Novel super-absorbent polymer-grafted tea polyphenol composite inhibitor for the prevention of coal spontaneous combustion
Zhian Huang
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou, China
State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo, China
Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines (Hunan University of Science and Technology), Xiangtan, China
Search for more papers by this authorYe Tian
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorCorresponding Author
Zhenlu Shao
Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou, China
Correspondence
Zhenlu Shao, Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Yukun Gao
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Correspondence
Zhenlu Shao, Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China.
Email: [email protected]
Search for more papers by this authorYinghua Zhang
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorJinyang Li
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorHongyu Zhu
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorZhian Huang
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou, China
State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo, China
Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines (Hunan University of Science and Technology), Xiangtan, China
Search for more papers by this authorYe Tian
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorCorresponding Author
Zhenlu Shao
Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou, China
Correspondence
Zhenlu Shao, Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Yukun Gao
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Correspondence
Zhenlu Shao, Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China.
Email: [email protected]
Search for more papers by this authorYinghua Zhang
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorJinyang Li
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorHongyu Zhu
State Key Laboratory of High-Efficient Mining and Safety of Metal Mines (University of Science and Technology, Beijing), Ministry of Education, Beijing, China
Search for more papers by this authorFunding information: Fundamental Research Funds for the Central Universities, Grant/Award Number: FRF-IC-19-013; Fundamental Research Funds for the Central Universities (China University of Mining and Technology), Grant/Award Number: 2017CXNL02; National Key Research and Development Program of China, Grant/Award Number: 2018YFC0810600; National Natural Science Foundation of China, Grant/Award Numbers: 51474017, 51904292, 51974015; Natural Science Foundation of Jiangsu Province of China, Grant/Award Number: BK20180655; State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), Grant/Award Number: WS2018B03; Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for the Southern Coal Mines of China (Hunan University of Science and Technology), Grant/Award Number: E21724
Summary
Aiming at the problems that the existing coal spontaneous combustion physical inhibitor has the disadvantages of short retarding time and low blocking efficiency, the novel super-absorbent polymer-grafted tea polyphenol composite inhibitor is prepared based on analyzing the advantages and disadvantages of various kinds of inhibitors. The orthogonal test was carried out with the water-absorbent as the assessment index, and the optimum formulation of the composite inhibitor was obtained: the degree of neutralization was 90%, the amount of initiator was KPS (Potassium peroxydisulfate)/AA (Acroleic acid) = 1.2%, and the amount of cross-linking agent was MBA (N,N' Methylene diene amide)/AA = 0.4%. The experimental results show that the temperature of the cross-point of the coal sample treated by obtained composite inhibitor increased by 18°C compared with the raw coal, and the crossing point temperature delayed by 37 minutes, the activation energy increased by 38.552 kJ/mol. The further mechanism analysis shows that the inhibitor has good water-retaining and water-absorbing property. The function of cooling by absorbing heat, covering coal and insulating oxygen, and also inhibiting the oxidation activity of the coal molecule can effectively inhibit the spontaneous combustion of the coal.
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