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首页> 外文会议>Developments in strategic materials and computational design V >AIR PLASMA SPRAYED CATALYTIC COATINGS FOR DENOX APPLICATIONS
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AIR PLASMA SPRAYED CATALYTIC COATINGS FOR DENOX APPLICATIONS

机译：DENOX应用的空气等离子喷涂催化剂涂料

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The selective catalytic reduction (SCR) of NOx by ammonia is the best-developed and most widely applied method for removing those pollutants present within the flue gases of fossil fuelled power plants and engines. Commercial catalysts are mainly composed of TiO_2, WO_3 and V_2O_5 plus other compounds without catalytic function. TiO_2 in the anatase form acts as high specific surface support material and shows the most effective dispersive capacity for the catalytically active phases (V_2O_5 and WO_3). Nowadays the installation of SCR DeNOx plants is usually limited to coal, oil and waste fired power plants. In fact, NOx emissions of natural gas combined cycles are still below the threshold fixed by the law but if this threshold will be further reduced, combined cycles will have to be equipped with DeNOX plants or with very low NOx burners. On the other hand, to upgrade the existing plants, a retrofitting technology is required. In this perspective, a possible solution would consist in depositing a catalytic coating on heat exchange pipes in the heat recovery steam boiler of combined cycle power plants in the region where the temperatures of flue gases are within the range of operation of the catalyst. In this work, different morphologies of precursors and microstructure of coatings have been investigated and the catalytic reduction efficiency of coating has been evaluated to select the best solution. The first results of the development of air plasma sprayed catalytic coatings will be presented.
机译：氨对NOx的选择性催化还原（SCR）是最先进，应用最广泛的方法，用于去除化石燃料发电厂和发动机的烟道气中存在的那些污染物。商业催化剂主要由TiO_2，WO_3和V_2O_5以及其他没有催化功能的化合物组成。锐钛矿形式的TiO_2作为高比表面载体材料，对催化活性相（V_2O_5和WO_3）显示出最有效的分散能力。如今，SCR脱硝工厂的安装通常仅限于燃煤，石油和废料发电厂。实际上，天然气联合循环的NOx排放量仍低于法律规定的阈值，但如果进一步降低此阈值，则联合循环必须配备DeNOx装置或极低的NOx燃烧器。另一方面，为了升级现有的工厂，需要翻新技术。从这个角度来看，可能的解决方案是在烟气温度在催化剂工作范围内的区域内，在联合循环发电厂的热回收蒸汽锅炉中的换热管上沉积催化涂层。在这项工作中，研究了涂层的前体的不同形态和涂层的微观结构，并评估了涂层的催化还原效率以选择最佳溶液。将介绍空气等离子喷涂催化涂层开发的最初结果。

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  • 会议地点 Daytona Beach FL(US)
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    A. Moscatelli; F. Cernuschi; M. Notaro; S. Capelli;

  • 作者单位

    Flame Spray S.p.A., Via Da Vinci, 30 - 20877 Roncello (MB), Italy;

    RSE- Ricerca sul Sistema Energetico, Via Rubattino, 54 - 20134 Milano, Italy;

    RSE- Ricerca sul Sistema Energetico, Via Rubattino, 54 - 20134 Milano, Italy;

    RSE- Ricerca sul Sistema Energetico, Via Rubattino, 54 - 20134 Milano, Italy;

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