0557087 - ÚCHP 2023 RIV GB eng J - Journal Article
Szeliga, Z. - Honus, S. - Vávrová, Z. - Jirsa, P. - Veselý, Václav - Čárský, Milan - Vujanovic, M. - Regucki, P. - Krzyzynska, R.
Effect of HCl on a sorption of mercury from flue gas evolved during incineration of hospital waste using entrained flow adsorbers.
Waste Management. Roč. 140, Mar 1 (2022), s. 74-80. ISSN 0956-053X. E-ISSN 1879-2456
R&D Projects: GA TA ČR(CZ) TN01000048
Institutional support: RVO:67985858
Keywords : activated carbon * hospital waste * incineration * flue gas
OECD category: Chemical process engineering
Impact factor: 8.1, year: 2022 ; AIS: 1.248, rok: 2022
Method of publishing: Open access with time embargo
DOI: https://doi.org/10.1016/j.wasman.2022.01.001

Small incinerators of dangerous wastes, including those from hospitals, are a source of emissions of highly variable compositions and concentrations. Mercury is a very dangerous pollutant causing neurotoxicity in human organism. The effect of HCl concentration on adsorption of mercury on activated carbon-based sorbent was studied for the incineration of hospital waste in a 250 kg/h capacity unit. The maximum concentration of adsorbed mercury on activated carbon was determined as a function of concentration of Hg and HCl in combustion products. Based on the expected chemical reactions and the thermodynamics, the adsorption of mercury from flue gases in oxidising atmosphere has been explained. The activated carbon-based sorbent was also capable of adsorbing acid gases like HCl. The efficiency of removal of mercury from combustion products increased up to 85-87% with the concentration of HCl in flue gases. The addition of calcium hydroxide increased the amount of mercury trapped on the sorbent only by about 10%. These tests proved that an entrained flow adsorber is a suitable unit for the removal of mercury from combustion products. The consumption of activated carbon for the mercury removal was from 0.1 to 0.15 mg/Nm3 of flue gas. The advantage of an entrained flow adsorber lies in its easy continuous operation. Therefore, it is a suitable unit for small and medium size incinerators of municipal and hospital waste.
Permanent Link: http://hdl.handle.net/11104/0331196