Abstract: Fe(NO3)3, Fe2(SO4)3 and FeCl3 solutions are respectively used to remove sulfur from a kind of coking coal produced in a certain coal mine in Shanxi province, China.Effects of the type of ferric salt and the addition of inorganic acids on the desulfurization are investigated.In addition, FT-IR is employed to characterize and compare the coal samples before and after the desulfurization.Results show that the desulphurization effectiveness by Fe(NO3)3 is significantly higher than that by Fe2(SO4)3 and FeCl3;the addition of H2SO4 or HCl will restrain the desulfurization ability of Fe3+;HNO3 with a lower concentration can improve the removal efficiency of pyrite, thioalcohol and thioether from coal by Fe(NO3)3, while HNO3 with a higher concentration will inhibit the reaction between Fe3+ and FeS2, resulting in a lower desulfurization efficiency.
范乐珍, 唐佩瑶, 李钰涵, 魏凤玉. 阴离子对铁盐氧化脱除煤中硫的影响[J]. 现代化工, 2022, 42(6): 153-155,161.
FAN Le-zhen, TANG Pei-yao, LI Yu-han, WEI Feng-yu. Effect of anion on removal of sulfur from coal by ferric salt oxidation. Modern Chemical Industry, 2022, 42(6): 153-155,161.
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