higher than a specialty carbon developed specifically for Hg adsorption which was used as part of a previous study 22 . The surface area of this specialty carbon was 570 m 2 /g which suggests that high surface areas may not be important.…”

Fabrication of Multifunctional Hybrid Composites Using Fly Ash to Control Environmental Pollutants: A Review

“…In addition, the pore size on the surface of the adsorbent can be changed after adsorption of a certain amount of Hg, producing the optimum pore size (micropores, < 2nm) for adsorbed NOx [138]. Rubel et al [137] also showed that the surface area of adsorbents increased due to adsorption of NOx, as shown in Figure 12. From the above literatures, it can be concluded that unburned carbon concentration in FA plays a decisive role for reducing NOx from air, and the high surface area of FA will further improve the NOx adsorption capacity.…”

“…Lzquierdo et al [30] synthesized Cu and Fe exchange type Y zeolites from FA for removal of NOx from flue gas. Rubel et al [137] also reported that carbon-rich products from combustion ash could decrease NOx emissions and Hg due to ion-pair interactions between NO + and O2 -at the surface of carbon, with subsequent condensation of NO2 in micropores. In addition, the pore size on the surface of the adsorbent can be changed after adsorption of a certain amount of Hg, producing the optimum pore size (micropores, < 2nm) for adsorbed NOx [138].…”

Technology for the Recovery of Fuel and Adsorbent Carbons from Coal Burning Utility Ash Ponds and Landfills

“…None of the pilot products were high in sulfur but SP had a high oxygen level. High carbon, sulfur and oxygen have been shown to be important in a sorbent's Hg capture potential (Hsi et al 2000;Laumb et al 2001;Otanik et al 1988;Vidic et al 1999;Vidic et al 2000;Rubel, et. al.…”

“…Two other important factors in good Hg adsorption on sorbents are the presence of halogens and sufficient surface area for interaction of Hg with the sorbent (Hsi et al 2000;Laumb et al 2001;Otanik et al 1988;Vidic et al 1999;Vidic et al 2000;Rubel, et. al.…”