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• W1840776857 abstract "Abstract BACKGROUND A series of active coke‐based adsorbents from different sources, treated with acid‐base, modified by metal compounds and calcined at different temperatures were investigated for SO 2 removal from flue gas. RESULTS The desulfurization performance of the pure active coke was low, but it was improved after treatment with acid‐base, especially HNO 3 . The active coke loaded with 8% Na 2 CO 3 and 7% Cu(NO 3 ) 2 and calcined at 250–350 °C was best for SO 2 removal. Compared with the untreated active coke, the time for which A‐H‐8‐7 maintained DE at 90% increased from 4 min to 40 min and the value of DE of A‐H‐8‐7 increased from 0.131 mmol g ‐1 to 0.526 mmol g ‐1 . The acid‐base treatment was effective in forming rich pore structures and HNO 3 treatment formed carbonyl groups which favored desulfurization. Sodium and copper modification made a large number of unsaturated groups and chelating bonds formed and sodium and copper elements were dispersed adequately and existed as different compounds in the active coke. The active ingredients for desulfurization were different at different calcination temperatures. Cu(NO 3 ) 2 tended to break down into Cu 2 O at higher temperatures. Most adsorption products were sulfate species (SO 4 2‐ ) which combined with supported copper and sodium and then formed Na 2 Cu(SO 4 ) 2 . CONCLUSION Active coke loaded with 8% Na 2 CO 3 and 7% Cu(NO 3 ) 2 and calcined at 250–350 °C showed good performance for SO 2 removal. © 2014 Society of Chemical Industry" @default.
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• W1840776857 date "2014-08-26" @default.
• W1840776857 modified "2023-10-04" @default.
• W1840776857 title "Study on active coke-based adsorbents for SO₂removal in flue gas" @default.
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• W1840776857 doi "https://doi.org/10.1002/jctb.4499" @default.
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