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- W2897260518 abstract "Abstract Graphene was used for the enhancement of gaseous elemental mercury (Hg0) catalytic oxidation and adsorption over Mn-based oxides. A series of graphene modified Mn-based and Ce-Mn-based oxides were prepared via a hydrothermal method. Experimental results indicated that Mn-Ce@rGO composite has a Hg0 removal efficiency of 91% at 250 °C which was higher than that or pure MnOx and MnOx@rGO under the same reaction conditions. Hg0 removal efficiency decreased in the absence of O2. The higher SO2 concentration and space velocity resulted in lower Hg0 removal efficiencies. The mechanism study indicated that high valances of Mn4+ and Mn3+ benefit the Hg0 oxidation and the surface oxygen participated in the Hg0 oxidation process. CeO2 supplies sufficient oxygen for mercury surface adsorption. During these processes, graphene-enhanced the catalytic oxidation and adsorption processes through supporting more reaction space, facilitating electron transfer and binding sites. Moreover, the spent materials can be regenerated using a simple thermal-desorption method. Mn-Ce@rGO composite was proved to be a prospective adsorbent for Hg0 removal from coal-fired flue gas." @default.
- W2897260518 created "2018-10-26" @default.
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- W2897260518 date "2019-02-01" @default.
- W2897260518 modified "2023-10-17" @default.
- W2897260518 title "Graphene enhanced Mn-Ce binary metal oxides for catalytic oxidation and adsorption of elemental mercury from coal-fired flue gas" @default.
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- W2897260518 doi "https://doi.org/10.1016/j.cej.2018.10.150" @default.
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