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- W4229443381 endingPage "124417" @default.
- W4229443381 startingPage "124417" @default.
- W4229443381 abstract "• The quartz filler with appropriate size can promote the HTD of HgCl 2 (g). • The presence of active Cl atoms is a crucial factor hindering the HTD of HgCl 2 (g). • Cl atoms and O can promote the generation of HgO with intermediates ClO, which is a vital transition product for Hg 0 re-oxidation. • A rapid cooling process can avoid the hazard of Hg 0 (g) re-oxidation by chlorine species. The reduction of gaseous oxidized mercury Hg 2+ (g) to elemental mercury Hg 0 (g) is a key technology to obtain the total flue gas mercury in the mercury continuous emission monitoring system (Hg-CEMS). Investigation of the reduction of HgCl 2 (g) to Hg 0 (g) in the high-temperature decomposition (HTD) was conducted with/without oxidative components in a fixed bed reactor. The chemical reaction path was discussed in-depth by thermodynamic calculation and theoretical analysis. The results show that the higher the temperature, the higher the efficiency of HgCl 2 (g) reduction. The chlorine species produced in the HTD process inhibit the conversion rate because of re-oxidation on Hg 0 (g). For eliminating the negative effect of Cl radicals and promoting the reactive sites, a quartz filler with appropriate size demonstrates a good performance for enhancing the decomposition of HgCl 2 (g). However, the presence of O 2 and HCl leads to the complete failure of HgCl 2 (g) HTD because O 2 greatly promotes the combination of Hg 0 (g) with chlorine. Compared with HCl molecules, Cl atoms are more active in thermodynamic favor in speeding up re-oxidation of Hg 0 (g). Active Cl atoms are the most crucial factor hindering HTD reaction due to their high reaction initiative and low activation energy." @default.
- W4229443381 created "2022-05-11" @default.
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- W4229443381 date "2022-09-01" @default.
- W4229443381 modified "2023-10-06" @default.
- W4229443381 title "Reduction of HgCl2 to Hg0 in flue gas at high temperature. Part Ⅰ: Influences of oxidative species" @default.
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- W4229443381 doi "https://doi.org/10.1016/j.fuel.2022.124417" @default.
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