In Situ Decoration of Selenide on Copper Foam for the Efficient Immobilization of Gaseous Elemental Mercury

Abstract

Mercury emission from industrial activities is a great threat to public health and ecosystems. Developing new strategies and materials to remove mercury still remains a serious task. Herein, selenide-decorated copper foam prepared by a heating-stirring method (Cu-hs) was used as a monolithic mercury adsorption material. The Cu-hs exhibited much better adsorption of elemental mercury (Hg 0 ) compared with the selenidedecorated cordierite honeycomb prepared by the same method (Cordierite-hs). Nearly 100% Hg 0 adsorption efficiency was obtained under a high gaseous hourly space velocity of 6.0 × 10 4 . Excellent Hg 0 adsorption capacity was obtained in a wide range of reaction temperatures from 40 to 120 °C, suggesting the good adaptability of Cu-hs in different operating conditions. The Cu-hs exhibited high selectivity for Hg 0 against H 2 O and SO 2 , which is advantageous for real applications in industrial flue gas. The Hg 0 adsorption capacity of Cu-hs reached 3743 g/m 3 , about 14 times higher than the 243 g/m 3 of Cordierite-hs. The excellent Hg 0 adsorption performance of Cu-hs was attributed to the high affinity of the selenium in Cu 2 Se for mercury, the homogeneous distribution of Cu 2 Se, and the superior fluid characteristics of the Cu foam substrate. The adsorption performance of the spent Cu-hs could be effectively recovered by HCl solution leaching and subsequent reselenization. The utilization of recyclable Cu-hs provides a cost-effective and environmentally friendly method for removing mercury from industrial flue gas.

Enhancement of CeO2modified commercial SCR catalyst for synergistic mercury removal from coal combustion flue gas

“…NO could be oxidized by chemisorbed oxygen on the catalyst to NO 2 which had the capacity to oxidize Hg 0 to Hg(NO 3 ) 2 . 47 The related reactions were presented by eqn (11) and (12). And it was the reason for the improvement of the Hg 0 removal efficiency with the raise of NO concentration.…”

“…10,11 Compared with other Hg removal plans such as sorbent injection, utilizing SCR catalyst to synergistically remove Hg is remarkably cost-effective and meanwhile benecial to the avoiding of secondary mercury pollution. 12 Hence, it is promising for coal-red power plant to adopt this approach to deal with the Hg removal from ue gas. And the research on the synergistic Hg 0 oxidation with SCR catalyst has attracted more attention in recent years.…”

Research on the Impact of Carbon Tax on CO2Emissions of China’s Power Industry

“…It is widely used in the study of energy environmental economic policies. e energy technology model is a large dynamic energy optimization model developed by international research institutions that is widely used in research on energy system optimization and emission reduction at the national, regional, and industry levels [25]. Compared with the energy technology model, the energy economy model focuses on the connection between the energy sector and other sectors but does not analyze the technical factors of the internal energy system.…”

Photocatalytic removal of elemental mercury via Ce-doped TiO2 catalyst coupling with a novel optical fiber monolith reactor

“…Coal combustion flue gas is a complex mixture of O 2 , CO 2 , H 2 O, NO x , SO 2 , HCl, and so on (Yang et al 2018a;Yang et al 2020). The role of various flue gas components in Hg 0 removal has been extensively reported in literatures.…”