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Carbon supported vanadia for multi-pollutants removal from flue gas

机译：碳载钒可去除烟道气中的多种污染物

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摘要

Coal combustion generates flue gas that contains many types of pollutants including sulfur dioxide (SO_2), nitrogen oxides (mainly NO) and heavy metals (Hg, Pb, As, etc.). Abatement of these pollutants has been an important task for sustainable development of the world, especially of the countries heavily relying on coal as the main primary energy. The dominant flue gas cleaning technologies used worldwide today are effective only for a single pollutant removal at conditions significantly different from each other and from that of flue gas emission. This inevitably leads to high cost for multi-pollutants removal. Research in past decades showed that carbon supported catalysts have superior properties for abatement of many flue gas pollutants, individually or simultaneously, at temperatures of flue gas emission. Among them, activated coke supported vanadia (V_2O_5/AC) attracted more attention due to its high activities in adsorption and oxidation, which are key properties needed for abatement of these pollutants. This article, as a plenary lecture of the 8th International Symposium on Gas Cleaning at High Temperatures (GCHT-8), is mainly a feature report that summarizes the main research on V_2O_5/AC catalyst for SO_2, NO and Hg removal, especially the contributions made by Chinese researchers. It concentrates on in-depth understanding on surface science and catalysis, including the role of V_2O_5 in adsorption and oxidation of the pollutants; effects of SO_2 and moisture on formation and consumption of poisonous sulfates; the role of AC in adsorption and oxidation of the pollutants and in decomposition of poisonous sulfates; the forms of intermediates and their transformation mechanism; and effects of alkali species in flue gas on activities of SO_2 and NO removal.
机译：燃煤产生的烟道气包含多种类型的污染物，包括二氧化硫（SO_2），氮氧化物（主要是NO）和重金属（Hg，Pb，As等）。消除这些污染物一直是世界可持续发展的一项重要任务，特别是那些严重依赖煤炭作为主要主要能源的国家。当今世界范围内使用的主要烟道气清洁技术仅在相互之间以及烟道气排放条件明显不同的条件下有效去除单一污染物。这不可避免地导致去除多种污染物的高成本。过去几十年的研究表明，碳载体催化剂具有优异的性能，可在烟气排放温度下单独或同时消除许多烟气污染物。其中，活性炭负载的钒（V_2O_5 / AC）因其高的吸附和氧化活性而备受关注，这是消除这些污染物所需的关键特性。这篇文章作为第八届国际高温气体清洁研讨会（GCHT-8）的全体演讲，主要是一篇功能报告，总结了V_2O_5 / AC催化剂用于SO_2，NO和Hg去除的主要研究，特别是其贡献由中国研究人员制成。它集中于对表面科学和催化的深入理解，包括V_2O_5在污染物的吸附和氧化中的作用； SO_2和水分对有毒硫酸盐形成和消耗的影响； AC在污染物的吸附和氧化以及有毒硫酸盐的分解中的作用；中间体的形式及其转化机制；烟气中碱类物质对SO_2和NO去除活性的影响

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  • 来源
    《Fuel》 |2013年第6期|149-158|共10页
  • 作者

    Qingya Liu; Zhenyu Liu;

  • 作者单位

    State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing 100029, China;

    State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Beijing 100029, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    V_2V_5; activated carbon; flue gas pollutants removal; SO_2; NO;

    机译：V_2V_5;活性炭;烟气污染物去除;SO_2;没有;

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