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- W3157159715 abstract "• Non-thermal plasma accelerates the reaction of H 2 S and SO 2 on activated carbon. • A high sulfur loading was presented in the mixed H 2 S and SO 2 atmosphere . • The Hg 0 removal performance increased greatly after NTP treatment. • Sulfur on the surface of activated carbon reacted with Hg 0 to form stable HgS. Activated carbon (AC) loading sulfur can improve mercury adsorption performance. Fine sulfur clusters can be generated by the H 2 S and SO 2 reaction, but the reaction is extremely slow at ambient temperatures. This study proposes a cost-effective and efficient method for non-thermal plasma (NTP) to accelerate the reactions between H 2 S and SO 2 on AC to improve elemental mercury (Hg 0 ) removal performance. The NTP treatment experiment was carried out on a laboratory-scale dielectric barrier discharge system. The Hg 0 adsorption experiment was conducted via the Tekran Hg CEMS online monitoring device. The results showed that NTP treatment accelerated the reaction of H 2 S and SO 2 . The specific surface area and surface morphology of the AC had no significant changes after NTP treatment. However, the surface of AC was enriched with more sulfur in a very short time. H 2 S and SO 2 presented an optimum mixing ratio of 2:1. NTP exhibited an optimum treatment time and voltage of 1 min and 3 kV, respectively. The Hg 0 removal efficiency was increased by approximately 70% as compared to AC. In addition, the effects of the adsorption temperature and individual flue gas composition were explored. Further X-ray photoelectron spectroscopy analysis and temperature programmed desorption were also performed. Hg 0 adsorption was mainly controlled by chemisorption, wherein the elemental sulfur loaded on AC was the main active site for Hg 0 conversion to mercuric sulfide (HgS)." @default.
- W3157159715 created "2021-05-10" @default.
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- W3157159715 date "2021-11-01" @default.
- W3157159715 modified "2023-09-24" @default.
- W3157159715 title "Acceleration of the reaction of H2S and SO2 by non-thermal plasma to improve the mercury adsorption performance of activated carbon" @default.
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- W3157159715 doi "https://doi.org/10.1016/j.cej.2021.130144" @default.
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