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首页> 外文期刊>Catalysis science & technology >Outstanding performance of CuO/Fe-Ti spinel for Hg-0 oxidation as a co-benefit of NO abatement: significant promotion of Hg-0 oxidation by CuO loading
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Outstanding performance of CuO/Fe-Ti spinel for Hg-0 oxidation as a co-benefit of NO abatement: significant promotion of Hg-0 oxidation by CuO loading

机译：杰出的性能措/ Fe-Ti尖晶石Hg-0氧化的金额没有减轻:显著促进Hg-0氧化措加载

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摘要

Conversion of gaseous Hg-0 to soluble Hg2+ using selective catalytic reduction (SCR) catalysts with gaseous HCl as an oxidant as a co-benefit of NO abatement is widely used for resolving Hg pollution from coal-burning power plants. Nevertheless, the performances of conventional V2O5-WO3/TiO2 for NO abatement and Hg-0 oxidation are unsatisfactory. In this study, CuO/Fe-Ti spinel was exploited as a novel and high-activity catalyst for the simultaneous removal of NO and Hg-0. The outstanding SCR activity and high N-2 selectivity of Fe-Ti spinel did not distinctly decrease after CuO loading; thus, CuO/Fe-Ti spinel achieved efficient NO reduction. Although Hg-0 physical adsorption onto Fe-Ti spinel was slightly suppressed after CuO loading, the Cl* radical formation was appreciably promoted as both HCl adsorption and the conversion of adsorbed Cl- to Cl* radicals were promoted. Hence, the Hg-0 oxidation activity of Fe-Ti spinel was appreciably improved after CuO loading, and the rate of Hg-0 oxidation for CuO/Fe-Ti spinel reached approximately 6.8-8.7 mu g g(-1) min(-1), which was better than those of most other SCR catalysts. In summary, CuO/Fe-Ti spinel shows great promise as an SCR catalyst for Hg-0 oxidation as a co-benefit of NO abatement from coal-burning flue gas (CFG).
机译：气态Hg-0转换成可溶性Hg2 +使用选择性催化还原(SCR)催化剂与盐酸气体作为氧化剂的金额没有广泛用于解决Hg减排燃煤电厂污染物。然而,传统的表演V2O5-WO3 /二氧化钛没有减轻,Hg-0氧化是不满意的。尖晶石是利用小说和高度活跃的同时删除没有和催化剂Hg-0。Fe-Ti尖晶石的选择性没有明显措加载后降低;尖晶石实现效率没有降低。Hg-0物理吸附到Fe-Ti尖晶石稍微抑制措加载后,Cl *激进的形成是明显提升HCl吸附和转换吸附Cl - Cl *激进分子得到晋升。因此,Fe-Ti Hg-0氧化活性尖晶石措后明显改善加载和Hg-0氧化的速度措/ Fe-Ti尖晶石达到大约6.8 - -8.7亩g g(1)分(1),这是更好的比其他大多数SCR催化剂。尖晶石作为SCR催化剂显示了巨大的希望Hg-0氧化的金额没有减轻从燃煤烟气(CFG)。

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