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Integrated management of ash from industrial and domestic combustion : a new sustainable approach for reducing greenhouse gas emissions from energy conversion

机译:工业和家庭燃烧产生的灰分的综合管理:减少能源转换产生的温室气体排放的可持续新方法

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摘要

This work supports, for the first time, the integrated management of waste materials arising from industrial processes (fly ash from municipal solid waste incineration and coal fly ash), agriculture (rice husk ash), and domestic activities (ash from wood biomass burning in domestic stoves). The main novelty of the paper is the reuse of wood pellet ash, an underestimated environmental problem, by the application of a new technology (COSMOS-RICE) that already involves the reuse of fly ashes from industrial and agricultural origins. The reaction mechanism involves carbonation: this occurs at room temperature and promotes permanent carbon dioxide sequestration. The obtained samples were characterized using XRD and TGA (coupled with mass spectroscopy). This allowed quantification of the mass loss attributed to different calcium carbonate phases. In particular, samples stabilized using wood pellet ash show a weight loss, attributed to the decomposition of carbonates greater than 20%. In view of these results, it is possible to conclude that there are several environmental benefits from wood pellet ash reuse in this way. In particular, using this technology, it is shown that for wood pellet biomass the carbon dioxide conversion can be considered negative.
机译:这项工作首次支持对工业过程(城市固体废物焚烧产生的粉煤灰和煤粉煤灰),农业(稻壳灰)和家庭活动(木屑燃烧产生的灰分)产生的废物进行综合管理。家用炉灶)。本文的主要新颖之处在于通过应用一种新技术(COSMOS-RICE)来重新利用木屑灰分,这是一个被低估的环境问题,该技术已经涉及到对工业和农业来源的粉煤灰的重复利用。反应机理涉及碳酸化:这发生在室温下并促进永久性的二氧化碳隔离。使用XRD和TGA(与质谱联用)对获得的样品进行表征。这允许量化归因于不同碳酸钙相的质量损失。特别是,使用木屑灰稳定的样品显示出重量损失,这归因于碳酸盐的分解大于20%。根据这些结果,可以得出这样的结论:木屑灰分的再利用对环境有好处。特别地,使用该技术表明,对于木屑生物质,二氧化碳转化率可以认为是负的。

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