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ABSTRACT
The change in the fractal structure of anthracite mined in Jincheng, China, during high-temperature (1200°C) carbonisation was studied in situ by small-angle X-ray scattering (SAXS) at Beijing Synchrotron Radiation Facility (BSRF). The results show that, during carbonisation, the anthracite structure changes from a pore fractal to a surface fractal and then back to a pore fractal. With increase of temperature, the fractal dimension of the sample presents a trend of rise, decline, rise and decline again, which probably corresponds to the four stages of physical desorption, thermal decomposition, thermal condensation, and residual carbon aging in the process of carbonisation. The pore fractal exists in the initial and final stages, and the surface fractal exists in the middle two stages.
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This article has been republished with minor changes. These changes do not impact the academic content of the article.
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Notes on contributors
Yuexiang Wang
Yuexiang Wang is engaged in research work in the field of coal chemical industry.
Zhihong Li
Zhihong Li is an expert in the field of SAXS.
Jiao Kong
Jiao Kong is engaged in research work in the field of coal chemical industry.
Liping Chang
Liping Chang is an expert in the field of coal chemical research.
Dongfeng Li
Dongfeng Li is engaged in research work in the field of carbon material.
Baoliang Lv
Baoliang Lv is engaged in research work in the field of carbonmaterial and catalyst.