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首页> 外文期刊>Environmental Science & Technology >Suppressing Ammonia Re-Emission with the Aid of the Co_3O_4-NPs@KIT-6 Catalyst in Ammonia-Based Desulfurization
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Suppressing Ammonia Re-Emission with the Aid of the Co_3O_4-NPs@KIT-6 Catalyst in Ammonia-Based Desulfurization

机译：Co_3O_4-NPs @ KIT-6催化剂在氨基脱硫中的抑制氨再排放

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摘要

The re-emission of NH3 and SO2 caused by the decomposition of (NH4)(2)SO3 is a crucial concern in ammonia-based desulfurization. In this study, a novel Co3O4 -NPs@KIT-6 catalyst with a three-dimensional two-helix structure is proposed for converting (NH4)(2)SO3 into (NH4)(2)SO4. The oxidation rate of (NH4)(2)SO3 with the catalyst was 7.5 times that without any catalyst, and this improvement was attributed to appropriately dispersed Co3O4 nanoparticles with a size of 4-10 nm that interacted with the KIT-6 support. Therefore, the number of active sites with substitution and hole defects was substantially increased, which is advantageous for high catalytic activities. Consequently, the amount of NH3 and SO2 re-emission during (NH4)(2)SO3 oxidation was reduced by 43.9%, which considerably reduced potential environmental risks. The results of this study serve to advance ammonia desulfurization by improving the desulfurization efficiency, downsizing the oxidation tank, and generating considerable profit from efficient reclaiming of (NH4)(2)SO4 as a fertilizer.
机译：由（NH4）（2）SO3分解引起的NH3和SO2的再排放是基于氨的脱硫中的关键问题。在这项研究中，提出了一种新颖的具有三维两螺旋结构的Co3O4 -NPs @ KIT-6催化剂，用于将（NH4）（2）SO3转化为（NH4）（2）SO4。 （NH4）（2）SO3在有催化剂的情况下的氧化速率是没有催化剂的情况下的7.5倍，并且这种改善归因于与KIT-6载体相互作用的尺寸合适的Co3O4纳米颗粒，其粒径为4-10 nm。因此，具有取代和空穴缺陷的活性位点的数量大大增加，这对于高催化活性是有利的。因此，在（NH4）（2）SO3氧化过程中，NH3和SO2的再排放量减少了43.9％，这大大降低了潜在的环境风险。这项研究的结果有助于提高氨的脱硫效率，降低氧化罐的尺寸，并通过有效地回收（NH4）（2）SO4作肥料产生可观的利润。

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  • 来源
    《Environmental Science & Technology》 |2019年第22期|13477-13485|共9页
  • 作者

    Qi Tieyue; Wang Lidong; Wang Yuguo; Xing Lei; Zhang Lin; Liu Jie; Xiao Huining; Zhang Shihan;

  • 作者单位

    North China Elect Power Univ Dept Environm Sci & Engn Hebei Key Lab Power Plant Flue Gas Multipollutant Baoding 071003 Hebei Peoples R China;

    Univ New Brunswick Dept Chem Engn Fredericton NB E3C 2G6 Canada;

    Zhejiang Univ Technol Coll Environm Hangzhou 310014 Zhejiang Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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