Inhibition effects of aluminum dust explosions by various kinds of ammonium polyphosphate |
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| Affiliation: | 1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 210000, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing, 210000, China;3. Nanjing Vocational University of Industry Technology, Nanjing, 210000, China;1. School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, China;2. Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan;3. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;1. School of Environmental and Chemical Engineering, Jiangsu Ocean University, Lianyungang, 222005, China;2. School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan, 430070, China;3. Jiangsu Institute of Marine Resources Development, Jiangsu Ocean University, Lianyungang, 222005, China;1. ETSI Minas y Energía, Universidad Politécnica de Madrid, Madrid, Spain;2. Laboratorio Oficial JM de Madariaga, Universidad Politécnica de Madrid, Getafe, Spain;1. School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;2. State Key Lab. of Fire Science, University of Science and Technology of China, Hefei, 230026, China |
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| Abstract: | In this work, vinyltriethoxysilane (A151) and 3-aminopropyltriethoxysilane (KH550) were used to modify ammonium polyphosphate (APP), showing that the dispersibility of APP could be improved remarkably by A151 and KH550. The maximum explosion pressure of aluminum dust explosion decreased with the addition of APP, A151-APP (APP-A) and KH550-APP (APP-B), with the exception of the case where the inerting ratio (α) of APP-A was less than 0.4. After the addition of APP-B, there was little difference in flame propagation behavior and explosion pressure compared with that of adding APP, indicating that APP-B could retain the inhibition performance of APP compared with APP-A. When the inerting ratios of APP, APP-A and APP-B were 1.2, 1.4 and 1.4, respectively, the aluminum dust explosion could be completely inhibited. The explosion residues of aluminum dust/APP mainly consisted of Al2O3, P-containing and N-containing compounds. It could be analyzed that APP exerted the inhibition effect through both chemical and physical effects. |
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| Keywords: | Aluminum dust explosion Superior inhibitor Inhibition mechanism Coupling agent |
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