Experimental Study of the Pore Structure during Coal and Biomass Ash Sintering Based on X-ray CT Technology,Energy & Fuels

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Experimental Study of the Pore Structure during Coal and Biomass Ash Sintering Based on X-ray CT Technology
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-01-25 , DOI: 10.1021/acs.energyfuels.0c03668
Zhaowen Wang ₁ , Hao Zhou ₁ , Yuan Li ₁ , Pingan Zhang ₁ , Rui Mao ₁ , Liming Ren ₁ , Jiawei Luo ₁

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This paper explores the evolution of pore structure parameters during Zhundong coal and biomass ash sintering at 1473 K. Additionally, the influences of blending biomass ash with different proportions are determined. The pore parameters, including the porosity, diameter, number, and frequency of the equivalent diameter, were processed by reconstructing and processing three-dimensional (3D) data on the basis of X-ray computed microtomography (XCT). The maximum porosities for the cases of pure coal and mixture of 10% biomass and 50% biomass during sintering are determined to be 46.6, 42.6, and 24.0%, respectively, while the frequencies of small pores (<0.2 mm) in the coal ash samples are lower than those in the other cases. In addition, the mineralogical phase transformation during sintering is identified by X-ray diffraction analysis. The condensate in the pores mainly comprises NaCl, CaSO₄, and KCl, which indicates that the volatilization of alkali metals and the formation and gasification of anhydrite occur throughout the sintering process.

中文翻译：

基于X射线CT技术的煤与生物灰烧结孔结构的实验研究。

本文探讨了准东煤和生物质灰分在1473 K烧结过程中孔隙结构参数的变化。此外，还确定了不同比例混合生物质灰分的影响。通过基于X射线计算机断层扫描（XCT）重建和处理三维（3D）数据来处理孔隙参数，包括孔隙率，直径，数量和等效直径的频率。在烧结过程中，纯煤以及10％生物质和50％生物质混合物的最大孔隙率分别确定为46.6、42.6和24.0％，而煤灰中的小孔（<0.2 mm）频率样本低于其他情况。另外，通过X射线衍射分析鉴定了烧结期间的矿物相变。_图4和KCl表明在整个烧结过程中碱金属的挥发以及硬石膏的形成和气化。

更新日期：2021-02-04

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