碳粉煤灰的结构、形态和物理特性

IF 0.7 Q4 CHEMISTRY, MULTIDISCIPLINARY
Ricardo Parra, C. Carvajal, J. G. Cuaspud
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引用次数: 0

摘要

粉煤灰(CFA)是用于发电的燃烧化石燃料(煤燃烧)产生的主要工业废物副产品。CFA是一种灰色或黑色的粉末状固体,主要由金属氧化物(Al、Si-Fe和Ca)、未燃烧的碳(UC)和其他无机物质组成。因此,鉴于粉煤灰的处置需要大面积的土地,并且可能造成空气、水、土地污染和对人类健康的影响,粉煤灰的管理一直是一个令人关切的问题。粉煤灰的物理和化学特性很重要,因为这些特性会影响其后续的使用和处理。X射线衍射、荧光、扫描显微镜和能量色散光谱、FTIR、BET是表征FA的常用技术。通过XRD分析鉴定了石英、莫来石和硅线石相的存在;而FTIR结果允许识别振动带、Si-O-Si和Si-O键的特征。EDS分析与SEM相结合,可以验证样品的成分与所寻求的结果一致,并且形态特征验证了所提出的方法。表面积分析(BET)表明,粉煤灰的活性面积为6.02m2·g-1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural, Morphological and Physical Characterization of Carbon Fly Ash
Carbon fly ash (CFA) is the principal industrial waste byproduct from the burning fossil fuel (coal combustion) for the thermal generation of electricity. CFA is a gray or black powdery solid that is constituted mostly metal oxides (Al, Si Fe and Ca), unburned carbon (UC) and other inorganic substance. The management of fly ash has thus been a matter of concern given the requirement of the large area of land for its disposal and potential of causing pollution of air, water, land and effects on human health. Physical and chemical characteristics of fly ash is important, as these characteristics influence its subsequent use and disposal. X-ray diffraction, and fluorescence, scanning microscopy with an energy dispersive spectroscopy, FTIR, BET was the common techniques employed to characterize FA. Characterization by XRD analysis identified the presence of quartz, mullite and sillimanite phases; while the FTIR results allowed the identification of vibrational bands, characteristic of Si-O-Si and Si-O bonds. The EDS analysis coupled to SEM allowed verifying that the composition of the samples is consistent with the results sought and that the morphological characteristics validate the proposed methodology. Surface area analyses (BET) showed that the fly ash possess an active area of 6.02 m2 · g-1.  
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来源期刊
Orbital: The Electronic Journal of Chemistry
Orbital: The Electronic Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
1.10
自引率
0.00%
发文量
25
审稿时长
10 weeks
期刊介绍: Orbital: The Electronic Journal of Chemistry is a quarterly scientific journal published by the Institute of Chemistry of the Universidade Federal de Mato Grosso do Sul, Brazil. Original contributions (in English) are welcome, which focus on all areas of Chemistry and their interfaces with Pharmacy, Biology, and Physics. Neither authors nor readers have to pay fees. The journal has an editorial team of scientists drawn from regions throughout Brazil and world, ensuring high standards for the texts published. The following categories are available for contributions: 1. Full papers 2. Reviews 3. Papers on Education 4. History of Chemistry 5. Short communications 6. Technical notes 7. Letters to the Editor The Orbital journal also publishes a number of special issues in addition to the regular ones. The central objectives of Orbital are threefold: (i) to provide the general scientific community (at regional, Brazilian, and worldwide levels) with a formal channel for the communication and dissemination of the Chemistry-related literature output by publishing original papers based on solid research and by reporting contributions which further knowledge in the field; (ii) to provide the community with open, free access to the full content of the journal, and (iii) to constitute a valuable channel for the dissemination of Chemistry-related investigations.
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