Acid-base method for the demineralization of pyrolytic carbon black |
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| Affiliation: | 1. Centre for Energy (M473), The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;2. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Street, Laoshan District, Qingdao 266101, China;3. University of Chinese Academy of Sciences, Beijing 10049, China;1. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Research Institute of Huazhong University of Science and Technology in Shenzhen, Shenzhen 518000, China;3. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;1. Department of Environmental Science, Institute of Science, University of Mumbai, Mumbai 400032, India;2. Indian Rubber Manufacturers Research Association (IRMRA), Plot No. 254/1B, Road No. 16V, Wagle Industrial Estate, Thane (West) 400604, India;3. Institute of Nano Engineering Research (INER) and Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Polymer Division, Pretoria, South Africa;4. Polymer, Petroleum and Coal Chemistry Group, Materials Sciences and Technology Division, CSIR–North East Institute of Science and Technology, Jorhat - 785 006, Assam, India;1. School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, Liaoning, China;2. Guangzhou Environmental Protection Investment Group, Guangzhou, 510000, Guangdong, China |
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| Abstract: | The carbon black material used as reinforcing filler in tires was recovered by vacuum pyrolysis at a temperature of 500°C and a total pressure of 20 kPa. The pyrolytic carbon black obtained (CBp) was contamined by various additives of the original tire. Contaminants were also produced by chemical reactions occurring in the pyrolysis reactor. The contamination is reflected by the high content of ash and gritty materials (coke) present in the CBp. A characterization of the recovered carbon black was performed and a possible reduction of the ash content by sulfuric acid and sodium hydroxide treatment was investigated. The variables which were studied included the ratio of reactant to carbon black, the reactant concentration, the treatment temperature and the reaction time. Properties of the commercial carbon black filler grade N539 were compared to those of the CBp recovered before and after the demineralization treatment. |
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