Journal
POWDER TECHNOLOGY
Volume 356, Issue -, Pages 263-272Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2019.08.039
Keywords
SDS; Acid treatment; Functional group; Mineral components; Combustion characteristic
Categories
Funding
- National Key Research and Development Program of China [2017YFC0805201]
- National Natural Science Foundation of China [51704186, 51704179]
- key research and development Plan of Shandong Province, China [2018GSF116010]
- Major Program of Shandong Province Natural Science Foundation [ZR2018ZA0602]
- Shandong Province Natural Science Foundation, China [ZR2016EEQ18, ZR2016EEP02]
- China Postdoctoral Science Foundation [2017M622235]
- Science and Technology Program of Shandong Province University [J15LH02]
- Shandong Province Postdoctoral Innovation Project [201703025]
- Qingdao Postdoctoral Researcher Applied Research Project
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In order to enhance the effect of acidizing coal seam with the compound solution, in this paper, the chemical characteristics of treated coal samples were analyzed, including proximate analysis, functional groups, mineral components and microcrystalline structures. The results show that acidification synergism of SDS reduces the ash content in the coal, and significantly increases the volatile component, fixed carbon content and low calorific value. The addition of SDS increases the content of hydrogen groups and hydroxyl groups. Acidification synergism of SDS reduces the degree of fatty chain length and the degree of branching (d(fc-b)) in the coal samples. Besides, in terms of microcrystalline structure, addition of the SOS has a large influence on the parameters the average diameter of the aromatic layer (L-a) and the stacking height of the aromatic layer (L-c). The results of this paper are great significance for studying the mechanism of chemical properties of acidified coal. (C) 2019 Published by Elsevier B.V.
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