Abstract
Mineral contents in two Zhundong coals and PRB coal were determined by XRF (X-ray fluorescence), XRD (X-ray diffraction) and TG-DSC (thermo gravimetry–differential scanning calorimetry). Effect of ashing temperature was assessed by comparing ash element compositions and mineral patterns at three temperature levels. Element compositions of the ashes showed that Zhundong coals have higher slagging and fouling tendency than PRB coal. It was also found that quartz and kaolinite are main mineral patterns in Zhundong coals and PRB coal. Quartz barely changes with ashing temperature because of its high reaction and melting temperature. Kaolinite begins to dehydrate at ~673 K and then decomposes as temperature further increases. The mineral patterns strongly depend on ashing temperature because of the different reactions among minerals. Based on the mineral pattern and transformation analyses using TG-DSC, calcite was the main form of calcium in one Zhundong coal, while anhydrate was the main form of calcium in the other Zhundong coal and PRB coal.
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Acknowledgments
This work was supported by 863 project of Chinese Ministry of Science and Technology (No. 2015BAA04B01) and CAS Project (No. XDA04020202-09).
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© 2016 Springer Science+Business Media Singapore and Tsinghua University Press
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Yang, Y., Zhang, H., Lu, J., Wu, Y. (2016). Mineral Matters in High-AAEM Zhundong Coal—In Comparison with High-calcium PRB Coal. In: Yue, G., Li, S. (eds) Clean Coal Technology and Sustainable Development. ISCC 2015. Springer, Singapore. https://doi.org/10.1007/978-981-10-2023-0_10
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DOI: https://doi.org/10.1007/978-981-10-2023-0_10
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